Vérifiez la connexion Internet avec Swift
Lorsque j'essaie de vérifier la connexion Internet sur mon iPhone, des erreurs se produisent. Quelqu'un peut-il m'aider à résoudre ce problème?
Le code:
import Foundation
import SystemConfiguration
public class Reachability {
class func isConnectedToNetwork() -> Bool {
var zeroAddress = sockaddr_in()
zeroAddress.sin_len = UInt8(sizeofValue(zeroAddress))
zeroAddress.sin_family = sa_family_t(AF_INET)
let defaultRouteReachability = withUnsafePointer(&zeroAddress) {
SCNetworkReachabilityCreateWithAddress(nil, UnsafePointer($0))
}
var flags: SCNetworkReachabilityFlags = 0
if SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags) == 0 {
return false
}
let isReachable = (flags & UInt32(kSCNetworkFlagsReachable)) != 0
let needsConnection = (flags & UInt32(kSCNetworkFlagsConnectionRequired)) != 0
return (isReachable && !needsConnection) ? true : false
}
}
Les erreurs avec le code:
S'il est illisible, l'erreur 1 indique:
'Int' n'est pas convertible en 'SCNetworkReachabilityFlags'
Erreur 2 & 3:
Impossible de trouver une surcharge pour 'init' qui accepte les arguments fournis
Pour résoudre le problème de la 4G mentionné dans les commentaires, j'ai utilisé l'implémentation d'accessibilité de @AshleyMills comme référence et réécrit l'accessibilité pour Swift 3.1:
mis à jour: Xcode 10.1 • Swift 4.2.1
Fichier Accessibilité.Swift
import Foundation
import SystemConfiguration
class Reachability {
var hostname: String?
var isRunning = false
var isReachableOnWWAN: Bool
var reachability: SCNetworkReachability?
var reachabilityFlags = SCNetworkReachabilityFlags()
let reachabilitySerialQueue = DispatchQueue(label: "ReachabilityQueue")
init?(hostname: String) throws {
guard let reachability = SCNetworkReachabilityCreateWithName(nil, hostname) else {
throw Network.Error.failedToCreateWith(hostname)
}
self.reachability = reachability
self.hostname = hostname
isReachableOnWWAN = true
try start()
}
init() throws {
var zeroAddress = sockaddr_in()
zeroAddress.sin_len = UInt8(MemoryLayout<sockaddr_in>.size)
zeroAddress.sin_family = sa_family_t(AF_INET)
guard let reachability = withUnsafePointer(to: &zeroAddress, {
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
SCNetworkReachabilityCreateWithAddress(nil, $0)
}
}) else {
throw Network.Error.failedToInitializeWith(zeroAddress)
}
self.reachability = reachability
isReachableOnWWAN = true
try start()
}
var status: Network.Status {
return !isConnectedToNetwork ? .unreachable :
isReachableViaWiFi ? .wifi :
isRunningOnDevice ? .wwan : .unreachable
}
var isRunningOnDevice: Bool = {
#if targetEnvironment(simulator)
return false
#else
return true
#endif
}()
deinit { stop() }
}
extension Reachability {
func start() throws {
guard let reachability = reachability, !isRunning else { return }
var context = SCNetworkReachabilityContext(version: 0, info: nil, retain: nil, release: nil, copyDescription: nil)
context.info = Unmanaged<Reachability>.passUnretained(self).toOpaque()
guard SCNetworkReachabilitySetCallback(reachability, callout, &context) else { stop()
throw Network.Error.failedToSetCallout
}
guard SCNetworkReachabilitySetDispatchQueue(reachability, reachabilitySerialQueue) else { stop()
throw Network.Error.failedToSetDispatchQueue
}
reachabilitySerialQueue.async { self.flagsChanged() }
isRunning = true
}
func stop() {
defer { isRunning = false }
guard let reachability = reachability else { return }
SCNetworkReachabilitySetCallback(reachability, nil, nil)
SCNetworkReachabilitySetDispatchQueue(reachability, nil)
self.reachability = nil
}
var isConnectedToNetwork: Bool {
return isReachable &&
!isConnectionRequiredAndTransientConnection &&
!(isRunningOnDevice && isWWAN && !isReachableOnWWAN)
}
var isReachableViaWiFi: Bool {
return isReachable && isRunningOnDevice && !isWWAN
}
/// Flags that indicate the reachability of a network node name or address, including whether a connection is required, and whether some user intervention might be required when establishing a connection.
var flags: SCNetworkReachabilityFlags? {
guard let reachability = reachability else { return nil }
var flags = SCNetworkReachabilityFlags()
return withUnsafeMutablePointer(to: &flags) {
SCNetworkReachabilityGetFlags(reachability, UnsafeMutablePointer($0))
} ? flags : nil
}
/// compares the current flags with the previous flags and if changed posts a flagsChanged notification
func flagsChanged() {
guard let flags = flags, flags != reachabilityFlags else { return }
reachabilityFlags = flags
NotificationCenter.default.post(name: .flagsChanged, object: self)
}
/// The specified node name or address can be reached via a transient connection, such as PPP.
var transientConnection: Bool { return flags?.contains(.transientConnection) == true }
/// The specified node name or address can be reached using the current network configuration.
