AVCaptureVideoPreviewLayer ekranı doldurmuyor

Question

Bir iPhone'un tam ekranını dolduran VideoPreviewLayer'ın nasıl yapılacağı hakkında bir milyon iş parçacığı okuyorum ancak hiçbir şey işe yaramıyor ... belki de bana yardımcı olabilirsiniz çünkü gerçekten sıkışmış durumdayım.

Bu benim Önizleme katman init geçerli:

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]; 

benim setupAvCapture Yöntem var:

//-- 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]; 

Zaten AVCaptureSessionPresets ve ResizeFit seçenekleri farklı kullanmaya çalıştı. Ama her zaman şuna benzer:

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

Ya da bu kullandığım takdirde previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill; Katmanın boyutunu günlüğe kaydedersem, doğru tam ekran boyutu döndürülür.

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

Answer 1

deneyin:

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

Swift Güncelleme

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

Swift 4.0 Güncelleme

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