7
我使用一個UIWebView來播放YouTube視頻我的iOS應用程序，iOS版7.1發佈之後，我得到了很多下列崩潰報告：MediaPlayer的崩潰
Exception Type: EXC_CRASH (SIGSEGV)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Triggered by Thread: 1
Thread 0:
0 libobjc.A.dylib 0x393dd637 objc_msgSend + 23
1 Foundation 0x2f563d57 +[NSConcreteNotification newTempNotificationWithName:object:userInfo:] + 119
2 Foundation 0x2f563ca9 -[NSNotificationCenter postNotificationName:object:userInfo:] + 45
3 Foundation 0x2f5685c3 -[NSNotificationCenter postNotificationName:object:] + 27
4 MediaPlayer 0x2feb17b9 __53-[MPAVItem _playerItemNewAccessLogEntryNotification:]_block_invoke + 69
5 libdispatch.dylib 0x398bcd51 _dispatch_call_block_and_release + 9
6 libdispatch.dylib 0x398bcd3d _dispatch_client_callout + 21
7 libdispatch.dylib 0x398bf6bf _dispatch_main_queue_callback_4CF + 275
8 CoreFoundation 0x2ec0d675 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 5
9 CoreFoundation 0x2ec0bf41 __CFRunLoopRun + 1305
10 CoreFoundation 0x2eb767a5 CFRunLoopRunSpecific + 521
11 CoreFoundation 0x2eb76587 CFRunLoopRunInMode + 103
12 GraphicsServices 0x33ad36cf GSEventRunModal + 135
13 UIKit 0x314d588d UIApplicationMain + 1133
14 myApp 0x000eb679 0xe7000 + 18041
15 myApp 0x000eb5c4 0xe7000 + 17860
Thread 1 Crashed:
0 libsystem_kernel.dylib 0x39975804 kevent64 + 24
1 libdispatch.dylib 0x398c4051 _dispatch_mgr_invoke + 229
2 libdispatch.dylib 0x398be2df _dispatch_mgr_thread + 35
也許OS是試圖將通知發佈到不存在的對象。我沒有直接使用MBAVItem，所以應該在UIWebview播放YouTube視頻時調用它。根據iTunes連接，這次崩潰發生在iOS 7.1（至少現在），併成爲最頻繁的崩潰。
在相同的情況下，這裏同樣的症狀。在Xcode下運行，我得到：'*** - [MPAVItem retain]：發送到釋放實例0x17a7b1720的消息' – JLundell