在iOS 12中,您只需使用 NWPathMonitor ,它是一行代码(示例)。
出于历史目的:
我正在尝试将 网络连接 检测集成到我的应用程序中,但是由于没有检测到/将我的网络更改未打印/打印到控制台中,因此我似乎犯了一个错误。
正如文章中提到的,我目前正在使用以下这些类和工具来完成工作:
{.h, .m}
NSNotificationCenter
码
在 AppDelegate.Swift中 ,我设置了NSNotificationCenter来检测更改:
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool { // ... // A: Checks if the device is connected to the internet var defaultCenter: Void = NSNotificationCenter().addObserver(self, selector:"checkForReachability", name: kReachabilityChangedNotification, object: nil)
}
在同一个类中AppDelegate,我还创建了此函数,以便在发生任何更改时触发该函数:
AppDelegate
func checkForReachability () { var networkReachability = Reachability.reachabilityForInternetConnection() networkReachability.startNotifier() var remoteHostStatus = networkReachability.currentReachabilityStatus() if (remoteHostStatus.value == NotReachable.value) { println("Not Reachable") } else if (remoteHostStatus.value == ReachableViaWiFi.value) { println("Reachable via Wifi") } else { println("Reachable") } }
但是,当使用Network Link Conditioner操纵和模拟条件变化时,我无法在控制台中看到任何变化。任何帮助都会膨胀!
您必须先创建一个“可达性”对象, 然后 才能接收来自它的通知。另外,请确保startNotifier()在创建的Reachability对象上调用该方法。这将是一个如何在您的应用程序委托内部执行此操作的示例:
startNotifier()
class AppDelegate: UIResponder, UIApplicationDelegate { private var reachability:Reachability!; func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool { NSNotificationCenter.defaultCenter().addObserver(self, selector:"checkForReachability:", name: kReachabilityChangedNotification, object: nil); self.reachability = Reachability.reachabilityForInternetConnection(); self.reachability.startNotifier(); } @objc func checkForReachability(notification:NSNotification) { // Remove the next two lines of code. You cannot instantiate the object // you want to receive notifications from inside of the notification // handler that is meant for the notifications it emits. //var networkReachability = Reachability.reachabilityForInternetConnection() //networkReachability.startNotifier() let networkReachability = notification.object as Reachability; var remoteHostStatus = networkReachability.currentReachabilityStatus() if (remoteHostStatus.value == NotReachable.value) { println("Not Reachable") } else if (remoteHostStatus.value == ReachableViaWiFi.value) { println("Reachable via Wifi") } else { println("Reachable") } } }
我建议您看一下NSNotificationCenter和NSNotification的文档。这样,您将在下次出现类似情况时更加熟悉如何使用通知。
迅捷3
NotificationCenter.default.addObserver(self, selector:Selector(("checkForReachability:")), name: NSNotification.Name.reachabilityChanged, object: nil) let reachability: Reachability = Reachability.forInternetConnection() reachability.startNotifier()