进程有超过允许时间 iOS 的活动断言

Posted 2023-03-15

【中文标题】进程有超过允许时间 iOS 的活动断言

【英文标题】：Process has active assertions beyond permitted time iOS

【发布时间】：2014-12-04 13:22:33

【问题描述】：

我有一个使用 Cordova 构建的应用程序，它在后台有一些任务。问题是我遇到随机崩溃，我无法弄清楚它出了什么问题。

我得到下一个异常：

Exception Type:  00000020
Exception Codes: 0x000000008badf00d
Highlighted Thread:  2

Application Specific Information:
<BKNewProcess: 0x1758f950; com.app; pid: 2675; hostpid: -1> has active assertions beyond permitted time: 
(
    <BKProcessAssertion: 0x17692970> id: 2675-CA057A50-06BF-4BA1-9F0C-7641112B945E name: Called by MyApp, from unknown method process: <BKNewProcess: 0x1758f950; gbi.cro; pid: 2675; hostpid: -1> permittedBackgroundDuration: 180.000000 reason: finishTask owner pid:2675 preventSuspend  preventIdleSleep  preventSuspendOnSleep ,
    <BKProcessAssertion: 0x17697c30> id: 2675-A03FFC10-1D0A-4BDC-BF64-61358346530E name: Called by MyApp, from unknown method process: <BKNewProcess: 0x1758f950; gbi.cro; pid: 2675; hostpid: -1> permittedBackgroundDuration: 180.000000 reason: finishTask owner pid:2675 preventSuspend  preventIdleSleep  preventSuspendOnSleep 
)

线程2是：

Thread 2 name:  com.apple.NSURLConnectionLoader
Thread 2:
0   libsystem_kernel.dylib          0x30ae3518 mach_msg_trap + 20
1   libsystem_kernel.dylib          0x30ae330c mach_msg + 36
2   CoreFoundation                  0x227d1596 __CFRunLoopServiceMachPort + 142
3   CoreFoundation                  0x227cfb5c __CFRunLoopRun + 1012
4   CoreFoundation                  0x2271cb2c CFRunLoopRunSpecific + 472
5   CoreFoundation                  0x2271c93e CFRunLoopRunInMode + 102
6   CFNetwork                       0x222d178a +[NSURLConnection(Loader) _resourceLoadLoop:] + 482
7   Foundation                      0x2351e996 __NSThread__main__ + 1114
8   libsystem_pthread.dylib         0x30b75e64 _pthread_body + 136
9   libsystem_pthread.dylib         0x30b75dd6 _pthread_start + 114
10  libsystem_pthread.dylib         0x30b73b80 thread_start + 4

我有完整的踪迹，但它太大了，所以如果有人需要一些信息，请告诉我。

谢谢

【问题讨论】：

你试过用断点跟踪它们吗？

嗨，问题是崩溃是随机的，也许我在 10 分钟后得到它......在 5 小时后......所以我无法用断点调试它。

【参考方案1】：

这个问题很烦人，很难通过断点调试，我建议你在应用退出活动时尝试以下方法，以向系统申请更多时间：

__block UIBackgroundTaskIdentifier backgroundTaskIdentifier = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^

    [[UIApplication sharedApplication] endBackgroundTask:backgroundTaskIdentifier];
    backgroundTaskIdentifier = backgroundTaskIdentifier;
];

另外，看看苹果： http://developer.apple.com/library/ios/#documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/BackgroundExecution/BackgroundExecution.html