如何将多个UIImageViews合并成一个UIImage [英] How to merge multiple UIImageViews into one UIImage

问题描述

我有2个UIImageViews放在彼此的顶部（图片+重叠框架），我想把它们保存到相机胶卷作为1张图片。

I have 2 UIImageViews laying on top of each other ( picture + overlay frame ) and I want to save them to the camera roll as 1 picture.

我合并这2个UIImageViews，以便我可以调用UIImageWriteToSavedPhotosAlbum函数，使用'result'UIImage？

How should I combine those 2 UIImageViews so that I can call the UIImageWriteToSavedPhotosAlbum function, using a 'result' UIImage?

推荐答案

现在有我的Mac附近，但我已经这样做了。
该过程是将 UIImageView 转换为位图上下文，然后创建一个 CGImage 从该上下文，您可以使用创建一个新的 UIImage 从。
阅读 CGBitmapContext ，包括 CGBitmapContextCreateImage

I don't have my Mac nearby at the moment, but I have done this before. The process is that you'll render the UIImageViews into a bitmap context, then create a CGImage from that context that you can use to create a new UIImage from. Read up on CGBitmapContext, including CGBitmapContextCreateImage

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