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，如下代码...我还使用内容可用性 = 1 来检测后台模式

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

推送即将到来，并在应用程序处于活动状态或始终处于后台模式时在此处执行 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程序是否从通知中启动，

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

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

    }
}

如果您的应用在后台，则不会调用此方法。为此，您可以使用这种方式检查另一种方法，

- (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！