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AVCaptureVideoPreviewLayerの向き-横向きが必要

私のアプリは横向きのみです。次のようなAVCaptureVideoPreviewLayerを提示しています。

self.previewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:session];
[self.previewLayer setBackgroundColor:[[UIColor blackColor] CGColor]];
[self.previewLayer setVideoGravity:AVLayerVideoGravityResizeAspect];                    
NSLog(@"previewView: %@", self.previewView);
CALayer *rootLayer = [self.previewView layer];
[rootLayer setMasksToBounds:YES];
[self.previewLayer setFrame:[rootLayer bounds]];
    NSLog(@"previewlayer: %f, %f, %f, %f", self.previewLayer.frame.Origin.x, self.previewLayer.frame.Origin.y, self.previewLayer.frame.size.width, self.previewLayer.frame.size.height);
[rootLayer addSublayer:self.previewLayer];
[session startRunning];

self.previewViewのフレームは（0,0,568,320）であり、これは正しいです。 self.previewLayerは（0,0,568,320）のフレームを記録しますが、これは理論的には正しいです。ただし、カメラディスプレイは横長画面の中央に縦長の長方形として表示され、カメラプレビューイメージの向きが90度間違っています。何が間違っていますか？カメラプレビューレイヤーを全画面表示、横長モードで表示する必要があり、画像の向きを正しく設定する必要があります。

iosorientationavfoundationavcapturesessionavcapture
56
soleil

デフォルトのカメラの向きは、Landscape Left（ホームボタン1つ左）です。ここで2つのことを行う必要があります。

1- previewLayerフレームを次のように変更します。

self.previewLayer.frame=self.view.bounds;

画面が回転するとプレビューレイヤーのフレームが変更されるように、プレビューレイヤーフレームを画面の境界に設定する必要があります（ルートビューのフレームは使用できません。行う）。この例では、previewlayerフレームをpreviewViewプロパティに設定していますが、これは表示されていません。

2-プレビューレイヤー接続をデバイスの回転に合わせて回転させる必要があります。このコードをviewDidAppearに追加します。

-(void) viewDidAppear:(BOOL)animated
{
  [super viewDidAppear:YES];

  //Get Preview Layer connection
  AVCaptureConnection *previewLayerConnection=self.previewLayer.connection;

  if ([previewLayerConnection isVideoOrientationSupported])
    [previewLayerConnection setVideoOrientation:[[UIApplication sharedApplication] statusBarOrientation]]; 
}

これで解決することを願っています。

完全な開示：これは簡略化されたバージョンです。横向きか横向きかは関係ありません。

64
Khaled Barazi

Swift 3.0およびXCODE 8.0のベストアンサー

private func updatePreviewLayer(layer: AVCaptureConnection, orientation: AVCaptureVideoOrientation) {

    layer.videoOrientation = orientation

    previewLayer.frame = self.view.bounds

}

override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()

    if let connection =  self.previewLayer?.connection  {

        let currentDevice: UIDevice = UIDevice.current

        let orientation: UIDeviceOrientation = currentDevice.orientation

        let previewLayerConnection : AVCaptureConnection = connection

        if previewLayerConnection.isVideoOrientationSupported {

            switch (orientation) {
            case .portrait: updatePreviewLayer(layer: previewLayerConnection, orientation: .portrait)

                break

            case .landscapeRight: updatePreviewLayer(layer: previewLayerConnection, orientation: .landscapeLeft)

                break

            case .landscapeLeft: updatePreviewLayer(layer: previewLayerConnection, orientation: .landscapeRight)

                break

            case .portraitUpsideDown: updatePreviewLayer(layer: previewLayerConnection, orientation: .portraitUpsideDown)

                break

            default: updatePreviewLayer(layer: previewLayerConnection, orientation: .portrait)

                break
            }
        }
    }
}

Swift 2.2 AND XCODE 7.

