在橫向錄製視頻始終是設備正在旋轉（橫向 - >縱向 - >橫向）

Question

即使設備旋轉（縱向 - >橫向 - >縱向），我也需要始終以橫向模式錄製視頻。

取角度很簡單，即時使用hyroscope。我的問題是始終在橫向錄製視頻。任何需要的建議。

我使用AVCaptureSession來錄製視頻。 AVMutablecomposition？我不知道該用什麼...... 請幫我，請

Answer 1

爲什麼不強制你的控制器只能在橫向模式？

你可以這樣說：

- (BOOL)shouldAutorotate 
{ 
    return YES; 
} 

-(NSUInteger)supportedInterfaceOrientations 
{ 
    return UIInterfaceOrientationMaskLandscapeRight | UIInterfaceOrientationMaskLandscapeLeft; 
} 

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation 
{ 
    return UIInterfaceOrientationLandscapeRight; 
} 

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation 
{ 
    return (interfaceOrientation == UIInterfaceOrientationLandscapeRight || interfaceOrientation == UIInterfaceOrientationLandscapeLeft); 
} 

Answer 2

你可以試試這個代碼

@implementation PortraitViewController 
- (void)awakeFromNib 
{ 
    isShowingLandscapeView = NO; 
    [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications]; 
    [[NSNotificationCenter defaultCenter] addObserver:self 
           selector:@selector(orientationChanged:) 
           name:UIDeviceOrientationDidChangeNotification 
           object:nil]; 
} 

- (void)orientationChanged:(NSNotification *)notification 
{ 
    UIDeviceOrientation deviceOrientation = [UIDevice currentDevice].orientation; 
    if (UIDeviceOrientationIsLandscape(deviceOrientation) && 
     !isShowingLandscapeView) 
    { 
     [self performSegueWithIdentifier:@"DisplayAlternateView" sender:self]; 
     isShowingLandscapeView = YES; 
    } 
    else if (UIDeviceOrientationIsPortrait(deviceOrientation) && 
      isShowingLandscapeView) 
    { 
     [self dismissViewControllerAnimated:YES completion:nil]; 
     isShowingLandscapeView = NO; 
    } 
} 

也對蘋果的文檔HERE查看詳細轉動實現的樣子。