AVCam 미리보기 이미지 미리보기

Question

iOS 카메라를 처음 사용했습니다. 사진 (스틸 이미지) 만 찍을 수있는 간단한 앱을 만들려고합니다.

https://developer.apple.com/library/ios/samplecode/AVCam/Introduction/Intro.html#//apple_ref/doc/uid/DTS40010112-Intro-DontLinkElementID_2 

내가 그림에서와 같이, 사용자 정의 사진 크기를 만들려면 : 나는 WWDC에서 코드를 사용하고
여기에 이미지 설명

를 입력하지만 결과는 다음과 같습니다 enter image description here

어떻게 정사각형 크기로 고정시킬 수 있습니까?

고마워요!

편집 : 결과 그림을 첨부하고 있습니다. enter image description here 어떻게 해결할 수 있습니까?

Edite 2 :

CMPCameraViewController :

- (void)viewDidLoad 
{ 
[super viewDidLoad]; 

// Disable UI. The UI is enabled if and only if the session starts running. 
self.stillButton.enabled = NO; 

// Create the AVCaptureSession. 
self.session = [[AVCaptureSession alloc] init]; 

// Setup the preview view. 
self.previewView.session = self.session; 

// Communicate with the session and other session objects on this queue. 
self.sessionQueue = dispatch_queue_create("session queue", DISPATCH_QUEUE_SERIAL); 

self.setupResult = AVCamSetupResultSuccess; 


// Setup the capture session. 
// In general it is not safe to mutate an AVCaptureSession or any of its inputs, outputs, or connections from multiple threads at the same time. 
// Why not do all of this on the main queue? 
// Because -[AVCaptureSession startRunning] is a blocking call which can take a long time. We dispatch session setup to the sessionQueue 
// so that the main queue isn't blocked, which keeps the UI responsive. 
dispatch_async(self.sessionQueue, ^{ 
    if (self.setupResult != AVCamSetupResultSuccess) { 
     return; 
    } 

    self.backgroundRecordingID = UIBackgroundTaskInvalid; 
    NSError *error = nil; 

    AVCaptureDevice *videoDevice = [CMPCameraViewController deviceWithMediaType:AVMediaTypeVideo preferringPosition:AVCaptureDevicePositionBack]; 
    AVCaptureDeviceInput *videoDeviceInput = [AVCaptureDeviceInput deviceInputWithDevice:videoDevice error:&error]; 

    if (! videoDeviceInput) { 
     NSLog(@"Could not create video device input: %@", error); 
    } 

    [self.session beginConfiguration]; 

    if ([self.session canAddInput:videoDeviceInput]) { 
     [self.session addInput:videoDeviceInput]; 
     self.videoDeviceInput = videoDeviceInput; 

     dispatch_async(dispatch_get_main_queue(), ^{ 
      // Why are we dispatching this to the main queue? 
      // Because AVCaptureVideoPreviewLayer is the backing layer for AAPLPreviewView and UIView 
      // can only be manipulated on the main thread. 
      // Note: As an exception to the above rule, it is not necessary to serialize video orientation changes 
      // on the AVCaptureVideoPreviewLayer’s connection with other session manipulation. 

      // Use the status bar orientation as the initial video orientation. Subsequent orientation changes are handled by 
      // -[viewWillTransitionToSize:withTransitionCoordinator:]. 
      UIInterfaceOrientation statusBarOrientation = [UIApplication sharedApplication].statusBarOrientation; 
      AVCaptureVideoOrientation initialVideoOrientation = AVCaptureVideoOrientationPortrait; 
      if (statusBarOrientation != UIInterfaceOrientationUnknown) { 
       initialVideoOrientation = (AVCaptureVideoOrientation)statusBarOrientation; 
      } 

      AVCaptureVideoPreviewLayer *previewLayer = (AVCaptureVideoPreviewLayer *)self.previewView.layer; 
      previewLayer.connection.videoOrientation = initialVideoOrientation; 
      previewLayer.bounds = _previewView.frame; 
      //previewLayer.connection.videoOrientation = UIInterfaceOrientationLandscapeLeft; 
     }); 
    } 
    else { 
     NSLog(@"Could not add video device input to the session"); 
     self.setupResult = AVCamSetupResultSessionConfigurationFailed; 
    } 