var isReachable: Bool { return flags?.contains(.reachable) == true }
/// The specified node name or address can be reached using the current network configuration, but a connection must first be established. If this flag is set, the kSCNetworkReachabilityFlagsConnectionOnTraffic flag, kSCNetworkReachabilityFlagsConnectionOnDemand flag, or kSCNetworkReachabilityFlagsIsWWAN flag is also typically set to indicate the type of connection required. If the user must manually make the connection, the kSCNetworkReachabilityFlagsInterventionRequired flag is also set.
var connectionRequired: Bool { return flags?.contains(.connectionRequired) == true }
/// The specified node name or address can be reached using the current network configuration, but a connection must first be established. Any traffic directed to the specified name or address will initiate the connection.
var connectionOnTraffic: Bool { return flags?.contains(.connectionOnTraffic) == true }
/// The specified node name or address can be reached using the current network configuration, but a connection must first be established.
var interventionRequired: Bool { return flags?.contains(.interventionRequired) == true }
/// The specified node name or address can be reached using the current network configuration, but a connection must first be established. The connection will be established "On Demand" by the CFSocketStream programming interface (see CFStream Socket Additions for information on this). Other functions will not establish the connection.
var connectionOnDemand: Bool { return flags?.contains(.connectionOnDemand) == true }
/// The specified node name or address is one that is associated with a network interface on the current system.
var isLocalAddress: Bool { return flags?.contains(.isLocalAddress) == true }
/// Network traffic to the specified node name or address will not go through a gateway, but is routed directly to one of the interfaces in the system.
var isDirect: Bool { return flags?.contains(.isDirect) == true }
/// The specified node name or address can be reached via a cellular connection, such as Edge or GPRS.
var isWWAN: Bool { return flags?.contains(.isWWAN) == true }
/// The specified node name or address can be reached using the current network configuration, but a connection must first be established. If this flag is set
/// The specified node name or address can be reached via a transient connection, such as PPP.
var isConnectionRequiredAndTransientConnection: Bool {
return (flags?.intersection([.connectionRequired, .transientConnection]) == [.connectionRequired, .transientConnection]) == true
}
}
func callout(reachability: SCNetworkReachability, flags: SCNetworkReachabilityFlags, info: UnsafeMutableRawPointer?) {
guard let info = info else { return }
DispatchQueue.main.async {
Unmanaged<Reachability>
.fromOpaque(info)
.takeUnretainedValue()
.flagsChanged()
}
}
extension Notification.Name {
static let flagsChanged = Notification.Name("FlagsChanged")
}
struct Network {
static var reachability: Reachability!
enum Status: String {
case unreachable, wifi, wwan
}
enum Error: Swift.Error {
case failedToSetCallout
case failedToSetDispatchQueue
case failedToCreateWith(String)
case failedToInitializeWith(sockaddr_in)
}
}
Usage
Initialisez-le dans votre méthode AppDelegate.Swift didFinishLaunchingWithOptions et gérez les erreurs qui pourraient survenir:
import UIKit
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
do {
try Network.reachability = Reachability(hostname: "www.google.com")
}
catch {
switch error as? Network.Error {
case let .failedToCreateWith(hostname)?:
print("Network error:\nFailed to create reachability object With Host named:", hostname)
case let .failedToInitializeWith(address)?:
print("Network error:\nFailed to initialize reachability object With address:", address)
case .failedToSetCallout?:
print("Network error:\nFailed to set callout")
case .failedToSetDispatchQueue?:
print("Network error:\nFailed to set DispatchQueue")
case .none:
print(error)
}
}
return true
}
}
Et un exemple de contrôleur de vue:
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default
.addObserver(self,
selector: #selector(statusManager),
name: .flagsChanged,
object: nil)
updateUserInterface()
}
func updateUserInterface() {
switch Network.reachability.status {
case .unreachable:
view.backgroundColor = .red
case .wwan:
view.backgroundColor = .yellow
case .wifi:
view.backgroundColor = .green
}
print("Reachability Summary")
print("Status:", Network.reachability.status)
print("HostName:", Network.reachability.hostname ?? "nil")
print("Reachable:", Network.reachability.isReachable)
print("Wifi:", Network.reachability.isReachableViaWiFi)
}
@objc func statusManager(_ notification: Notification) {
updateUserInterface()
}
}
Pour Swift 3, Swift 4 (fonctionne avec le cellulaire et le Wi-Fi):
import SystemConfiguration
public class Reachability {
class func isConnectedToNetwork() -> Bool {
var zeroAddress = sockaddr_in(sin_len: 0, sin_family: 0, sin_port: 0, sin_addr: in_addr(s_addr: 0), sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
zeroAddress.sin_len = UInt8(MemoryLayout.size(ofValue: zeroAddress))
zeroAddress.sin_family = sa_family_t(AF_INET)
let defaultRouteReachability = withUnsafePointer(to: &zeroAddress) {
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {zeroSockAddress in
SCNetworkReachabilityCreateWithAddress(nil, zeroSockAddress)
}
}
var flags: SCNetworkReachabilityFlags = SCNetworkReachabilityFlags(rawValue: 0)
if SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) == false {
return false
}
/* Only Working for WIFI
let isReachable = flags == .reachable
let needsConnection = flags == .connectionRequired
return isReachable && !needsConnection
*/
// Working for Cellular and WIFI
let isReachable = (flags.rawValue & UInt32(kSCNetworkFlagsReachable)) != 0
let needsConnection = (flags.rawValue & UInt32(kSCNetworkFlagsConnectionRequired)) != 0
let ret = (isReachable && !needsConnection)
return ret
}
}
Utilisation:
if Reachability.isConnectedToNetwork(){
print("Internet Connection Available!")