private func updatePreviewLayer(layer: AVCaptureConnection, orientation: AVCaptureVideoOrientation) {

    layer.videoOrientation = orientation

    previewLayer.frame = self.view.bounds

}

override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()

    if let connection =  self.previewLayer?.connection  {

        let currentDevice: UIDevice = UIDevice.currentDevice()

        let orientation: UIDeviceOrientation = currentDevice.orientation

        let previewLayerConnection : AVCaptureConnection = connection

        if (previewLayerConnection.supportsVideoOrientation) {

            switch (orientation) {
            case .Portrait: updatePreviewLayer(previewLayerConnection, orientation: .Portrait)

                break

            case .LandscapeRight: updatePreviewLayer(previewLayerConnection, orientation: .LandscapeLeft)

                break

            case .LandscapeLeft: updatePreviewLayer(previewLayerConnection, orientation: .LandscapeRight)

                break

            case .PortraitUpsideDown: updatePreviewLayer(previewLayerConnection, orientation: .PortraitUpsideDown)

                break

            default: updatePreviewLayer(previewLayerConnection, orientation: .Portrait)

                break
            }
        }
    }
}
65
Maselko
override func viewWillTransitionToSize(size: CGSize, withTransitionCoordinator coordinator: UIViewControllerTransitionCoordinator) {
    super.viewWillTransitionToSize(size, withTransitionCoordinator: coordinator)
    if let connection = self.previewLayer?.connection {
        var currentDevice: UIDevice = UIDevice.currentDevice()
        var orientation: UIDeviceOrientation = currentDevice.orientation
        var previewLayerConnection : AVCaptureConnection = connection

        if (previewLayerConnection.supportsVideoOrientation) {
            switch (orientation) {
            case .portrait:
                previewLayerConnection.videoOrientation = AVCaptureVideoOrientation.portrait
            case .landscapeRight:
                previewLayerConnection.videoOrientation = AVCaptureVideoOrientation.landscapeRight
            case .landscapeLeft:
                previewLayerConnection.videoOrientation = AVCaptureVideoOrientation.landscapeLeft
            case .portraitUpsideDown:
                previewLayerConnection.videoOrientation = AVCaptureVideoOrientation.portraitUpsideDown

            default:
                previewLayerConnection.videoOrientation = AVCaptureVideoOrientation.portrait
            }
        }
    }
}
27
Janusz Chudzynski

使えない

[previewLayerConnection setVideoOrientation:[[UIApplication sharedApplication] statusBarOrientation]];

なぜならUIInterfaceOrientation != AVCaptureVideoOrientation

しかし、次のコードで値をテストするだけです...

-(void)viewDidLayoutSubviews {
    [super viewDidLayoutSubviews];

    UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
    switch (orientation) {
        case UIInterfaceOrientationPortrait:
            [_videoPreviewLayer.connection setVideoOrientation:AVCaptureVideoOrientationPortrait];
            break;
        case UIInterfaceOrientationPortraitUpsideDown:
            [_videoPreviewLayer.connection setVideoOrientation:AVCaptureVideoOrientationPortraitUpsideDown];
            break;
        case UIInterfaceOrientationLandscapeLeft:
            [_videoPreviewLayer.connection setVideoOrientation:AVCaptureVideoOrientationLandscapeLeft];
            break;
        case UIInterfaceOrientationLandscapeRight:
            [_videoPreviewLayer.connection setVideoOrientation:AVCaptureVideoOrientationLandscapeRight];
            break;
    }
}
16
Emmanuel Crombez

APIは多少変更されたようです。 videoOrientationは、プレビューレイヤーのconnectionプロパティのプロパティになりました。さらに、スイッチを使用する必要はありません。 Swift 3.0：

override func viewDidLayoutSubviews() {
    self.configureVideoOrientation()
}

private func configureVideoOrientation() {
    if let previewLayer = self.previewLayer,
        let connection = previewLayer.connection {
        let orientation = UIDevice.current.orientation

        if connection.isVideoOrientationSupported,
            let videoOrientation = AVCaptureVideoOrientation(rawValue: orientation.rawValue) {
            previewLayer.frame = self.view.bounds
            connection.videoOrientation = videoOrientation
        }
    }
}
12
John Rogers

フル機能のカメラプレビューに苦労している人向け。これが製品コードです。もちろん、欠点は向きが変わるときの遅れです。誰かがこれを克服するためのより良い解決策を持っている場合は共有してください

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self initCamera];
}

- (void)initCamera
{
    AVCaptureDeviceInput *captureInput = [AVCaptureDeviceInput deviceInputWithDevice:[AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo] error:nil];
    if (captureInput) {
        mSession = [[AVCaptureSession alloc] init];
        [mSession addInput:captureInput];
    }
}

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{
    [super didRotateFromInterfaceOrientation:fromInterfaceOrientation];
    if ([mSession isRunning]) {
        [mSession stopRunning];
        [mCameraLayer removeFromSuperlayer];

