IOS 後台無限執行任務

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IOS 後台無限執行任務

找到一些關於ios後台可以繼續執行任務的相關代碼,分享一下:

 

 

首先需要配置Info-Plist檔案,在裡面建立一個Required background modes。這個是一個數組,在下面添加如下內容:

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)

添加完成後,在- (void)applicationDidEnterBackground:(UIApplication *)application裡面添加如下代碼

 

  1. __block UIBackgroundTaskIdentifier background_task;
  2. background_task = [application beginBackgroundTaskWithExpirationHandler:^ { [application endBackgroundTask: background_task];
  3. background_task = UIBackgroundTaskInvalid; }];
  4. dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
  5. while(TRUE) {
  6. [NSThread sleepForTimeInterval:1];
  7. //編寫執行任務代碼
  8. }
  9. [application endBackgroundTask: background_task]; background_task = UIBackgroundTaskInvalid;
  10. });

     

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