문제 AVCaptureSession 모 iPad

Question

었을 캡처하려고 프레임에서 전면 카메라를 제시됩니다.여기에 내 코드

_session = [[AVCaptureSession alloc] init];
_session.sessionPreset = AVCaptureSessionPreset640x480;

AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
NSError *error = nil;
AVCaptureDeviceInput *deviceInput = [[AVCaptureDeviceInput alloc] initWithDevice:device error:&error];

if (deviceInput) {
    [_session addInput:deviceInput];
}
else {
    DDLogInfo(@"Some wierd shit happened");
    return;
}

// Session output
/*
AVCaptureMetadataOutput *output = [[AVCaptureMetadataOutput alloc] init];
[output setMetadataObjectsDelegate:self queue:dispatch_get_main_queue()];
[_session addOutput:output];
output.metadataObjectTypes = @[AVMetadataObjectTypeFace];
AVCaptureConnection *connection = [output connectionWithMediaType:AVMediaTypeMetadata];
connection.videoOrientation = AVCaptureVideoOrientationLandscapeLeft;
*/

// Session output
AVCaptureMovieFileOutput *videoOutput = [[AVCaptureMovieFileOutput alloc] init];
[_session addOutput:videoOutput];
AVCaptureConnection *connection = [videoOutput connectionWithMediaType:AVMediaTypeVideo];
connection.videoOrientation = AVCaptureVideoOrientationPortrait;

// Preview layer
_previewLayer = [AVCaptureVideoPreviewLayer layerWithSession:_session];
_previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
_previewLayer.frame = CGRectMake(0, 0, self.middleView.frame.size.width, self.middleView.frame.size.height);
[self.middleView.layer addSublayer:_previewLayer];

[_session startRunning];

문제와 함께 이것은,내 iPad 은 풍경의 이미지 프레젠테이션 층에는 90 도 회전합니다.이 문제를 어떻게 해결해야 하나요?검색되었습니다 stack overflow 작업을 수행하기 위해 노력하고,무언가를 가진 AVCaptureConnection, 하지만,슬프게도 아무 소용이 없습니다.

Answer 1

이제는 모든 방향에서 일하고 있습니다.우리는이를 설정해야합니다

를 설정해야합니다

_previewLayer.connection.videoOrientation = [self videoOrientationFromCurrentDeviceOrientation];

.

방법은 다음과 같습니다.

 - (AVCaptureVideoOrientation) videoOrientationFromCurrentDeviceOrientation {
switch (self.interfaceOrientation) {
    case UIInterfaceOrientationPortrait: {
        return AVCaptureVideoOrientationPortrait;
    }
    case UIInterfaceOrientationLandscapeLeft: {
        return AVCaptureVideoOrientationLandscapeLeft;
    }
    case UIInterfaceOrientationLandscapeRight: {
        return AVCaptureVideoOrientationLandscapeRight;
    }
    case UIInterfaceOrientationPortraitUpsideDown: {
        return AVCaptureVideoOrientationPortraitUpsideDown;
    }
}
}

.

또한 캡처 출력에서 우리가 설정해야합니다 :

AVCaptureConnection *output2VideoConnection = [videoOutput connectionWithMediaType:AVMediaTypeVideo];
output2VideoConnection.videoOrientation = [self videoOrientationFromCurrentDeviceOrientation];

.

Answer 2

에 Swift3:

우리는 먼저 설정해야 previewLayer.connection.videoOrientation 다음과 같 MegaManX do

previewLayer.connection.videoOrientation = self.videoOrientationFromCurrentDeviceOrientation()

는 메소드는 다음과 같습니다.

func videoOrientationFromCurrentDeviceOrientation() -> AVCaptureVideoOrientation {
    switch UIApplication.shared.statusBarOrientation {
    case .portrait:
        return AVCaptureVideoOrientation.portrait
    case .landscapeLeft:
        return AVCaptureVideoOrientation.landscapeLeft
    case .landscapeRight:
        return AVCaptureVideoOrientation.landscapeRight
    case .portraitUpsideDown:
        return AVCaptureVideoOrientation.portraitUpsideDown
    default:
        // Can this happen?
        return AVCaptureVideoOrientation.portrait
    }
}

그런 다음 우리는 또한 처리 videoOrientation 사용자는 회전 장치(method 에서 올 기)

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

    coordinator.animate(alongsideTransition: { (UIViewControllerTransitionCoordinatorContext) -> Void in
        self.previewLayer.connection.videoOrientation = self.videoOrientationFromCurrentDeviceOrientation()

        }, completion: { (UIViewControllerTransitionCoordinatorContext) -> Void in
            // Finish Rotation
    })

    super.viewWillTransition(to: size, with: coordinator)
}