CIFilter后图像旋转

Question

我在把CIFilter应用到肖像图像上。由于某种原因，它顺时针旋转90。我怎么才能解决这个问题？我的代码在下面

var imgOrientation = oImage.imageOrientation
var imgScale = oImage.scale


let originalImage = CIImage(image: oImage)

var filter = CIFilter(name: "CIPhotoEffect"+arr[sender.tag-1000])
filter.setDefaults()
filter.setValue(originalImage, forKey: kCIInputImageKey)

var outputImage = filter.outputImage
var newImage = UIImage(CIImage:outputImage, scale:imgScale, orientation:imgOrientation)


cameraStill.image = newImage

Answer 1

我猜问题是这句话：

var newImage = UIImage(CIImage:outputImage, scale:imgScale, orientation:imgOrientation)

这不是将过滤器呈现到UIImage中的方式。您想要做的是调用CIContext(options: nil)获得一个CIContext，然后向CIContext发送消息createCGImage:fromRect:以获得CGImage。现在，将该CGImage转换为一个UIImage，在此过程中，您可以应用您的方向。

Answer 2

你可以试试这个：

let cgImage = self.context.createCGImage(filterOutputImage,
                                         from: cameraImage.extent)!

let orientation: UIImage.Orientation =
      currentCameraType == AVCaptureDevice.Position.front ?
           UIImage.Orientation.leftMirrored:
           UIImage.Orientation.right

let image = UIImage(cgImage: cgImage,
                    scale: 1.0,
                    orientation: orientation)