在iOS中的应用程序处于后台时发送Google Analytics事件

Question

当您将iOS应用程序移至后台时发送事件时，Google Analytics的行为如何？这些事件是否能够提供服务？我们是否需要专门调用[[GAI sharedInstance] dispatch];在那些情况下？

Answer 1

首先，你绝对可以做你的建议，以：

[[GAI sharedInstance] dispatch]; 

上有谷歌Analytics（分析）背景第二调度here，基本上给你这个方法：

// This method sends any queued hits when the app enters the background. 
- (void)sendHitsInBackground { 
    __block BOOL taskExpired = NO; 

    __block UIBackgroundTaskIdentifier taskId = 
    [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{ 
    taskExpired = YES; 
    }]; 

    if (taskId == UIBackgroundTaskInvalid) { 
    return; 
    } 

    __weak AppDelegate *weakSelf = self; 
    self.dispatchHandler = ^(GAIDispatchResult result) { 
    // Send hits until no hits are left, a dispatch error occurs, or 
    // the background task expires. 
    if (result == kGAIDispatchGood && !taskExpired) { 
     [[GAI sharedInstance] dispatchWithCompletionHandler:weakSelf.dispatchHandler]; 
    } else { 
     [[UIApplication sharedApplication] endBackgroundTask:taskId]; 
    } 
    }; 

    [[GAI sharedInstance] dispatchWithCompletionHandler:self.dispatchHandler]; 
} 

覆盖applicationDidEnterBackground ，如下所示：

- (void)applicationDidEnterBackground:(UIApplication *)application { 
    [self sendHitsInBackground]; 
} 

and overri de applicationWillEnterForeground，像这样：

- (void)applicationWillEnterForeground:(UIApplication *)application { 
    // Restores the dispatch interval because dispatchWithCompletionHandler 
    // has disabled automatic dispatching. 
    [GAI sharedInstance].dispatchInterval = 120; 
}