CIFilter已更改UIImage Aspect Ratio - SWIFT [英] CIFilter has changed UIImage Aspect Ratio - SWIFT

问题描述

我已经实现了一个CIFilter到我的iOS应用程序profileImages。我添加了方向以防止像素化，但我受困于宽高比ScaleAspectFill不适用于图像。相同的彩色图像具有完美的纵横比...当我只有：

I have implemented a CIFilter to profileImages in my iOS app. I have added orientation to prevent pixelation but I am suffering from the aspect ratio "ScaleAspectFill" not being applied to the images. The same images in colour have the perfect aspect ratio...i.e. when I just have:

self.p1ProfilePic.image = p1Img

1. 我已为故事板中的个人资料图片指定了确切的高度和宽度。


2. 以编程方式添加.contentMode作为.ScaleAspectFill，但没有任何效果。



3. 我在这里缺少什么？ CIGhototer（name：CIPhotoEffectTonal）; CGRect？

1. I have specified exact height and widths for the profile images in Storyboard.
2. I have tried adding programmatically the .contentMode as .ScaleAspectFill but with no effect whatsoever.

3. What am I missing here? CGRect?

        let originalImageP1 = CIImage(image: p1Img!)
        let filter = CIFilter(name: "CIPhotoEffectTonal")
        filter!.setDefaults()
        filter!.setValue(originalImageP1, forKey: kCIInputImageKey)
        let outputImage = filter!.outputImage
        self.p1ProfilePic.image = UIImage(CIImage: outputImage!, scale: UIScreen.mainScreen().scale, orientation: .Up)

推荐答案

从 CIImage UIImage c>使用您的技术创建不尊重 contentMode 的图像。尝试这样：

Creating a UIImage from a CIImage with your technique creates images that don't respect contentMode. Try this instead:

let ciContext = CIContext()
let cgImage = ciContext.createCGImage(filter.outputImage!,
    fromRect: filter.outputImage!.extent)

self.p1ProfilePic.image = UIImage(CGImage: cgImage)

干杯！

Simon

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