}else{
print("Internet Connection not Available!")
}
Créez un nouveau fichier Swift dans votre projet, nommez-le Reachability.Swift. Coupez et collez le code suivant pour créer votre classe.
import Foundation
import SystemConfiguration
public class Reachability {
class func isConnectedToNetwork() -> Bool {
var zeroAddress = sockaddr_in(sin_len: 0, sin_family: 0, sin_port: 0, sin_addr: in_addr(s_addr: 0), sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
zeroAddress.sin_len = UInt8(sizeofValue(zeroAddress))
zeroAddress.sin_family = sa_family_t(AF_INET)
let defaultRouteReachability = withUnsafePointer(&zeroAddress) {
SCNetworkReachabilityCreateWithAddress(kCFAllocatorDefault, UnsafePointer($0))
}
var flags: SCNetworkReachabilityFlags = SCNetworkReachabilityFlags(rawValue: 0)
if SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) == false {
return false
}
let isReachable = flags == .Reachable
let needsConnection = flags == .ConnectionRequired
return isReachable && !needsConnection
}
}
Vous pouvez vérifier la connexion Internet n'importe où dans votre projet en utilisant ce code:
if Reachability.isConnectedToNetwork() == true {
println("Internet connection OK")
} else {
println("Internet connection FAILED")
}
Si l'utilisateur n'est pas connecté à Internet, vous pouvez lui montrer une boîte de dialogue d'alerte pour le prévenir.
if Reachability.isConnectedToNetwork() == true {
println("Internet connection OK")
} else {
println("Internet connection FAILED")
var alert = UIAlertView(title: "No Internet Connection", message: "Make sure your device is connected to the internet.", delegate: nil, cancelButtonTitle: "OK")
alert.show()
}
Explication:
Nous créons une classe publique réutilisable et une méthode utilisable n'importe où dans le projet pour vérifier la connectivité Internet. Nous avons besoin d'ajouter des infrastructures Foundation et System Configuration.
Dans la classe publique Accessibilité, la méthode isConnectedToNetwork() -> Bool { } renvoie une valeur bool sur la connectivité Internet. Nous utilisons une boucle if pour effectuer les actions requises sur le cas. J'espère que cela suffit. À votre santé!
Si quelqu'un utilise déjà Alamofire alors -
struct Connectivity {
static let sharedInstance = NetworkReachabilityManager()!
static var isConnectedToInternet:Bool {
return self.sharedInstance.isReachable
}
}
Utilisation:
if Connectivity.isConnectedToInternet {
print("Connected")
} else {
print("No Internet")
}
J'ai vérifié la mise en œuvre de la classe d'accessibilité de Ashley Mill sans Cocoa Pods/Dependancy Manager. L'idée est de rendre la dépendance de l'accessibilité libre dans le projet.
Xcode 7.2 - Swift 2.1
1) https://github.com/ashleymills/Reachability.Swift . Télécharger ajouter la classe d'accessibilité au projet.
Remarque: lors de l'ajout, assurez-vous que l'option "Copier les éléments si nécessaire" est cochée.
2) Créez une classe AppManager.Swift. Cette classe sera considérée comme une classe de modèle public où des méthodes et des données publiques seront ajoutées et pourront être utilisées dans n'importe quel VC.
// AppManager.Swift
import UIKit
import Foundation
class AppManager: NSObject{
var delegate:AppManagerDelegate? = nil
private var _useClosures:Bool = false
private var reachability: Reachability?
private var _isReachability:Bool = false
private var _reachabiltyNetworkType :String?
var isReachability:Bool {
get {return _isReachability}
}
var reachabiltyNetworkType:String {
get {return _reachabiltyNetworkType! }
}
// Create a shared instance of AppManager
final class var sharedInstance : AppManager {
struct Static {
static var instance : AppManager?
}
if !(Static.instance != nil) {
Static.instance = AppManager()
}
return Static.instance!
}
// Reachability Methods
func initRechabilityMonitor() {
print("initialize rechability...")
do {
let reachability = try Reachability.reachabilityForInternetConnection()
self.reachability = reachability
} catch ReachabilityError.FailedToCreateWithAddress(let address) {
print("Unable to create\nReachability with address:\n\(address)")
return
} catch {}
if (_useClosures) {
reachability?.whenReachable = { reachability in
self.notifyReachability(reachability)
}
reachability?.whenUnreachable = { reachability in
self.notifyReachability(reachability)
}
} else {
self.notifyReachability(reachability!)