        [self initCamera];

        [self startCamera];
    }
}

- (void)startCamera
{
    [mSession startRunning];
    Settings::getInstance()->setClearColor(Color(0, 0, 0, 0));
    mCameraLayer = [AVCaptureVideoPreviewLayer layerWithSession: mSession];
    [self updateCameraLayer];
    [mCameraView.layer addSublayer:mCameraLayer];
}

- (void)stopCamera
{
    [mSession stopRunning];
    [mCameraLayer removeFromSuperlayer];
    Settings::getInstance()->setDefClearColor();
}

- (void)toggleCamera
{
    mSession.isRunning ? [self stopCamera] : [self startCamera];
    [mGLKView setNeedsDisplay];
}

- (void)updateCameraLayer
{
    mCameraLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
    mCameraLayer.frame = mCameraView.bounds;
    float x = mCameraView.frame.Origin.x;
    float y = mCameraView.frame.Origin.y;
    float w = mCameraView.frame.size.width;
    float h = mCameraView.frame.size.height;
    CATransform3D transform = CATransform3DIdentity;
    if (UIDeviceOrientationLandscapeLeft == [[UIDevice currentDevice] orientation]) {
        mCameraLayer.frame = CGRectMake(x, y, h, w);
        transform = CATransform3DTranslate(transform, (w - h) / 2, (h - w) / 2, 0);
        transform = CATransform3DRotate(transform, -M_PI/2, 0, 0, 1);
    } else if (UIDeviceOrientationLandscapeRight == [[UIDevice currentDevice] orientation]) {
        mCameraLayer.frame = CGRectMake(x, y, h, w);
        transform = CATransform3DTranslate(transform, (w - h) / 2, (h - w) / 2, 0);
        transform = CATransform3DRotate(transform, M_PI/2, 0, 0, 1);
    } else if (UIDeviceOrientationPortraitUpsideDown == [[UIDevice currentDevice] orientation]) {
        mCameraLayer.frame = mCameraView.bounds;
        transform = CATransform3DMakeRotation(M_PI, 0, 0, 1);
    } else {
        mCameraLayer.frame = mCameraView.bounds;
    }
    mCameraLayer.transform  = transform;
}

    enter code here
7
Lance Mao

上記のソリューションを使用して非推奨と変換の警告があり、iOS7ではvideoOrientationの設定が機能していないようでしたので、AVCaptureVideoPreviewLayerのゲッターに方向のチェックを入れます：

- (AVCaptureVideoPreviewLayer *) previewLayer
{
    if(!_previewLayer)
    {
        _previewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession: self.captureSession];

    [_previewLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill];

    _previewLayer.frame = self.view.bounds; // Assume you want the preview layer to fill the view.

    [_previewLayer setPosition:CGPointMake(0,0)];

    if (UIDeviceOrientationLandscapeLeft == [[UIDevice currentDevice] orientation]) {
        _previewLayer.transform = CATransform3DMakeRotation(-M_PI/2, 0, 0, 1);
    }
    else if (UIDeviceOrientationLandscapeRight == [[UIDevice currentDevice] orientation])
    {
        _previewLayer.transform = CATransform3DMakeRotation(M_PI/2, 0, 0, 1);
    }
}

return _previewLayer;
}
4
mrdavenz

Swift 4、Xcode 9：

  override func viewWillTransition(to size: CGSize,
                                   with coordinator: UIViewControllerTransitionCoordinator)
  {
    super.viewWillTransition(to: size, with: coordinator)
    guard
    let conn = self.previewLayer?.connection,
      conn.isVideoOrientationSupported
      else { return }
    let deviceOrientation = UIDevice.current.orientation
    switch deviceOrientation {
    case .portrait: conn.videoOrientation = .portrait
    case .landscapeRight: conn.videoOrientation = .landscapeLeft
    case .landscapeLeft: conn.videoOrientation = .landscapeRight
    case .portraitUpsideDown: conn.videoOrientation = .portraitUpsideDown
    default: conn.videoOrientation = .portrait
    }
  }

ここで注意すべき微妙な点は、UIDeviceOrientation.landscapeRight 仲良くやっていく AVCaptureVideoOrientation.landscapeLeft。

