在CGMutablePath中绘制UIImage [英] drawing UIImage inside a CGMutablePath

问题描述

鉴于CGMutablePathRef如何在其中绘制UIImage？我知道您可以像下面那样绘制它：

Given a CGMutablePathRef how do I draw a UIImage in it? I know that you can draw it like the following:

 UIImage* scaledImage = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();
        [scaledImage drawAtPoint:CGPointMake(0, 0)];
        CGContextRestoreGState(context);

但我不确定我是否有路径（这是一个带圆角的矩形）怎么做我在其中添加了一个图像？

but I am not sure if I have a path (which is a rectangle with rounded corner) how do I add an image in it?

推荐答案

当你说在CGMutablePath中绘制时，我必须假设你的意思是剪辑 CGMutablePath。在这种情况下，您只需要添加当前上下文的路径（ CGContextAddPath（）或任何路径构建函数，如 CGContextAddLineToPoint（） ）然后调用 CGContextClip（）。然后，您可以在上下文中使用类似 drawAtPoint：或 CGContextDrawImage（）的方式绘制图像。

When you say "draw within a CGMutablePath" I have to assume you mean "clip to a CGMutablePath." In that case, you just need to add the path to the current context (CGContextAddPath() or any of the path-building functions like CGContextAddLineToPoint()) and then call CGContextClip(). You can then draw your image in the context with something like drawAtPoint: or CGContextDrawImage().

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