如何在點擊本地通知時確定后台應用程序成為前台

Question

蘋果醫生在后台獲得用戶的關注說

通知是掛起，處於后台或未運行的應用程序引起用戶注意的一種方式。

由於區域監視，我的應用被iOS喚醒，並is in the background並發布本地通知。 用戶點擊通知，應用將處於前台。

如何確定應用程序由於用戶點擊通知而進入前台？

哪個委托方法將包含通知信息。

didFinishLaunchingWithOption or didReceiveLocalNotification

Answer 1

如果您的應用程序在后台運行，並且在LocalNotification Banner上點擊，則將被調用以下方法：

-(void) application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification

在iOS 8之后：

- (void)application:(UIApplication *)application handleActionWithIdentifier:(NSString *)identifier forLocalNotification:(UILocalNotification *)notification completionHandler:(void(^)())completionHandler

如果應用未在后台運行，您將在以下位置收到通知：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
if ([launchOptions valueForKey:@"UIApplicationLaunchOptionsLocalNotificationKey"]) {
 // here you will get
}

Answer 2

您可以在觸發UILocalNotification並檢測是否調用了-（void）application：（UIApplication *）application didReceiveLocalNotification：（UILocalNotification *）notification時檢測到您的應用程序的狀態，以確保接收到本地通知。

- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification {
    UIApplicationState state = [application applicationState];
    if (state == UIApplicationStateInactive) {
        // Application was in the background when notification was delivered.
    } else {

    }
}

Answer 3

您可以通過使用application.applicationState確定

 if(application.applicationState == UIApplicationStateInactive)
     {
           NSLog(@" Inactive");
      // when you tapping on notification

     }
    else if (application.applicationState == UIApplicationStateBackground)
    {
           NSLog(@" background");
    }
    else
    {
          NSLog(@" Active");

    }