Swift NSImage到CGImage

本文介绍了Swift NSImage到CGImage的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

如何在Swift中将NSImage转换为CGImage？在Objective-C我做了这样：

How can I convert a NSImage to CGImage in Swift? In Objective-C I did it like this:

- (CGImageRef)CGImage { NSData *imageData = self.TIFFRepresentation; CGImageSourceRef source = CGImageSourceCreateWithData((__bridge CFDataRef)imageData, NULL); CGImageRef maskRef = CGImageSourceCreateImageAtIndex(source, 0, NULL); return maskRef; }

现在我试过：

extension NSImage { var CGImage: CGImageRef { get { let imageData = self.TIFFRepresentation let source = CGImageSourceCreateWithData(imageData as CFDataRef, nil) let maskRef = CGImageSourceCreateImageAtIndex(source, UInt(0), nil) return maskRef; } } }

我收到错误：无法找到一个重载的'init'接受提供的参数'在行 let maskRef ...

推荐答案

这里是我用来将NSImage转换为CGImage：

Here's what I'm using to convert NSImage to CGImage:

let image = NSImage(named:"image") if let image = image { var imageRect:CGRect = CGRectMake(0, 0, image.size.width, image.size.height) var imageRef = image.CGImageForProposedRect(&imageRect, context: nil, hints: nil) }