如何将多个 UIImageView 合并为一个 UIImage [英] How to merge multiple UIImageViews into one UIImage

问题描述

我有 2 个 UIImageViews 彼此叠放(图片 + 覆盖框)，我想将它们作为 1 张图片保存到相机胶卷中.

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.

我应该如何组合这 2 个 UIImageView，以便我可以使用结果"UIImage 调用 UIImageWriteToSavedPhotosAlbum 函数?

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

推荐答案

我现在附近没有我的 Mac，但我以前做过.该过程是您将 UIImageView 渲染到位图上下文中，然后从该上下文创建一个 CGImage，您可以使用它来创建一个新的 UIImage来自.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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