IOS 6.0 下 在输入中文时 按下锁屏键 导致的闪退问题

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1. - (void)applicationDidEnterBackground:(UIApplication *)application {  
2.    
3. UIDevice * device = [UIDevice currentDevice];  
4.     BOOL backgroundSupported = NO;  
5.     if ([device respondsToSelector:@selector(isMultitaskingSupported)]) {  
6.         backgroundSupported = device.multitaskingSupported;  
7.     }  
8.         
9.     __block UIBackgroundTaskIdentifier backgroundTask;  
10.         
11.     if (backgroundSupported) {  
12.         backgroundTask = [application beginBackgroundTaskWithExpirationHandler:^{  
13.             [application endBackgroundTask:backgroundTask];  
14.             backgroundTask = UIBackgroundTaskInvalid;  
15.         }];  
16.     }  
17.    
18.    
19. }  

转载于:https://www.cnblogs.com/zsw-1993/archive/2013/04/02/4880230.html