iPhone：當msg「UIStatusBarStyleBlackTranslucent在此設備上不可用時，應用程序變爲」黑色「。顯示

Question

在我的應用程序中，我錄製視頻並播放它。大多數時候，視頻播放效果不錯，但有時在播放視頻的中間，當我在日誌中按下「完成」按鈕時「UIStatusBarStyleBlackTranslucent在此設備上不可用。」味精顯示，但它如何產生，我不知道，當這種味精生成我的應用程序變成「黑色」，我不得不從背景中刪除它。其餘的時間我的視頻很好地完美。 在我的info.plist文件中，我更改了必要的狀態欄設置，但在結果中無效。

我想提一下，我正在從iPad調試我的應用程序。

並且此msg不會每次生成。 我不知道爲什麼會顯示此消息。 下面的代碼在按下完成按鈕上運行。

- (void)moviePlaybackDidFinish:(NSNotification*)notification 
{ 
    [self stopMovie]; 
    NSLog(@"Start Timer Again"); 
    // [btnVideo setTitle:@"Start Recording" forState:UIControlStateNormal]; 
    [btnVideo setImage:[UIImage imageNamed:@"Record Button-iPad.png"] forState:UIControlStateNormal]; 
    NSURL *url = [NSURL fileURLWithPath:@"/dev/null"]; 

    NSDictionary *settings = [NSDictionary dictionaryWithObjectsAndKeys: 
           [NSNumber numberWithFloat: 44100.0],     AVSampleRateKey, 
           [NSNumber numberWithInt: kAudioFormatAppleLossless], AVFormatIDKey, 
           [NSNumber numberWithInt: 1],       AVNumberOfChannelsKey, 
           [NSNumber numberWithInt: AVAudioQualityMax],   AVEncoderAudioQualityKey, 
           nil]; 

    NSError *error; 

    if (recorder) { 
     recorder = nil; 
     [recorder release]; 
    } 
    recorder = [[AVAudioRecorder alloc] initWithURL:url settings:settings error:&error]; 

    if (recorder) { 
     [recorder prepareToRecord]; 
     recorder.meteringEnabled = YES; 
     [recorder record]; 
    } 
    NSString *str = [[NSUserDefaults standardUserDefaults] valueForKey:@"IMAGE_MOVEMENT"]; 
    NSLog(@"image movement %@",str); 
    if(str == @"EASY") 
    { 
     NSLog(@"inside easy image"); 
     [self validateTimer]; 
     levelTimer = [NSTimer scheduledTimerWithTimeInterval:0.03 target:self selector:@selector(levelTimerCallbackEasy:) userInfo:nil repeats: YES]; 
    } 
    else if(str == @"MEDIUM") 
    { 
     NSLog(@"inside medium image"); 
     [self validateTimer]; 
     levelTimerMedium = [NSTimer scheduledTimerWithTimeInterval:0.03 target:self selector:@selector(levelTimerCallbackMedium:) userInfo:nil repeats:YES]; 
    } 
    else if(str == @"HARD") 
    { 
     NSLog(@"inside hard image"); 
     [self validateTimer]; 
     levelTimerHard = [NSTimer scheduledTimerWithTimeInterval:0.03 target: self selector: @selector(levelTimerCallbackHard:) userInfo: nil repeats: YES]; 
    } 
} 

- (void)stopMovie 
{ 
     NSLog(@"Stop Movie"); 


    [[NSNotificationCenter defaultCenter] 
    removeObserver:self 
    name:MPMoviePlayerWillExitFullscreenNotification 
    object:moviePlayer]; 

    // This trick is necessary, otherwise the screen remains black or will 
    // flicker when you try to play the next video. 
    [moviePlayer pause]; 
    [moviePlayer stop]; 
    moviePlayer.initialPlaybackTime = -1.0; 

    moviePlayer = nil; 


    NSString *recorderFilePath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]; 
    recorderFilePath = [recorderFilePath stringByAppendingPathComponent:@"tempRecording.caf"]; 

    if ([[NSFileManager defaultManager] fileExistsAtPath:recorderFilePath]) { 
     [[NSFileManager defaultManager] removeItemAtPath:recorderFilePath error:nil]; 
    } 

    NSString *movieFilePath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]; 
    movieFilePath = [movieFilePath stringByAppendingPathComponent:@"export.mov"]; 

    if ([[NSFileManager defaultManager] fileExistsAtPath:movieFilePath]) { 
     [[NSFileManager defaultManager] removeItemAtPath:movieFilePath error:nil]; 
    } 

    NSString *videoFilePath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]; 
    videoFilePath = [videoFilePath stringByAppendingPathComponent:@"output.mp4"]; 

    if ([[NSFileManager defaultManager] fileExistsAtPath:videoFilePath]) { 
     [[NSFileManager defaultManager] removeItemAtPath:videoFilePath error:nil]; 
    } 

    NSURL *urls = [NSURL fileURLWithPath:recorderFilePath]; 
    NSError *err = nil; 

    if (voiceRecorder) { 
     voiceRecorder = nil; 
     [voiceRecorder release]; 
    } 

    voiceRecorder = [[ AVAudioRecorder alloc] initWithURL:urls settings:recordSetting error:&err]; 
    //[recorder setMeteringEnabled:YES]; 

    if(!voiceRecorder){ 
     NSLog(@"recorder: %@ %d %@", [err domain], [err code], [[err userInfo] description]); 
     UIAlertView *alert = 
     [[UIAlertView alloc] initWithTitle: @"Warning" 
            message: [err localizedDescription] 
            delegate: nil 
         cancelButtonTitle:@"OK" 
         otherButtonTitles:nil]; 
     [alert show]; 
     [alert release]; 
     return; 
    } 

    //prepare to record 
    [voiceRecorder setDelegate:self]; 
    [voiceRecorder prepareToRecord]; 
    //voiceRecorder.meteringEnabled = YES; 
} 

如果您有任何問題，請提供給我。

thanx提前。

Answer 1

iPad不支持UIStatusBarStyleBlackTranslucent，將其更改爲正常，您將擺脫該錯誤。可能是因爲他們認爲大屏幕並不需要額外的20個像素。