AVAudioPlayer不斷崩潰在這條線？ （初始化）

Question

我AVAudioPlayer保持在錯誤崩潰：零線：

AVAudioRecorder *tempRecorder = [[AVAudioRecorder alloc] 
           initWithURL:nil 
           settings:nil 
           error:nil]; 

我試圖將其設置爲一個非零值，但是，它仍然保持在特定行崩潰了！

這裏的堆棧跟蹤：

#0 0x00e0ed65 in CFEqual() 
#1 0x00e69e86 in CFArrayGetFirstIndexOfValue() 
#2 0x0158cda8 in AudioFileFormatRegistry::GetTypesForExtension(__CFString const*, unsigned long*, void*)() 
#3 0x0158eb5c in AudioFileGetGlobalInfoSize() 
#4 0x00cc8e6a in -[AVAudioRecorder initWithURL:settings:error:]() 
#5 0x000033f7 in -[RecorderVC resetRecorder] at /Users/Ahmed/Documents/AudioRecorder/AudioRecorder/RecorderVC.m:52 
#6 0x000031d3 in -[RecorderVC viewDidLoad]() 
#7 0x000c4089 in -[UIViewController view]() 
#8 0x000d6f54 in -[UITabBarController transitionFromViewController:toViewController:transition:shouldSetSelected:]() 
#9 0x000d5aaa in -[UITabBarController transitionFromViewController:toViewController:]() 
#10 0x000d78a2 in -[UITabBarController _setSelectedViewController:]() 
#11 0x000d7d5e in -[UITabBarController viewWillLayoutSubviews]() 
#12 0x001e82e9 in -[UILayoutContainerView layoutSubviews]() 
#13 0x017e1a5a in -[CALayer layoutSublayers]() 
#14 0x017e3ddc in CALayerLayoutIfNeeded() 
#15 0x017890b4 in CA::Context::commit_transaction(CA::Transaction*)() 
#16 0x0178a294 in CA::Transaction::commit()() 
#17 0x000169c9 in -[UIApplication _reportAppLaunchFinished]() 
#18 0x00016e83 in -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:]() 
#19 0x00021617 in -[UIApplication handleEvent:withNewEvent:]() 
#20 0x00019abf in -[UIApplication sendEvent:]() 
#21 0x0001ef2e in _UIApplicationHandleEvent() 
#22 0x01130992 in PurpleEventCallback() 
#23 0x00ed8944 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__() 
#24 0x00e38cf7 in __CFRunLoopDoSource1() 
#25 0x00e35f83 in __CFRunLoopRun() 
#26 0x00e35840 in CFRunLoopRunSpecific() 
#27 0x00e35761 in CFRunLoopRunInMode() 
#28 0x000167d2 in -[UIApplication _run]() 
#29 0x00022c93 in UIApplicationMain() 
#30 0x00002a39 in main() 

Answer 1

您不能通過nil爲initWithURL:。參見：

http://developer.apple.com/library/ios/#documentation/AVFoundation/Reference/AVAudioRecorder_ClassReference/Reference/Reference.html