將濾鏡應用於UIImage時，結果顛倒了

Question

這真讓我討厭。 當我將UIImage轉換為CIImage時，應用濾鏡，然后將圖像上下顛倒地轉換（對於橫向）或逆時針旋轉90度（對於縱向）。

var image:UIImage?
var index:Int?

@IBOutlet weak var photo: UIImageView!

@IBAction func editImage(sender: UIBarButtonItem) {
    println("editImage")
    let beginImage = CIImage(image: self.image)
    let filter = CIFilter(name: "CISepiaTone")
    filter.setValue(beginImage, forKey: kCIInputImageKey)
    filter.setValue(0.8, forKey: kCIInputIntensityKey)
    let newImage = UIImage(CIImage: filter.outputImage)
    self.photo.image = newImage
}

Answer 1

將圖像方向和已過濾圖像的比例設置回原始值：

let newImage = UIImage(CIImage:filter.outputImage, scale:self.image.scale, orientation:self.image.imageOrientation)