    AVCaptureDevice *audioDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeAudio]; 
    AVCaptureDeviceInput *audioDeviceInput = [AVCaptureDeviceInput deviceInputWithDevice:audioDevice error:&error]; 

    if (! audioDeviceInput) { 
     NSLog(@"Could not create audio device input: %@", error); 
    } 

    if ([self.session canAddInput:audioDeviceInput]) { 
     [self.session addInput:audioDeviceInput]; 
    } 
    else { 
     NSLog(@"Could not add audio device input to the session"); 
    } 

    AVCaptureMovieFileOutput *movieFileOutput = [[AVCaptureMovieFileOutput alloc] init]; 
    if ([self.session canAddOutput:movieFileOutput]) { 
     [self.session addOutput:movieFileOutput]; 
     AVCaptureConnection *connection = [movieFileOutput connectionWithMediaType:AVMediaTypeVideo]; 
     if (connection.isVideoStabilizationSupported) { 
      connection.preferredVideoStabilizationMode = AVCaptureVideoStabilizationModeAuto; 
     } 
     self.movieFileOutput = movieFileOutput; 
    } 
    else { 
     NSLog(@"Could not add movie file output to the session"); 
     self.setupResult = AVCamSetupResultSessionConfigurationFailed; 
    } 

    AVCaptureStillImageOutput *stillImageOutput = [[AVCaptureStillImageOutput alloc] init]; 
    if ([self.session canAddOutput:stillImageOutput]) { 
     stillImageOutput.outputSettings = @{AVVideoCodecKey : AVVideoCodecJPEG}; 
     [self.session addOutput:stillImageOutput]; 
     self.stillImageOutput = stillImageOutput; 
    } 
    else { 
     NSLog(@"Could not add still image output to the session"); 
     self.setupResult = AVCamSetupResultSessionConfigurationFailed; 
    } 

    [self.session commitConfiguration]; 
});  
} 

CMPPreviewView :

+ (Class)layerClass 
    { 
    return [AVCaptureVideoPreviewLayer class]; 
    } 

- (AVCaptureSession *)session 
{ 
AVCaptureVideoPreviewLayer *previewLayer = (AVCaptureVideoPreviewLayer *)self.layer; 
return previewLayer.session; 
} 

- (void)setSession:(AVCaptureSession *)session 
{ 
AVCaptureVideoPreviewLayer *previewLayer = (AVCaptureVideoPreviewLayer *)self.layer; 
previewLayer.session = session; 
((AVPlayerLayer *)[self layer]).videoGravity = AVLayerVideoGravityResize; 
    } 

Answer 1

애플의 AVCam 코드는 사진 개발에 들어가기위한 좋은 출발점입니다.

비디오 미리보기 레이어의 크기를 변경하려고합니다. 이는 videoGravity 설정을 변경하여 수행됩니다. 여기에 측면 채우기 유형 볼 수있는 예입니다 :

[Swift 3] 

previewView.videoPreviewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill 

를 이제 다음 AVLayerVideoGravityResize를 사용 계층 경계를 정의하는 데 필요한 사각형에 작성의 상황에.

참고 : 참고 : 캡처 한 사진의 크기에는 영향을주지 않습니다. 단순히 비디오 미리보기 레이어의 크기를 수정합니다. 이것은 중요한 차이입니다. 캡처 한 사진의 크기를 변경하려면 자르기 작업을 수행해야합니다 (다양한 방법으로 상당히 쉽게 수행 할 수 있음). 그러나 이는 의도하지 않은 것처럼 보입니다.

행운을 빈다.

편집 : 자, 캡처 된 UIImage를 자르려는 것 같습니다.

[Swift 3] 
// I'm going to assume you've done something like this to store the captured data to a UIImage object 
//If not, I would do so 
let myImage = UIImage(data: capturedImageData)! 

// using core graphics (the cg in cgImage) you can perform all kinds of image manipulations--crop, rotation, mirror, etc. 
// here's crop to a rectangle--fill in with your desired values 
let myRect = CGRect(x: ..., y: ..., width: ..., height: ...) 
myImage = myImage.cgImage?.cropping(to: myRect) 

이 질문에 대한 답변입니다.