}
do {
try reachability?.startNotifier()
} catch {
print("unable to start notifier")
return
}
}
private func notifyReachability(reachability:Reachability) {
if reachability.isReachable() {
self._isReachability = true
//Determine Network Type
if reachability.isReachableViaWiFi() {
self._reachabiltyNetworkType = CONNECTION_NETWORK_TYPE.WIFI_NETWORK.rawValue
} else {
self._reachabiltyNetworkType = CONNECTION_NETWORK_TYPE.WWAN_NETWORK.rawValue
}
} else {
self._isReachability = false
self._reachabiltyNetworkType = CONNECTION_NETWORK_TYPE.OTHER.rawValue
}
NSNotificationCenter.defaultCenter().addObserver(self, selector: "reachabilityChanged:", name: ReachabilityChangedNotification, object: reachability)
}
func reachabilityChanged(note: NSNotification) {
let reachability = note.object as! Reachability
dispatch_async(dispatch_get_main_queue()) {
if (self._useClosures) {
self.reachability?.whenReachable = { reachability in
self.notifyReachability(reachability)
}
self.reachability?.whenUnreachable = { reachability in
self.notifyReachability(reachability)
}
} else {
self.notifyReachability(reachability)
}
self.delegate?.reachabilityStatusChangeHandler(reachability)
}
}
deinit {
reachability?.stopNotifier()
if (!_useClosures) {
NSNotificationCenter.defaultCenter().removeObserver(self, name: ReachabilityChangedNotification, object: nil)
}
}
}
3) Faire une classe de délégué. J'utilise la méthode déléguée pour notifier l'état de la connectivité.
// Protocols.Swift
import Foundation
@objc protocol AppManagerDelegate:NSObjectProtocol {
func reachabilityStatusChangeHandler(reachability:Reachability)
}
4) Créez la classe parent de UIViewController (méthode d'héritage). La classe parente a des méthodes accessibles à tous les VC enfants.
// UIappViewController.Swift
import UIKit
class UIappViewController: UIViewController,AppManagerDelegate {
var manager:AppManager = AppManager.sharedInstance
override func viewDidLoad() {
super.viewDidLoad()
manager.delegate = self
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func reachabilityStatusChangeHandler(reachability: Reachability) {
if reachability.isReachable() {
print("isReachable")
} else {
print("notReachable")
}
}
}
5) Démarrer la surveillance de la connectivité Internet en temps réel dans AppDelegate.
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
AppManager.sharedInstance.initRechabilityMonitor()
return true
}
6) J'ai ajouté un nom de fichier Swift AppReference pour stocker des valeurs constantes.
// AppReference.Swift
import Foundation
enum CONNECTION_NETWORK_TYPE : String {
case WIFI_NETWORK = "Wifi"
case WWAN_NETWORK = "Cellular"
case OTHER = "Other"
}
7) Sur ViewController (par exemple, vous voulez appeler une API uniquement si le réseau est disponible)
// ViewController.Swift
import UIKit
class ViewController: UIappViewController {
var reachability:Reachability?
override func viewDidLoad() {
super.viewDidLoad()
manager.delegate = self
if(AppManager.sharedInstance.isReachability)
{
print("net available")
//call API from here.
} else {
dispatch_async(dispatch_get_main_queue()) {
print("net not available")
//Show Alert
}
}
//Determine Network Type
if(AppManager.sharedInstance.reachabiltyNetworkType == "Wifi")
{
print(".Wifi")
}
else if (AppManager.sharedInstance.reachabiltyNetworkType == "Cellular")
{
print(".Cellular")
}
else {
dispatch_async(dispatch_get_main_queue()) {
print("Network not reachable")
}
}
}
override func viewWillAppear(animated: Bool) {
}
override func didReceiveMemoryWarning() {
}
}
L'exemple peut être téléchargé @ https://github.com/alvinreuben/Reachability-Sample
Mis à niveau vers Swift 3.1- https://github.com/alvinvgeorge/Reachability-UpgradedToSwift3
Je viens de comprendre cela pour moi-même.
Xcode: 7.3.1, iOS 9.3.3
En utilisant ashleymills/Reachability.Swift comme Reachability.Swift dans mon projet, j'ai créé la fonction suivante:
func hasConnectivity() -> Bool {
do {
let reachability: Reachability = try Reachability.reachabilityForInternetConnection()
let networkStatus: Int = reachability.currentReachabilityStatus.hashValue
return (networkStatus != 0)
}
catch {
// Handle error however you please
return false
}
}
Appelez simplement hasConnectivity() là où vous avez besoin de vérifier une connexion. Cela fonctionne pour le Wifi aussi bien que cellulaire.
Ajout de l'accessibilité.Swift d'ashleymills pour que les gens n'aient pas à se déplacer entre les sites:
Copyright (c) 2014, Ashley Mills
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
// Reachability.Swift version 2.2beta2
import SystemConfiguration
import Foundation
public enum ReachabilityError: ErrorType {
case FailedToCreateWithAddress(sockaddr_in)
case FailedToCreateWithHostname(String)
case UnableToSetCallback
case UnableToSetDispatchQueue
}
public let ReachabilityChangedNotification = "ReachabilityChangedNotification"
func callback(reachability:SCNetworkReachability, flags: SCNetworkReachabilityFlags, info: UnsafeMutablePointer<Void>) {
let reachability = Unmanaged<Reachability>.fromOpaque(COpaquePointer(info)).takeUnretainedValue()
dispatch_async(dispatch_get_main_queue()) {
reachability.reachabilityChanged(flags)
}
}
public class Reachability: NSObject {
public typealias NetworkReachable = (Reachability) -> ()
public typealias NetworkUnreachable = (Reachability) -> ()
public enum NetworkStatus: CustomStringConvertible {
case NotReachable, ReachableViaWiFi, ReachableViaWWAN
public var description: String {
switch self {
case .ReachableViaWWAN:
return "Cellular"
case .ReachableViaWiFi:
return "WiFi"
case .NotReachable:
return "No Connection"
}
}
}
// MARK: - *** Public properties ***
public var whenReachable: NetworkReachable?
