由于未捕获的异常“NSInternalInconsistencyException”而终止应用程序
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【中文标题】由于未捕获的异常“NSInternalInconsistencyException”而终止应用程序【英文标题】:Terminating app due to uncaught exception 'NSInternalInconsistencyException' 【发布时间】:2011-08-27 18:58:16 【问题描述】:是的,我有 5 个视图。其中一个视图称为 RecordViewController。 (RecordViewController 导致错误)我可以很好地切换视图。但是一旦我进入recordviewcontroller,我就可以切换到另一个视图。但是如果我想切换回recordviewcontroller。它把我扔出我的应用程序并给我这个错误:
2011-08-27 19:52:00.358 app[1737:707] *** Assertion failure in +[RecordViewController alloc], /Users/user/Desktop/app/Classes/RecordViewController.m:111
2011-08-27 19:52:00.373 app[1737:707] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Attempted to allocated second singleton RecordViewController'
*** Call stack at first throw:
(
0 CoreFoundation 0x36fd064f __exceptionPreprocess + 114
1 libobjc.A.dylib 0x34229c5d objc_exception_throw + 24
2 CoreFoundation 0x36fd0491 +[NSException raise:format:arguments:] + 68
3 Foundation 0x353d0573 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 62
4 app 0x00014bdd +[RecordViewController alloc] + 212
5 app 0x00013fd3 -[EffectsViewController goRecord:] + 34
6 CoreFoundation 0x36f40571 -[NSObject(NSObject) performSelector:withObject:withObject:] + 24
7 UIKit 0x35dd2ec9 -[UIApplication sendAction:to:from:forEvent:] + 84
8 UIKit 0x35dd2e69 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 32
9 UIKit 0x35dd2e3b -[UIControl sendAction:to:forEvent:] + 38
10 UIKit 0x35dd2b8d -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 356
11 UIKit 0x35dd283b -[UIControl touchesBegan:withEvent:] + 186
12 UIKit 0x35dd1bb1 -[UIWindow _sendTouchesForEvent:] + 300
13 UIKit 0x35dd156f -[UIWindow sendEvent:] + 262
14 UIKit 0x35dba313 -[UIApplication sendEvent:] + 298
15 UIKit 0x35db9c53 _UIApplicationHandleEvent + 5090
16 GraphicsServices 0x366f4e77 PurpleEventCallback + 666
17 CoreFoundation 0x36fa7a97 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 26
18 CoreFoundation 0x36fa983f __CFRunLoopDoSource1 + 166
19 CoreFoundation 0x36faa60d __CFRunLoopRun + 520
20 CoreFoundation 0x36f3aec3 CFRunLoopRunSpecific + 230
21 CoreFoundation 0x36f3adcb CFRunLoopRunInMode + 58
22 GraphicsServices 0x366f441f GSEventRunModal + 114
23 GraphicsServices 0x366f44cb GSEventRun + 62
24 UIKit 0x35de4d69 -[UIApplication _run] + 404
25 UIKit 0x35de2807 UIApplicationMain + 670
26 app 0x00002e73 main + 70
27 app 0x00002e28 start + 40
)
terminate called after throwing an instance of 'NSException'
这里是recordviewcontroller的代码
-(void)countUp
mainInt += 1;
seconds.text = [NSString stringWithFormat:@"%02d", mainInt];
-(IBAction)goBack:(id)sender;
[self dismissModalViewControllerAnimated:YES];
static RecordViewController *sharedInstance = nil;
+(RecordViewController *) sharedInstance
@synchronized([RecordViewController class])
if (!sharedInstance)
[[self alloc]init];
return sharedInstance;
return nil;
+(id) alloc
@synchronized([RecordViewController class])
NSAssert(sharedInstance == nil, @"Attempted to allocated second singleton RecordViewController");
sharedInstance = [super alloc];
return sharedInstance;
return nil;
- (id)autorelease
return self;
- (void)viewDidLoad
[super viewDidLoad];
toggle = YES;
btnPlay.hidden = YES;
AVAudiosession * audioSession = [AVAudioSession sharedInstance];
[audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error: &error];
[audioSession setActive:YES error: &error];
- (IBAction) start_button_pressed
if(toggle)
toggle = NO;
[actSpinner startAnimating];
[btnStart setImage:[UIImage imageNamed:@"recordstop.png"] forState:UIControlStateNormal];
mainInt = 0;
theTimer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(countUp) userInfo:nil repeats:YES];
btnPlay.enabled = toggle;
btnPlay.hidden = !toggle;
NSMutableDictionary* recordSetting = [[NSMutableDictionary alloc] init];
[recordSetting setValue :[NSNumber numberWithInt:kAudioFormatAppleIMA4] forKey:AVFormatIDKey];
[recordSetting setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey];
[recordSetting setValue:[NSNumber numberWithInt: 2] forKey:AVNumberOfChannelsKey];
recordedTmpFile = [NSURL fileURLWithPath:[NSTemporaryDirectory() stringByAppendingPathComponent: [NSString stringWithFormat: @"%.0f.%@", [NSDate timeIntervalSinceReferenceDate] * 1000.0, @"caf"]]];
NSLog(@"Using File called: %@",recordedTmpFile);
recorder = [[ AVAudioRecorder alloc] initWithURL:recordedTmpFile settings:recordSetting error:&error];
[recorder setDelegate:self];
[recorder prepareToRecord];
[recorder record];
else
toggle = YES;
[actSpinner stopAnimating];
[btnStart setImage:[UIImage imageNamed:@"recordrecord.png"] forState:UIControlStateNormal];
btnPlay.enabled = toggle;
btnPlay.hidden = !toggle;
[theTimer invalidate];
NSLog(@"Using File called: %@",recordedTmpFile);
[recorder stop];
- (void)didReceiveMemoryWarning
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
-(IBAction) play_button_pressed
AVAudioPlayer * avPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:recordedTmpFile error:&error];
[avPlayer prepareToPlay];
[avPlayer play];
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationLandscapeLeft || interfaceOrientation == UIInterfaceOrientationLandscapeRight);
- (void)viewDidUnload
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
//Clean up the temp file.
NSFileManager * fm = [NSFileManager defaultManager];
[fm removeItemAtPath:[recordedTmpFile path] error:&error];
//Call the dealloc on the remaining objects.
[recorder dealloc];
recorder = nil;
recordedTmpFile = nil;
- (void)dealloc
[super dealloc];
@end
谢谢
【问题讨论】:
【参考方案1】:RecordViewController 被声明为单例 (Apple docs on Singletons)。拥有一个单例视图控制器永远不会真正有意义,但我将忽略它并简单地帮助您。
您收到该异常的原因是您调用了两次[RecordViewController alloc]
。它应该只被调用一次,因为它是一个单例。
要解决此问题,您需要在每次想要与班级互动时调用[RecordViewController sharedInstance]
,而不是像您可能习惯的那样调用[[RecordViewController alloc] init]
。
【讨论】:
Recordviewcontroller,上面有一个录音机 - 我正在使用单例,因为这允许我在录音时切换视图。那么我需要删除或调用我的代码的哪一部分?谢谢 我无法具体说明您需要修改代码的位置,但查看异常我可以看到 [EffectsViewController goRecord] 内部有一个地方只需检查您的代码并替换 [[RecordViewController alloc] init] 与 [RecordViewController sharedInstance] 好的,我已经改变了。但是现在当我尝试继续它时,我得到'程序接收信号:“EXC_BAD_ACCESS”。数据格式化程序暂时不可用,将在“继续”后重试。 (正在调试的程序在从 GDB 调用的函数中发出信号。GDB 已将上下文恢复到调用前的状态。要更改此行为,请使用“set unwindonsignal off” 对包含函数 (gdb_objc_startDebuggerMode) 的表达式的评估将是放弃。)' :( 发生这种情况的原因有很多。我建议尝试解决程序中的所有内存泄漏,而不是专注于让这个类正确。提示是在“产品”菜单项中使用“分析”,该实用程序将检查您的所有代码并通知您可能做错的事情。之后在 Instruments (Product->Profile) 中查看应用程序并使用“Leaks”工具。以上是关于由于未捕获的异常“NSInternalInconsistencyException”而终止应用程序的主要内容,如果未能解决你的问题,请参考以下文章
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