CIFilter后旋转的图像

Question

我正在将CIFilter应用于肖像图像.由于某种原因,它顺时针旋转90度.我怎样才能解决这个问题？我的代码如下

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

我猜这个问题就是这一行:

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

这不是你如何将过滤器渲染为UIImage.您要做的是调用CIContext(options: nil)获取CIContext,然后将该消息发送给CIContext createCGImage:fromRect:以获取CGImage.现在将CGImage转换为UIImage,并且在执行此操作时,您可以应用您的方向.