Swift 3和CGContextDrawImage [英] Swift 3 and CGContextDrawImage
本文介绍了Swift 3和CGContextDrawImage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
我想将此行转换为Swift 3当前语法代码,但似乎存在一些问题:
I want to translate this line to the Swift 3 current syntax code but seems there are some problems:
CGContextDrawImage(context, CGRect(x:0.0,y: 0.0,width: image!.size.width,height: image!.size.height), image!.cgImage)
根据 CoreGraphics.apinotes CGContextDrawImage
原为转换为CGContext.draw
:
Name: CGContextDrawImage
# replaced by draw(_ image: CGImage, in rect: CGRect, byTiling: Bool = false)
SwiftName: CGContext.__draw(self:in:image:)
SwiftPrivate: true
当我尝试做时:
CGContext.draw(context as! CGImage, in: CGRect(x:0.0, y:0.0, width: image!.size.width, height: image!.size.height), byTiling: false)
似乎有一些简单的语法会干扰编译器,但我看不到(实际上我收到了一个典型的模棱两可的错误):
Seems there is some simple syntax that disturb the compiler but I cannot see (in fact I receive a typical ambiguous error):
有人可以用这个新的swift 3语法代码帮助我吗?
Can anyone help me with this new swift 3 syntax code?
推荐答案
您需要调用它,就像它是CGContext
的实例方法一样:
You need to call it as if it's an instance method of CGContext
:
context.draw(image!.cgImage!, in: CGRect(x: 0.0,y: 0.0,width: image!.size.width,height: image!.size.height))
检查 CGContext
的最新参考.
Check the latest reference of CGContext
.
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