public var whenUnreachable: NetworkUnreachable?
public var reachableOnWWAN: Bool
public var notificationCenter = NSNotificationCenter.defaultCenter()
public var currentReachabilityStatus: NetworkStatus {
if isReachable() {
if isReachableViaWiFi() {
return .ReachableViaWiFi
}
if isRunningOnDevice {
return .ReachableViaWWAN
}
}
return .NotReachable
}
public var currentReachabilityString: String {
return "\(currentReachabilityStatus)"
}
private var previousFlags: SCNetworkReachabilityFlags?
// MARK: - *** Initialisation methods ***
required public init(reachabilityRef: SCNetworkReachability) {
reachableOnWWAN = true
self.reachabilityRef = reachabilityRef
}
public convenience init(hostname: String) throws {
let nodename = (hostname as NSString).UTF8String
guard let ref = SCNetworkReachabilityCreateWithName(nil, nodename) else { throw ReachabilityError.FailedToCreateWithHostname(hostname) }
self.init(reachabilityRef: ref)
}
public class func reachabilityForInternetConnection() throws -> Reachability {
var zeroAddress = sockaddr_in()
zeroAddress.sin_len = UInt8(sizeofValue(zeroAddress))
zeroAddress.sin_family = sa_family_t(AF_INET)
guard let ref = withUnsafePointer(&zeroAddress, {
SCNetworkReachabilityCreateWithAddress(nil, UnsafePointer($0))
}) else { throw ReachabilityError.FailedToCreateWithAddress(zeroAddress) }
return Reachability(reachabilityRef: ref)
}
public class func reachabilityForLocalWiFi() throws -> Reachability {
var localWifiAddress: sockaddr_in = sockaddr_in(sin_len: __uint8_t(0), sin_family: sa_family_t(0), sin_port: in_port_t(0), sin_addr: in_addr(s_addr: 0), sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
localWifiAddress.sin_len = UInt8(sizeofValue(localWifiAddress))
localWifiAddress.sin_family = sa_family_t(AF_INET)
// IN_LINKLOCALNETNUM is defined in <netinet/in.h> as 169.254.0.0
let address: UInt32 = 0xA9FE0000
localWifiAddress.sin_addr.s_addr = in_addr_t(address.bigEndian)
guard let ref = withUnsafePointer(&localWifiAddress, {
SCNetworkReachabilityCreateWithAddress(nil, UnsafePointer($0))
}) else { throw ReachabilityError.FailedToCreateWithAddress(localWifiAddress) }
return Reachability(reachabilityRef: ref)
}
// MARK: - *** Notifier methods ***
public func startNotifier() throws {
guard !notifierRunning else { return }
var context = SCNetworkReachabilityContext(version: 0, info: nil, retain: nil, release: nil, copyDescription: nil)
context.info = UnsafeMutablePointer(Unmanaged.passUnretained(self).toOpaque())
if !SCNetworkReachabilitySetCallback(reachabilityRef!, callback, &context) {
stopNotifier()
throw ReachabilityError.UnableToSetCallback
}
if !SCNetworkReachabilitySetDispatchQueue(reachabilityRef!, reachabilitySerialQueue) {
stopNotifier()
throw ReachabilityError.UnableToSetDispatchQueue
}
// Perform an intial check
dispatch_async(reachabilitySerialQueue) { () -> Void in
let flags = self.reachabilityFlags
self.reachabilityChanged(flags)
}
notifierRunning = true
}
public func stopNotifier() {
defer { notifierRunning = false }
guard let reachabilityRef = reachabilityRef else { return }
SCNetworkReachabilitySetCallback(reachabilityRef, nil, nil)
SCNetworkReachabilitySetDispatchQueue(reachabilityRef, nil)
}
// MARK: - *** Connection test methods ***
public func isReachable() -> Bool {
let flags = reachabilityFlags
return isReachableWithFlags(flags)
}
public func isReachableViaWWAN() -> Bool {
let flags = reachabilityFlags
// Check we're not on the simulator, we're REACHABLE and check we're on WWAN
return isRunningOnDevice && isReachable(flags) && isOnWWAN(flags)
}
public func isReachableViaWiFi() -> Bool {
let flags = reachabilityFlags
// Check we're reachable
if !isReachable(flags) {
return false
}
// Must be on WiFi if reachable but not on an iOS device (i.e. simulator)
if !isRunningOnDevice {
return true
}
// Check we're NOT on WWAN
return !isOnWWAN(flags)
}
// MARK: - *** Private methods ***
private var isRunningOnDevice: Bool = {
#if (Arch(i386) || Arch(x86_64)) && os(iOS)
return false
#else
return true
#endif
}()
private var notifierRunning = false
private var reachabilityRef: SCNetworkReachability?