他のランドスケープのケースも同様に不一致です。これは意図的なものであり、UIKitとAVFoundation間の不幸な不一致に対応しています。名前を一致させて大文字と小文字を一致させた場合、機能せず、ビデオは横長の構成で上下逆になります。

3
algal

UIDeviceOrientationからAVCaptureVideoOrientationへの正しいマッピングが必要です。

アプリが_device rotation_をサポートする場合、_resizing preview.frame_も必要であり、このfuncはviewDidLayoutSubviews()およびviewWillTransition()から呼び出す必要があります。

_private func configureVideoOrientation() {
    if let preview = self.previewLayer,
        let connection = preview.connection {
        let orientation = UIDevice.current.orientation

        if connection.isVideoOrientationSupported {
            var videoOrientation: AVCaptureVideoOrientation
            switch orientation {
            case .portrait:
                videoOrientation = .portrait
            case .portraitUpsideDown:
                videoOrientation = .portraitUpsideDown
            case .landscapeLeft:
                videoOrientation = .landscapeRight
            case .landscapeRight:
                videoOrientation = .landscapeLeft
            default:
                videoOrientation = .portrait
            }
            preview.frame = self.view.bounds
            connection.videoOrientation = videoOrientation
        }
    }
}
_
3
water

Hey Guysは、これに関するすべての回答とフィードバックに感謝します。Swift=アプリ。

override func shouldAutorotate() -> Bool {
        if your cameraController.previewLayer.connection != nil {
            var currentDevice: UIDevice = UIDevice.currentDevice()
            var orientation: UIDeviceOrientation = currentDevice.orientation

            var previewLayerConnection : AVCaptureConnection = your cameraController.previewLayer.connection

            if (previewLayerConnection.supportsVideoOrientation)
            {
                switch (orientation)
                {
                case .Portrait:
                    previewLayerConnection.videoOrientation = AVCaptureVideoOrientation.Portrait
                    break
                case .LandscapeRight:
                    previewLayerConnection.videoOrientation = AVCaptureVideoOrientation.LandscapeLeft
                    break
                case .LandscapeLeft:
                    previewLayerConnection.videoOrientation = AVCaptureVideoOrientation.LandscapeRight
                    break
                default:
                    previewLayerConnection.videoOrientation = AVCaptureVideoOrientation.Portrait
                    break
                }
            }

        }
        return true
    }

お役に立てれば！

2
Pablo Segura

私も同じに直面していましたこれは私のカメラの向きを修正することでした

override func shouldAutorotate() -> Bool {
        return false
    }

override func preferredInterfaceOrientationForPresentation() -> UIInterfaceOrientation {
        return UIInterfaceOrientation.LandscapeLeft
    }

override func supportedInterfaceOrientations() -> UIInterfaceOrientationMask {
        return UIInterfaceOrientationMask.LandscapeLeft
    }

カメラを修正するには

let previewLayer: AVCaptureVideoPreviewLayer = AVCaptureVideoPreviewLayer(session: self.avCaptureSession)    
previewLayer.frame = self.view.layer.frame
previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
1
Cloy

Swift 4.2-Xcode 10.0-iOS 12.0：

var videoPreviewLayer: AVCaptureVideoPreviewLayer?

override func viewDidLayoutSubviews() {
  super.viewDidLayoutSubviews()
  if let previewLayerConnection =  self.videoPreviewLayer?.connection, previewLayerConnection.isVideoOrientationSupported {
    updatePreviewLayer(layer: previewLayerConnection, orientation: UIApplication.shared.statusBarOrientation.videoOrientation)
  }
}

private func updatePreviewLayer(layer: AVCaptureConnection, orientation: AVCaptureVideoOrientation) {
  layer.videoOrientation = orientation
  videoPreviewLayer?.frame = self.view.bounds
}

UIInterfaceOrientationからAVCaptureVideoOrientationへのマッピングを忘れないでください

extension UIInterfaceOrientation {

  public var videoOrientation: AVCaptureVideoOrientation {
    switch self {
    case .portrait:
      return AVCaptureVideoOrientation.portrait
    case .landscapeRight:
      return AVCaptureVideoOrientation.landscapeRight
    case .landscapeLeft:
      return AVCaptureVideoOrientation.landscapeLeft
    case .portraitUpsideDown:
      return AVCaptureVideoOrientation.portraitUpsideDown
    default:
      return AVCaptureVideoOrientation.portrait
    }
  }

