iPhone目标C：如何在UIImageView上获取触摸点的像素颜色？ [英] iPhone Objective C: How to get a pixel's color of the touched point on an UIImageView?

问题描述

iPhone目标C：如何在 UIImageView 上获取触摸点的像素颜色，即使父 UIView 或者本身是通过 CGAffineTransformMakeRotation 函数旋转的？

iPhone Objective C: How to get a pixel's color of the touched point on an UIImageView, even if the parent UIView or itself is being rotated by the CGAffineTransformMakeRotation function?

UITouch的view属性是否仍会正确返回即使 UIView / UIImageView 正在缩放和旋转，触摸点的正确像素是什么？

Will the view property of the UITouch still correctly return the correct pixel of the touched point even if the UIView/UIImageView is being scaled and rotated?

非常感谢您的阅读

编辑：感谢您的回答&评论，但很遗憾我仍然不知道如何从触摸事件中获取缩放/旋转图像的X，Y点，然后从中提取颜色。有人会介意帮忙吗？

edited: Thanks for the answer & comments, but sorry I still don't know how to get the X,Y point of the scaled/rotated image from the touch event, and then extract the color from it. Would anyone mind to help?

推荐答案

A 快速谷歌搜索已经揭示了一些有希望的潜在客户：

A quick google search has revealed some promising leads:

• 从CGImage对象获取像素数据


• 另一个StackOverflow问题


• 我的像素是什么颜色的？

• Getting Pixel data from a CGImage object
• Another StackOverflow question
• What color is my pixel?

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