请求获得推送操作的权限

Question

我想在用户按下ViewController中的按钮后才询问用户的权限。我怎么能这样做？

在应用程序启动后的代码对话框弹出窗口中。我无法在除AppDelegate类之外的任何地方执行 application.registerUserNotificationSettings （我总是遇到错误）。

AppDelegate.swift：

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

    // Notifications
    let notificationType = UIUserNotificationType.Alert
    let settings = UIUserNotificationSettings(forTypes: notificationType, categories: nil)
    application.registerUserNotificationSettings(settings) // <-- that method popups dialog to allow/decline Push

    // Override point for customization after application launch.
    return true
}

Answer 1

您可以在任意位置使用：

UIApplication.sharedApplication().registerUserNotificationSettings(settings)