ios - 注册推送通知功能不会被调用

Question

我正在制作这个需要推送通知的甜蜜应用程序。

但是，当尝试获取 Push token 时，似乎并非所有必需的功能都被执行。

用户确实收到此警报:

当用户点击“确定”时，我单步执行代码，发现并非所有内容都被执行:

override func viewDidLoad(){
    let tapper = UITapGestureRecognizer(target: view, action:#selector(UIView.endEditing))
    tapper.cancelsTouchesInView = false
    view.addGestureRecognizer(tapper)
    
    print("gets called")
    registerForPushNotifications(UIApplication.sharedApplication())
}

func registerForPushNotifications(application: UIApplication) {
    print("gets called")
    let notificationSettings = UIUserNotificationSettings(
        forTypes: [.Badge, .Sound, .Alert], categories: nil)
    application.registerUserNotificationSettings(notificationSettings)
}

func application(application: UIApplication, didRegisterUserNotificationSettings notificationSettings: UIUserNotificationSettings) {
    print("doesn't get called")
    if notificationSettings.types != .None {
        application.registerForRemoteNotifications()
    }
}

func application(application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: NSData) {
    print("doesn't get called")
    let tokenChars = UnsafePointer<CChar>(deviceToken.bytes)
    var apnsTokenString = ""
    
    for i in 0..<deviceToken.length {
        apnsTokenString += String(format: "%02.2hhx", arguments: [tokenChars[i]])
    }
    
    Constant.pushToken = apnsTokenString
    
    print("Device Token:", Constant.pushToken)
}

func application(application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: NSError) {
    debugPrint("Error Registering Remote Notification")
}

在我的控制台中打印以下内容:

gets called

gets called

这意味着并非所有必需的函数都被调用。我做错了什么？

Answer 1

假设您在问题中发布的所有代码都在 View Controller 类中，问题是您需要将 UIApplicationDelegate 方法放在实际的应用程序委托(delegate)类中，而不是 View Controller 类中。只需将这些方法移至适当的类，它们就会起作用。