AVCaptureVideoPreviewLayer가 화면을 채우지 못함

Question

VideoPreviewLayer를 iPhone의 전체 화면을 채우는 방법에 대해 약 백만 개의 스레드를 읽었지만 아무 것도 작동하지 않습니다 ... 어쩌면 당신이 정말로 붙어서 나를 도울 수 있습니다.

이 내 미리 층 초기화입니다 :

if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) 
{ 
    // Choosing bigger preset for bigger screen. 
    _sessionPreset = AVCaptureSessionPreset1280x720; 
} 
else 
{ 
    _sessionPreset = AVCaptureSessionPresetHigh; 
} 

[self setupAVCapture]; 

AVCaptureSession *captureSession = _session; 
AVCaptureVideoPreviewLayer *previewLayer = [AVCaptureVideoPreviewLayer layerWithSession:captureSession]; 
UIView *aView = self.view; 
previewLayer.frame = aView.bounds; 
previewLayer.connection.videoOrientation = AVCaptureVideoOrientationLandscapeRight; 
[aView.layer addSublayer:previewLayer]; 

내 setupAvCapture 방법입니다 :

//-- Setup Capture Session. 
_session = [[AVCaptureSession alloc] init]; 
[_session beginConfiguration]; 

//-- Set preset session size. 
[_session setSessionPreset:_sessionPreset]; 

//-- Creata a video device and input from that Device. Add the input to the capture session. 
AVCaptureDevice * videoDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; 
if(videoDevice == nil) 
    assert(0); 

//-- Add the device to the session. 
NSError *error; 
AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:videoDevice error:&error]; 
if(error) 
    assert(0); 

[_session addInput:input]; 

//-- Create the output for the capture session. 
AVCaptureVideoDataOutput * dataOutput = [[AVCaptureVideoDataOutput alloc] init]; 
[dataOutput setAlwaysDiscardsLateVideoFrames:YES]; // Probably want to set this to NO when recording 

//-- Set to YUV420. 
[dataOutput setVideoSettings:[NSDictionary dictionaryWithObject:[NSNumber numberWithInt:kCVPixelFormatType_420YpCbCr8BiPlanarFullRange] 
                 forKey:(id)kCVPixelBufferPixelFormatTypeKey]]; // Necessary for manual preview 

// Set dispatch to be on the main thread so OpenGL can do things with the data 
[dataOutput setSampleBufferDelegate:self queue:dispatch_get_main_queue()]; 

[_session addOutput:dataOutput]; 
[_session commitConfiguration]; 

[_session startRunning]; 

가 이미 AVCaptureSessionPresets 및 ResizeFit 옵션 다른를 사용했습니다. 그러나 항상 다음과 같습니다

http://imageshack.us/photo/my-images/707/img0013g.png/

또는를이 내가 사용하는 경우 previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill; 레이어의 크기를 기록하면 올바른 전체 화면 크기가 반환됩니다.

http://imageshack.us/photo/my-images/194/img0014k.png/

Answer 1

시도 :

AVCaptureVideoPreviewLayer *captureVideoPreviewLayer = [AVCaptureVideoPreviewLayer layerWithSession: self.session]; 
[captureVideoPreviewLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill]; 

신속한 업데이트

let previewLayer = AVCaptureVideoPreviewLayer(session: session) 
previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill 

스위프트 4.0 업데이트

let previewLayer = AVCaptureVideoPreviewLayer(session: session) 
previewLayer.videoGravity = AVLayerVideoGravity.resizeAspectFill