检测应用是否通过推送通知启动/打开

Question

是否可以知道应用程序是否从消息推送中启动/打开？

我想发射活动可以在这里捕捉到：

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

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

    }
}

然而，当应用程序处于后台时，如何从推送通知中检测到它被打开？

Answer 1

我们遇到的问题是在应用程序启动后正确更新视图。这里有一系列复杂的生命周期方法，令人困惑。

生命周期方法

我们对iOS 10的测试揭示了各种情况下的以下一系列生命周期方法：

DELEGATE METHODS CALLED WHEN OPENING APP

    Opening app when system killed or user killed
        didFinishLaunchingWithOptions
        applicationDidBecomeActive

    Opening app when backgrounded
        applicationWillEnterForeground
        applicationDidBecomeActive

DELEGATE METHODS CALLED WHEN OPENING PUSH

    Opening push when system killed
        [receiving push causes didFinishLaunchingWithOptions (with options) and didReceiveRemoteNotification:background]
        applicationWillEnterForeground
        didReceiveRemoteNotification:inactive
        applicationDidBecomeActive

    Opening push when user killed
        didFinishLaunchingWithOptions (with options)
        didReceiveRemoteNotification:inactive [only completionHandler version]
        applicationDidBecomeActive

    Opening push when backgrounded
        [receiving push causes didReceiveRemoteNotification:background]
        applicationWillEnterForeground
        didReceiveRemoteNotification:inactive
        applicationDidBecomeActive

问题所在

好的，那么现在我们需要：

1. 确定用户是否正在通过推送打开应用

棘手的一点是，更新视图必须在应用程序实际处于活动状态时进行，这在所有情况下都是相同的生命周期方法。

我们解决方案的草图

以下是我们解决方案的主要组成部分：

1. 在AppDelegate上存储一个notificationUserInfo实例变量

解释

当从push打开时，didFinishLaunchingWithOptions或应用程序WillEnter前台总是在DidReceiveMemotentification:inactive之前立即调用，因此我们首先在这些方法中重置notificationUserInfo，这样就不会出现过时状态。然后，如果调用了didReceiveMotonification:inactive，我们知道我们是从推送中打开的，所以我们设置了self。notificationUserInfo，然后被ApplicationIDBecomeActive拾取，以将用户转发到右侧视图。

最后一种情况是，如果用户在应用切换器中打开应用程序（即在应用程序位于前台时双击home按钮），然后接收消息推送。在这种情况下，仅调用didReceiveRemote teNotify： inactive，并且既不调用WillEnterprise Foreground也不调用didFinishLaunding，因此您需要一些特殊状态来处理该情况。

希望这有帮助。

Answer 2

虽然晚了，但可能有用

当应用程序未运行时

-（BOOL）application:（UIApplication*）application did finishlaunchingwithoptions:（NSDictionary*）launchOptions

叫做。。

您需要检查推送通知的位置

NSDictionary *notification = [launchOptions objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey];
if (notification) {
    NSLog(@"app recieved notification from remote%@",notification);
    [self application:application didReceiveRemoteNotification:notification];
} else {
    NSLog(@"app did not recieve notification");
}

Answer 3

请参见以下代码：

- (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
    }
}

等同于

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