快速拍摄使用相机拍摄的图像

Question

我有一个用户可以拍照的应用程序，但我只需要保存我用作面具的UIView区域（背景清晰），当我尝试进行裁剪时这样做错了，我怀疑图像大于屏幕和裁剪区域它的工作正常，但参考图像而不是屏幕区域。

这是我的代码：（cameraFrame是掩码视图）

if let videoConnection = output.connectionWithMediaType(AVMediaTypeVideo) {
            output.captureStillImageAsynchronouslyFromConnection(videoConnection, completionHandler: {(sampleBuffer, error) in
                var imageData = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(sampleBuffer)
                var dataProvider = CGDataProviderCreateWithCFData(imageData)
                var cgImageRef = CGImageCreateWithJPEGDataProvider(dataProvider, nil, true, kCGRenderingIntentDefault)

                var cropped = CGImageCreateWithImageInRect(cgImageRef, self.cameraFrame.frame)
                self.imagen = UIImage(CGImage: cropped, scale: 1.0, orientation: UIImageOrientation.Right)
                self.performSegueWithIdentifier("aImagen", sender: self)
            })
        }

这是运行的应用：

Answer 1

我正在使用以下pod

https://github.com/AlexLittlejohn/ALCameraViewController

使用

let croppingEnabled = true
let cameraViewController = ALCameraViewController(croppingEnabled: croppingEnabled) { image in
    // Do something with your image here. 
    // If cropping is enabled this image will be the cropped version
}

presentViewController(cameraViewController, animated: true, completion: nil)