private let reachabilitySerialQueue = dispatch_queue_create("uk.co.ashleymills.reachability", DISPATCH_QUEUE_SERIAL)
private func reachabilityChanged(flags: SCNetworkReachabilityFlags) {
guard previousFlags != flags else { return }
if isReachableWithFlags(flags) {
if let block = whenReachable {
block(self)
}
} else {
if let block = whenUnreachable {
block(self)
}
}
notificationCenter.postNotificationName(ReachabilityChangedNotification, object:self)
previousFlags = flags
}
private func isReachableWithFlags(flags: SCNetworkReachabilityFlags) -> Bool {
if !isReachable(flags) {
return false
}
if isConnectionRequiredOrTransient(flags) {
return false
}
if isRunningOnDevice {
if isOnWWAN(flags) && !reachableOnWWAN {
// We don't want to connect when on 3G.
return false
}
}
return true
}
// WWAN may be available, but not active until a connection has been established.
// WiFi may require a connection for VPN on Demand.
private func isConnectionRequired() -> Bool {
return connectionRequired()
}
private func connectionRequired() -> Bool {
let flags = reachabilityFlags
return isConnectionRequired(flags)
}
// Dynamic, on demand connection?
private func isConnectionOnDemand() -> Bool {
let flags = reachabilityFlags
return isConnectionRequired(flags) && isConnectionOnTrafficOrDemand(flags)
}
// Is user intervention required?
private func isInterventionRequired() -> Bool {
let flags = reachabilityFlags
return isConnectionRequired(flags) && isInterventionRequired(flags)
}
private func isOnWWAN(flags: SCNetworkReachabilityFlags) -> Bool {
#if os(iOS)
return flags.contains(.IsWWAN)
#else
return false
#endif
}
private func isReachable(flags: SCNetworkReachabilityFlags) -> Bool {
return flags.contains(.Reachable)
}
private func isConnectionRequired(flags: SCNetworkReachabilityFlags) -> Bool {
return flags.contains(.ConnectionRequired)
}
private func isInterventionRequired(flags: SCNetworkReachabilityFlags) -> Bool {
return flags.contains(.InterventionRequired)
}
private func isConnectionOnTraffic(flags: SCNetworkReachabilityFlags) -> Bool {
return flags.contains(.ConnectionOnTraffic)
}
private func isConnectionOnDemand(flags: SCNetworkReachabilityFlags) -> Bool {
return flags.contains(.ConnectionOnDemand)
}
func isConnectionOnTrafficOrDemand(flags: SCNetworkReachabilityFlags) -> Bool {
return !flags.intersect([.ConnectionOnTraffic, .ConnectionOnDemand]).isEmpty
}
private func isTransientConnection(flags: SCNetworkReachabilityFlags) -> Bool {
return flags.contains(.TransientConnection)
}
private func isLocalAddress(flags: SCNetworkReachabilityFlags) -> Bool {
return flags.contains(.IsLocalAddress)
}
private func isDirect(flags: SCNetworkReachabilityFlags) -> Bool {
return flags.contains(.IsDirect)
}
private func isConnectionRequiredOrTransient(flags: SCNetworkReachabilityFlags) -> Bool {
let testcase:SCNetworkReachabilityFlags = [.ConnectionRequired, .TransientConnection]
return flags.intersect(testcase) == testcase
}
private var reachabilityFlags: SCNetworkReachabilityFlags {
guard let reachabilityRef = reachabilityRef else { return SCNetworkReachabilityFlags() }
var flags = SCNetworkReachabilityFlags()
let gotFlags = withUnsafeMutablePointer(&flags) {
SCNetworkReachabilityGetFlags(reachabilityRef, UnsafeMutablePointer($0))
}
if gotFlags {
return flags
} else {
return SCNetworkReachabilityFlags()
}
}
override public var description: String {
var W: String
if isRunningOnDevice {
W = isOnWWAN(reachabilityFlags) ? "W" : "-"
} else {
W = "X"
}
let R = isReachable(reachabilityFlags) ? "R" : "-"
let c = isConnectionRequired(reachabilityFlags) ? "c" : "-"
let t = isTransientConnection(reachabilityFlags) ? "t" : "-"
let i = isInterventionRequired(reachabilityFlags) ? "i" : "-"
let C = isConnectionOnTraffic(reachabilityFlags) ? "C" : "-"
let D = isConnectionOnDemand(reachabilityFlags) ? "D" : "-"
let l = isLocalAddress(reachabilityFlags) ? "l" : "-"
let d = isDirect(reachabilityFlags) ? "d" : "-"
return "\(W)\(R) \(c)\(t)\(i)\(C)\(D)\(l)\(d)"
}
deinit {
stopNotifier()
reachabilityRef = nil
whenReachable = nil
whenUnreachable = nil
}
}
Apple a introduit Network Framework dans iOS12.
import Foundation
import Network
class NetworkReachability {
var pathMonitor: NWPathMonitor!
var path: NWPath?
