Iphone 由于未捕获异常而终止应用程序'；n内部一致性异常'；

对，我有5种观点。其中一个视图称为RecordViewController。（RecordViewController导致错误）我可以很好地切换视图。但一旦进入recordviewcontroller，我就可以切换到另一个视图。但如果我想切换回recordviewcontroller。它将我从我的应用程序中抛出，并导致以下错误：

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'

以下是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

RecordViewController被声明为单例（）。拥有一个单例视图控制器是没有意义的，但我将忽略这一点，只是帮助您

出现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，您需要在每次希望与类交互时调用

[RecordViewController sharedInstance]

，而不是像您可能习惯的那样调用

[[RecordViewController alloc]init]

Recordviewcontroller上有一个语音记录器-我使用的是singleton，因为它允许我在语音记录录制时切换视图。那么，我需要删除或调用代码的哪一部分？谢谢，我不能具体说明您需要修改代码的位置，但查看例外情况，我可以看到[EffectsViewController goRecord]中有一个位置，只需检查您的代码并将[[RecordViewController alloc]init]替换为[RecordViewController sharedInstance]好的，我已经更改了。但现在，当我尝试进入它时，我得到了“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之前的状态。若要更改此行为，请使用“set UnwindSignal off”（设置UnwindSignal off），将放弃对包含该函数的表达式（GDB_objc_startDebuggerMode）的求值。）：（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问题，而不是将重点放在正确使用此类上。提示是在“产品”中使用“分析”菜单项，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。