iPhone 目标 C:如何获取 UIImageView 上触摸点的像素颜色? [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:如何获取 UIImageView 上触摸点的像素颜色，即使父 UIView 或其自身正在被 旋转CGAffineTransformMakeRotation函数?

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?

即使 UIView/UIImageView 正在缩放和旋转，UITouch 的视图属性是否仍能正确返回触摸点的正确像素?

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?

非常感谢阅读

已感谢您的回答&评论，但抱歉，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.有人愿意帮忙吗?

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

快速谷歌搜索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?

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