var pathUpdateHandler: ((NWPath) -> Void) = { path in
self.path = path
if path.status == NWPath.Status.satisfied {
print("Connected")
} else if path.status == NWPath.Status.unsatisfied {
print("unsatisfied")
} else if path.status == NWPath.Status.requiresConnection {
print("requiresConnection")
}
}
let backgroudQueue = DispatchQueue.global(qos: .background)
init() {
pathMonitor = NWPathMonitor()
pathMonitor.pathUpdateHandler = self.pathUpdateHandler
pathMonitor.start(queue: backgroudQueue)
}
func isNetworkAvailable() -> Bool {
if let path = self.path {
if path.status == NWPath.Status.satisfied {
return true
}
}
return false
}
}
Si vous utilisez Alamofire, vous pouvez faire quelque chose comme ceci:
let configuration = NSURLSessionConfiguration.defaultSessionConfiguration()
configuration.timeoutIntervalForRequest = 15 //Set timeouts in sec
configuration.timeoutIntervalForResource = 15
let alamoFireManager = Alamofire.Manager(configuration:configuration)
alamoFireManager?.request(.GET, "https://yourURL.com", parameters: headers, encoding: .URL)
.validate()
.responseJSON { response in
if let error = response.result.error {
switch error.code{
case -1001:
print("Slow connection")
return
case -1009:
print("No Connection!")
return
default: break
}
}
J'ai créé ma propre solution en utilisant NSTimer et Alamofire:
import Alamofire
public class ConnectionHelper: NSObject {
var request: Alamofire.Request?
func isInternetConnected(completionHandler: Bool -> Void) {
NSTimer.scheduledTimerWithTimeInterval(5.0, target: self, selector: "requestTimeout", userInfo: nil, repeats: false)
request = Alamofire
.request(
Method.HEAD,
"http://www.testurl.com"
)
.response { response in
if response.3?.code == -999 {
completionHandler(
false
)
} else {
completionHandler(
true
)
}
}
}
func requestTimeout() {
request!.cancel()
}
}
NSTimer est utilisé comme délai d'attente, mais en raison de résultats non fiables utilisant le délai d'attente d'Alamofire. La demande doit être adressée à une URL en laquelle vous avez confiance, telle que votre propre serveur ou le serveur hébergeant les services dont vous dépendez.
Lorsque le délai expire, la demande est annulée et les résultats sont renvoyés à l'aide d'un gestionnaire d'achèvement.
Usage:
ConnectionHelper().isInternetConnected() { internetConnected in
if internetConnected {
// Connected
} else {
// Not connected
}
}
voici ma solution pour Swift 2.3 avec la lib ( Accessibilité.Swift )
Allez dans votre Podfile et ajoutez:
pod 'ReachabilitySwift', '~> 2.4' // Swift 2.3
Puis dans votre terminal:
pod install
Créez ensuite un nouveau fichier ReachabilityManager et ajoutez le code ci-dessous:
import Foundation
import ReachabilitySwift
enum ReachabilityManagerType {
case Wifi
case Cellular
case None
}
class ReachabilityManager {
static let sharedInstance = ReachabilityManager()
private var reachability: Reachability!
private var reachabilityManagerType: ReachabilityManagerType = .None
private init() {
do {
self.reachability = try Reachability.reachabilityForInternetConnection()
} catch {
print("Unable to create Reachability")
return
}
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(ReachabilityManager.reachabilityChanged(_:)),name: ReachabilityChangedNotification,object: self.reachability)
do{
try self.reachability.startNotifier()
}catch{
print("could not start reachability notifier")
}
}
@objc private func reachabilityChanged(note: NSNotification) {
let reachability = note.object as! Reachability
if reachability.isReachable() {
if reachability.isReachableViaWiFi() {
self.reachabilityManagerType = .Wifi
} else {
self.reachabilityManagerType = .Cellular
}
} else {
self.reachabilityManagerType = .None
}
}
}
extension ReachabilityManager {
func isConnectedToNetwork() -> Bool {
return reachabilityManagerType != .None
}
}
Comment l'utiliser:
allez dans votre AppDelegate.Swift et ajoutez le code ci-dessous:
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
ReachabilityManager.sharedInstance
}
Ensuite, lorsque vous voulez vérifier si l'appareil est connecté à Internet, faites:
if ReachabilityManager.sharedInstance.isConnectedToNetwork() {
// Connected
} else {
// Not connected
}
Ceci est ma version. Essentiellement, cela n'apporte rien de nouveau. Je l'ai lié à UIDevice.
import UIKit
import SystemConfiguration
extension UIDevice {
open class var isConnectedToNetwork: Bool {
get {
var zeroAddress = sockaddr_in()
zeroAddress.sin_len = UInt8(MemoryLayout.size(ofValue: zeroAddress))
zeroAddress.sin_family = sa_family_t(AF_INET)
guard
let defaultRouteReachability: SCNetworkReachability = withUnsafePointer(to: &zeroAddress, {
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
SCNetworkReachabilityCreateWithAddress(nil, $0)
}
}),
var flags: SCNetworkReachabilityFlags = SCNetworkReachabilityFlags() as SCNetworkReachabilityFlags?,
SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags)
else { return false }
return flags.contains(.reachable) && !flags.contains(.connectionRequired)
}
}
}
print("Network status availability: " + ( UIDevice.isConnectedToNetwork ? "true" : "false" ))
Pour Swift 3, je ne pouvais pas simplement utiliser l'accessibilité des solutions RAJAMOHAN-S, car le résultat est "true" s'il existe une connexion WiFi, mais pas Internet. Ainsi, j'ai implémenté la deuxième validation via la classe URLSession et le gestionnaire d'achèvement.
