ios - didRegisterForRemoteNotificationsWithDeviceToken 调用了两次？

Question

有点类似于When is didRegisterForRemoteNotificationsWithDeviceToken called? .

当用户第一次安装应用时，提示是否接受通知，如果用户接受，是否会调用didRegisterForRemoteNotificationsWithDeviceToken？

我目前在用户成功登录或创建帐户后调用 registerForRemoteNotificationTypes。

在随后的启动中，即使没有在 AppDelegate 中调用 registerForRemoteNotificationTypes，也会调用 didRegisterForRemoteNotificationsWithDeviceToken 委托(delegate)。

如果我遵循文档和示例代码:

By requesting the device token and passing it to the provider every time your application launches, you help to ensure that the provider has the current token for the device.

- (void)applicationDidFinishLaunching:(UIApplication *)app {

   // other setup tasks here....
    [[UIApplication sharedApplication] registerForRemoteNotificationTypes:...
}

但是通过在应用启动时请求 token ，委托(delegate)将被调用两次。

几个问题和需要澄清的问题:

1. 要出现初始提示，必须调用 registerForRemoteNotificationTypes 才能显示提示？但是，如果我在 AppDelegate 中手动调用委托(delegate)，委托(delegate)将被调用两次。应该是这样吗？

2. 如果用户接受初始提示，是否会自动调用didRegisterForRemoteNotificationsWithDeviceToken？或者我们必须调用AppDelegate 中的 registerForRemoteNotificationTypes？但是，代表将在未来的发布中被调用两次？

3. 如果用户拒绝并稍后通过设置接受，会发生什么？

更新

0。要出现初始提示，必须调用 registerForRemoteNotificationTypes 才能显示提示？但是，如果我在 AppDelegate 中手动调用委托(delegate)，委托(delegate)将被调用两次。应该是这样吗？ 这不是真的。发现在 AppDelegate 中实际上有 2 个 registerForRemoteNotiicationTypes。

Answer 1

如果用户接受初始提示，是否会自动调用didRegisterForRemoteNotificationsWithDeviceToken？ 不，您的远程通知注册过程在单击“允许访问”时开始，但只有在成功注册 APNS 时才会调用 didRegisterForRemoteNotificationsWithDeviceToken 方法。

If your application has previously registered, calling registerForRemoteNotificationTypes: results in the operating system passing the device token to the delegate immediately without incurring additional overhead

You can determine whether an application is launched as a result of the user tapping the action button or whether the notification was delivered to the already-running application by examining the application state. In the delegate’s implementation of the application:didReceiveRemoteNotification: or application:didReceiveLocalNotification: method, get the value of the applicationState property and evaluate it. If the value is UIApplicationStateInactive, the user tapped the action button; if the value is UIApplicationStateActive, the application was frontmost when it received the notification.