}
1
juliancadi

Swift 5バージョン

  override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()
    updatePreview()
  }

  func updatePreview() {
    let orientation: AVCaptureVideoOrientation
    switch UIDevice.current.orientation {
      case .portrait:
        orientation = .portrait
      case .landscapeRight:
        orientation = .landscapeLeft
      case .landscapeLeft:
        orientation = .landscapeRight
      case .portraitUpsideDown:
        orientation = .portraitUpsideDown
      default:
        orientation = .portrait
    }
    if previewLayer?.connection?.isVideoOrientationSupported == true {
      previewLayer?.connection?.videoOrientation = orientation
    }
    previewLayer.frame = view.bounds
  }
1
Steven

まず、AVCaptureVideoPreviewLayerを作成する必要があります：

  1. そのvideoGravityを設定します（私の場合は、ビデオ出力を取得するために小さなビューを使用しています）。

  2. フレームを設定します。

    [_videoPreviewLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill];
[_videoPreviewLayer setFrame:_viewPreview.layer.bounds];

  3. 最初に方向を設定します

    if (_videoPreviewLayer.connection.supportsVideoOrientation) {
        _videoPreviewLayer.connection.videoOrientation = [self interfaceOrientationToVideoOrientation:[UIApplication sharedApplication].statusBarOrientation];
    }

  4. シンプルなスイッチケースを使用して、各ケースの向きを設定します

    -(AVCaptureVideoOrientation)interfaceOrientationToVideoOrientation:

    (UIInterfaceOrientation)orientation {

    switch (orientation) {
        case UIInterfaceOrientationPortrait:
            return AVCaptureVideoOrientationPortrait;
        case UIInterfaceOrientationPortraitUpsideDown:
            return AVCaptureVideoOrientationPortraitUpsideDown;
        case UIInterfaceOrientationLandscapeLeft:
            return AVCaptureVideoOrientationLandscapeLeft ;
        case UIInterfaceOrientationLandscapeRight:
            return AVCaptureVideoOrientationLandscapeRight;
        default:
            break;
    }
    NSLog(@"Warning - Didn't recognise interface orientation (%d)",orientation);
    return AVCaptureVideoOrientationPortrait;
</ code>

    }
  5. デバイスはlandscapeLeftとlandscapeRightの両方をサポートするため、回転時に呼び出されるデリゲートを使用します：
    - (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration{
if (_videoPreviewLayer.connection.supportsVideoOrientation) {
    _videoPreviewLayer.connection.videoOrientation = [self interfaceOrientationToVideoOrientation:toInterfaceOrientation];
 }
}
1
Maniac One

Maselko's answer ほぼ機能しましたが、ステータスバーの向きが反転するとカメラ出力が上下逆に表示される点が異なります。ステータスバーが反転したときにMaselkoのロジックを呼び出すことで、この問題に対処しました。

これは、変更されたMaselkoソリューションです（ios12/Swift4でテスト済み）：

override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()
    setCameraOrientation()
}

override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
    super.viewWillTransition(to: size, with: coordinator)
    setCameraOrientation()
}

@objc func setCameraOrientation() {
    if let connection =  self.previewLayer?.connection  {
        let currentDevice: UIDevice = UIDevice.current
        let orientation: UIDeviceOrientation = currentDevice.orientation
        let previewLayerConnection : AVCaptureConnection = connection
        if previewLayerConnection.isVideoOrientationSupported {
            let o: AVCaptureVideoOrientation
            switch (orientation) {
            case .portrait: o = .portrait
            case .landscapeRight: o = .landscapeLeft
            case .landscapeLeft: o = .landscapeRight
            case .portraitUpsideDown: o = .portraitUpsideDown
            default: o = .portrait
            }

            previewLayerConnection.videoOrientation = o
            previewLayer!.frame = self.view.bounds
        }
    }
}
1
sttawm

Maselkoの回答の改良版

うまくいきます！

override func viewDidLayoutSubviews() {
  super.viewDidLayoutSubviews()
  if let connection =  previewView.connection  {
    if connection.isVideoOrientationSupported {
      let videoOrientation = AVCaptureVideoOrientation.init(rawValue: UIApplication.shared.statusBarOrientation.rawValue)!
      connection.videoOrientation = videoOrientation
      previewView.frame = self.view.bounds
    }
  }
}
0
Kenan Karakecili

