应用程序在使用BKProcessAssertion进行远程推送时崩溃

Question

我整合了最新版本的Google AnalyticsSDK.我在我的应用程序中使用静默通知.所以我需要一点时间来完成后台任务(大约30秒).我看到许多崩溃与允许的时间有关.

My App[3114] has active assertions beyond permitted time: 
{(
    <BKProcessAssertion: 0x15699c00> identifier: Background Content Fetching (15) process: MyApp [3114] permittedBackgroundDuration: 30.000000 reason: backgroundContentFetching owner   
    pid:3101 preventSuspend  preventThrottleDownUI  preventIdleSleep  preventSuspendOnSleep 
)}

我看到应用程序在[GAI threadMain]上崩溃了以下堆栈:

Thread 2:
0   libsystem_kernel.dylib          0x3b47ca58 mach_msg_trap + 20
1   libsystem_kernel.dylib          0x3b47c854 mach_msg + 44
2   CoreFoundation                  0x3074c896 __CFRunLoopServiceMachPort + 150
3   CoreFoundation                  0x3074afbc __CFRunLoopRun + 780
4   CoreFoundation                  0x306b5f0a CFRunLoopRunSpecific + 518
5   CoreFoundation                  0x306b5cee CFRunLoopRunInMode + 102
6   Foundation                      0x310a81e6 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 250
7   Foundation                      0x310f909c -[NSRunLoop(NSRunLoop) run] + 76
8   MyApp                           0x0016df5c +[GAI threadMain:] + 60
9   Foundation                      0x3116aa5a __NSThread__main__ + 1058
10  libsystem_pthread.dylib         0x3b4f8916 _pthread_body + 138
11  libsystem_pthread.dylib         0x3b4f8886 _pthread_start + 98
12  libsystem_pthread.dylib         0x3b4f6aa0 thread_start + 4

我认为崩溃与Google Analytics有关,我尝试在远程推送时关闭Google Analytics,如下所示:

  - (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
    fetchCompletionHandler:(BackgroundFetchResultBlock)completionHandler {
  ...
  [GAI sharedInstance].optOut = YES;

但它没有帮助.

Answer 1

请参阅此答案。简而言之，问题在于您的后台任务运行时间超过了允许的时间。iOS6以来允许的后台时间显着缩短；您可能需要重新审视您的设计并进行调整。