iOS小demo之无限后台

转自：点击打开链接首先需要配置Info－Plist文件，在里面新建一个Required background modes。这个是一个数组，在下面添加如下内容：App provides Voice over IP services（VOIP）App plays audio or streams audio/video using AirPlay（audio）App processes Newsstand Kit downloads（newsstand-content）App communicates using CoreBluetooth（

bluetooth-central

）App shares data using CoreBluetooth（

bluetooth-peripheral

）App registers for location updates（location）添加完成后，在- (void)applicationDidEnterBackground:(UIApplication *)application里面添加如下代码添加完成后，在- (void)applicationDidEnterBackground:(UIApplication *)application里面添加如下代码__block UIBackgroundTaskIdentifier background_task;background_task = [application beginBackgroundTaskWithExpirationHandler:^ {[application endBackgroundTask: background_task];background_task = UIBackgroundTaskInvalid;}];dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{while(TRUE){[NSThread sleepForTimeInterval:1];//编写执行任务代码}[application endBackgroundTask: background_task];background_task = UIBackgroundTaskInvalid;});