Swift 4。

それは短く、私のために美しく機能します。

open override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
    super.viewWillTransition(to: size, with: coordinator)

    let videoLayer = self.previewLayer
    coordinator.animate(alongsideTransition: { (context: UIViewControllerTransitionCoordinatorContext) in

        guard let connection = videoLayer?.connection, connection.isVideoOrientationSupported, let orientation = AVCaptureVideoOrientation(rawValue: UIApplication.shared.statusBarOrientation.rawValue) else {
            return
        }

        connection.videoOrientation = orientation
        videoLayer?.frame = self.view.bounds

    }) { (context: UIViewControllerTransitionCoordinatorContext) in
        // handle any completion logic here...
    }
}
0
digitalHound

@Maselkoの答えは正しいですが、一つの理由として、あなたはUIApplication.shared.statusBarOrientation の代わりに UIDevice.current.orientation。これは、デバイスの向きがデバイスの物理的な位置であるためです。デバイスが横向きのときは壊れますが、UIはその向きをサポートしません（横向き専用カメラアプリを作成して、デバイスが縦向きのときに表示を開始するときなど）。

private func updatePreviewLayer(layer: AVCaptureConnection, orientation: AVCaptureVideoOrientation) {

    layer.videoOrientation = orientation

    previewLayer.frame = self.view.bounds

}

override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()

    if let connection =  self.previewLayer?.connection  {

        let currentDevice: UIDevice = UIDevice.current

        let orientation = UIApplication.shared.statusBarOrientation

        let previewLayerConnection : AVCaptureConnection = connection

        if previewLayerConnection.isVideoOrientationSupported {

            switch (orientation) {
            case .portrait: updatePreviewLayer(layer: previewLayerConnection, orientation: .portrait)

                break

            case .landscapeRight: updatePreviewLayer(layer: previewLayerConnection, orientation: .landscapeLeft)

                break

            case .landscapeLeft: updatePreviewLayer(layer: previewLayerConnection, orientation: .landscapeRight)

                break

            case .portraitUpsideDown: updatePreviewLayer(layer: previewLayerConnection, orientation: .portraitUpsideDown)

                break

            default: updatePreviewLayer(layer: previewLayerConnection, orientation: .portrait)

                break
            }
        }
    }
}
0
Teng L

IOS 8から11.1で問題なく動作する唯一の方法はこれを行うことであり、私の場合、アプリケーションをランドスケープモードでのみロードしましたが、すべての方向で動作するはずです（ただし、 imageviewを介して手動でカメラまたはあなたがこの方法を非常に簡単に望むもの）

@interface ViewController (){
    AVCaptureVideoPreviewLayer * previewLayer;
    AVCaptureSession* session;
}
@property (weak, nonatomic) IBOutlet UIView *cameraPreviewView;


-(void)viewDidLoad{
    AVCaptureDeviceInput *captureInput = [AVCaptureDeviceInput deviceInputWithDevice:[AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo] error:nil];
    if (captureInput) {
        session = [[AVCaptureSession alloc] init];
        [session addInput:captureInput];
    }
    previewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:session];
    [previewLayer setBackgroundColor:[[UIColor blackColor] CGColor]];
    [previewLayer setVideoGravity:AVLayerVideoGravityResizeAspect];

    CALayer *rootLayer = [self.cameraPreviewView layer];
    [rootLayer setMasksToBounds:YES];
    [previewLayer setFrame:[self.view bounds]];
    [rootLayer addSublayer:previewLayer];
    [session startRunning];

    //Orientation Code is in viewDidLayoutSubviews method
}
-(void)viewDidLayoutSubviews {
    [super viewDidLayoutSubviews];

    UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
    switch (orientation) {
        case UIInterfaceOrientationPortrait:
            [previewLayer.connection setVideoOrientation:AVCaptureVideoOrientationPortrait];
            break;
        case UIInterfaceOrientationPortraitUpsideDown:
            [previewLayer.connection setVideoOrientation:AVCaptureVideoOrientationPortraitUpsideDown];
            break;
        case UIInterfaceOrientationLandscapeLeft:
            [previewLayer.connection setVideoOrientation:AVCaptureVideoOrientationLandscapeLeft];
            break;
        case UIInterfaceOrientationLandscapeRight:
            [previewLayer.connection setVideoOrientation:AVCaptureVideoOrientationLandscapeRight];
            break;
        default:break;
    }
}
0
Reza.Ab