ios - 检测从推送通知打开的应用程序(后台获取)

Question

我使用 UIBackgroundFetchResult 来捕获推送通知，如下面的代码...我还使用内容可用性 = 1 在后台模式下进行检测

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
fetchCompletionHandler:(void (^)   (UIBackgroundFetchResult))completionHandler {

推送即将到来并在应用程序处于事件状态或后台模式时始终在此处执行但是当我打开推送时，我无法检测到应用程序是否从推送中打开，因为它总是进入 if 状态

 if ( (application.applicationState == UIApplicationStateInactive || application.applicationState == UIApplicationStateBackground)  && (NotiType == 1 || NotiType == 2))
    {

}

Answer 1

您可以通过应用委托(delegate)方法检查您的应用是否从 APNS(Apple 推送通知服务)启动

application:didFinishLaunchingWithOptions:

您可以在其中检查应用是否通过通知启动，

-(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    if (launchOptions != nil) {
          // Launched from push notification
          NSDictionary *notification = [launchOptions objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey];

    }
}

如果您的应用程序在后台运行，则不会调用此方法。为此，您可以通过这种方式 checkin 另一种方法，

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
{
    if ( application.applicationState == UIApplicationStateInactive || application.applicationState == UIApplicationStateBackground  )
    {
         //opened from a push notification when the app was on background
    }
}

HTH，享受编码吧!