UIColor 到十六进制(网页颜色) [英] UIColor to Hexadecimal (web color)

问题描述

是否有一种简单的方法可以将 UIColor 转换为十六进制值?
或者我们是否必须使用 CGColorGetComponents 获取 RGB 组件，然后从那里开始计算?

Is there an easy way to convert UIColor to a hexadecimal value ?
Or do we have to get the RGB components with CGColorGetComponents and then work it out from there?

例如 CGColorGetComponents(color.CGColor)[0] * 256 ?

推荐答案

我会考虑使用 Erica Sadun 的 UIColor 类别.它包括许多免费功能，包括十六进制表示.它非常易于使用，只需将其添加到您使用它的任何类头中，或者将其添加到预编译头中以获得最大的灵活性.如果您要添加到预编译标头，请执行类似于以下操作:

I would consider using Erica Sadun's UIColor category. It includes a lot of functionality for free, including hex representations. It's pretty easy to use, just add it to whatever class header you're using it in or, add it to the pre-compiled header for ultimate flexibility. If you're adding to the pre-compiled header, do so similar to something like this:

#ifdef __OBJC__
    #import <Foundation/Foundation.h>
    #import <UIKit/UIKit.h>
    #import "UIColor-Expanded.h"
#endif

然后你可以这样使用它NSLog(@"%@", [myColor hexStringFromColor]);

指向 UIColor 类别的 GitHub 链接:https://github.com/erica/uicolor-utilities

GitHub link to the UIColor category: https://github.com/erica/uicolor-utilities

ArsTechnica 关于它的文章:http:///arstechnica.com/apple/guides/2009/02/iphone-development-accessing-uicolor-components.ars

ArsTechnica article about it: http://arstechnica.com/apple/guides/2009/02/iphone-development-accessing-uicolor-components.ars

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