Xcode 8 / Swift 3 - 类型“CGColorRenderingIntent”没有成员“RenderingIntentDefault”

Question

除了最后一行之外，我已经成功地将许多错误转换为 Swift 3。它适用于 Xcode 7，但不适用于 Xcode 8。

还值得注意的是，Xcode 7 有关于 CGColorRenderingIntent 的文档，但 Xcode 8 没有。

类型“CGColorRenderingIntent”没有成员“RenderingIntentDefault”

我正在使用的代码：

import CoreImage

// omitted code

public func imageFromPixels(pixels: ([Pixel], width: Int, height: Int)) -> CIImage {
let bitsPerComponent = 8
let bitsPerPixel = 32
let rgbColorSpace = CGColorSpaceCreateDeviceRGB()
let bitmapInfo = CGBitmapInfo(rawValue: CGImageAlphaInfo.premultipliedLast.rawValue) // alpha is last
let providerRef = CGDataProvider(data: NSData(bytes: pixels.0, length: pixels.0.count * sizeof(Pixel)))
let image = CGImageCreate(pixels.1, pixels.2, bitsPerComponent, bitsPerPixel, pixels.1 * sizeof(Pixel), rgbColorSpace, bitmapInfo, providerRef!, nil, true, CGColorRenderingIntent.RenderingIntentDefault)
return CIImage(CGImage: image!)
}

苹果文档：

enum CGColorRenderingIntent : Int32 {
case RenderingIntentDefault
case RenderingIntentAbsoluteColorimetric
case RenderingIntentRelativeColorimetric
case RenderingIntentPerceptual
case RenderingIntentSaturation
}

更新代码：

let image = CGImage(width: pixels.1,
                    height: pixels.2,
                    bitsPerComponent: bitsPerComponent,
                    bitsPerPixel: bitsPerPixel,
                    bytesPerRow: pixels.1 * sizeof(Pixel),
                    space: rgbColorSpace,
                    bitmapInfo: bitmapInfo,
                    provider: providerRef!,
                    decode: nil,
                    shouldInterpolate: true,
                    intent: .defaultIntent)

return CGImage(CGImage: image!) //  Incorrect argument label in call (have 'CGImage:', expected 'copy:')

Answer 1

⌘-单击符号CGColorRenderingIntent，你会看到

public enum CGColorRenderingIntent : Int32 {

  case defaultIntent
  case absoluteColorimetric
  case relativeColorimetric
  case perceptual
  case saturation 
}

原来如此

let image = CGImage(width: pixels.1, 
                   height: pixels.2, 
         bitsPerComponent: bitsPerComponent, 
             bitsPerPixel: bitsPerPixel, 
              bytesPerRow: pixels.1 * sizeof(Pixel), 
                    space: rgbColorSpace, 
               bitmapInfo: bitmapInfo, 
                 provider: providerRef!, 
                   decode: nil, 
        shouldInterpolate: true, 
                   intent: .defaultIntent)

return CIImage(cgImage: image!)

甚至CGImage 和CIImage 的初始值设定项都已更改。