Voici la classe entière.
import Foundation
import SystemConfiguration
public class Reachability {
class func isConnectedToNetwork() -> Bool {
var zeroAddress = sockaddr_in(sin_len: 0, sin_family: 0, sin_port: 0, sin_addr: in_addr(s_addr: 0), sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
zeroAddress.sin_len = UInt8(MemoryLayout.size(ofValue: zeroAddress))
zeroAddress.sin_family = sa_family_t(AF_INET)
let defaultRouteReachability = withUnsafePointer(to: &zeroAddress) {
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {zeroSockAddress in
SCNetworkReachabilityCreateWithAddress(nil, zeroSockAddress)
}
}
var flags: SCNetworkReachabilityFlags = SCNetworkReachabilityFlags(rawValue: 0)
if SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) == false {
return false
}
// Working for Cellular and WIFI
let isReachable = (flags.rawValue & UInt32(kSCNetworkFlagsReachable)) != 0
let needsConnection = (flags.rawValue & UInt32(kSCNetworkFlagsConnectionRequired)) != 0
let ret = (isReachable && !needsConnection)
return ret
}
class func isInternetAvailable(webSiteToPing: String?, completionHandler: @escaping (Bool) -> Void) {
// 1. Check the WiFi Connection
guard isConnectedToNetwork() else {
completionHandler(false)
return
}
// 2. Check the Internet Connection
var webAddress = "https://www.google.com" // Default Web Site
if let _ = webSiteToPing {
webAddress = webSiteToPing!
}
guard let url = URL(string: webAddress) else {
completionHandler(false)
print("could not create url from: \(webAddress)")
return
}
let urlRequest = URLRequest(url: url)
let session = URLSession.shared
let task = session.dataTask(with: urlRequest, completionHandler: { (data, response, error) in
if error != nil || response == nil {
completionHandler(false)
} else {
completionHandler(true)
}
})
task.resume()
}
}
Et vous appelez ça comme ça, par exemple:
Reachability.isInternetAvailable(webSiteToPing: nil) { (isInternetAvailable) in
guard isInternetAvailable else {
// Inform user for example
return
}
// Do some action if there is Internet
}
Avec l'aide du code ci-dessous, vous pouvez vérifier la connexion Internet du réseau cellulaire ainsi que du wifi langue - Swift 3.0
import UIKit
import Foundation
import SystemConfiguration
class NetworkConnection: UIViewController {
class func isConnectedToNetwork() -> Bool {
var zeroAddress = sockaddr_in(sin_len: 0, sin_family: 0, sin_port: 0, sin_addr: in_addr(s_addr: 0), sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
zeroAddress.sin_len = UInt8(MemoryLayout.size(ofValue: zeroAddress))
zeroAddress.sin_family = sa_family_t(AF_INET)
guard let defaultRouteReachability = withUnsafePointer(to: &zeroAddress, {
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
SCNetworkReachabilityCreateWithAddress(nil, $0)
}
}) else {
return false
}
var flags: SCNetworkReachabilityFlags = SCNetworkReachabilityFlags(rawValue: 0)
if SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags) == false {
return false
}
let isReachable = (flags.rawValue & UInt32(kSCNetworkFlagsReachable)) != 0
let needsConnection = (flags.rawValue & UInt32(kSCNetworkFlagsConnectionRequired)) != 0
return (isReachable && !needsConnection)
}
class func checkConnection(sender:UIViewController){
if NetworkConnection.isConnectedToNetwork() == true {
print("Connected to the internet")
// Do something
} else {
print("No internet connection")
let alertController = UIAlertController(title: "No Internet Available", message: "", preferredStyle: UIAlertControllerStyle.alert)
let okAction = UIAlertAction(title: "Ok", style: UIAlertActionStyle.default){(result:UIAlertAction) -> Void in
return
}
alertController.addAction(okAction)
sender.present(alertController, animated: true, completion: nil)
// Do something
}
}
}
Bien que le téléphone ne puisse pas déterminer directement si le téléphone est connecté à un réseau, la solution la plus simple (, la plus propre?) Consiste à "cingler" Google ou un autre serveur (ce qui n'est pas possible si le téléphone n'est pas connecté à un réseau ):
private var urlSession:URLSession = {
var newConfiguration:URLSessionConfiguration = .default
newConfiguration.waitsForConnectivity = false
newConfiguration.allowsCellularAccess = true
return URLSession(configuration: newConfiguration)
}()
public func canReachGoogle() -> Bool
{
let url = URL(string: "https://8.8.8.8")
let semaphore = DispatchSemaphore(value: 0)
var success = false
let task = urlSession.dataTask(with: url!)
{ data, response, error in
if error != nil
{
success = false
}
else
{
success = true
}
semaphore.signal()
}
task.resume()
semaphore.wait()
return success
}
Si vous craignez que le serveur ne soit en panne ou bloque votre IP, vous pouvez toujours envoyer une requête ping à plusieurs serveurs de la même manière et indiquer si certains d'entre eux sont accessibles. Ou demandez à quelqu'un de configurer un serveur dédié uniquement à cette fin.