图像旋转后的CIFilter

Question

我正在对肖像图像应用CIFilter。出于某种原因，它顺时针旋转了90度。我该如何解决这个问题?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

我猜问题出在这一行:

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

那不是你如何渲染过滤器到一个UIImage。你想要做的是调用CIContext(options: nil)去获取一个CIContext，然后发送那个CIContext消息createCGImage:fromRect:去获取一个CGImage。现在把CGImage变成一个UIImage，当你这样做的时候，你可以应用你的朝向。

Answer 2

你可以试试:

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)