UIColor colorWithRed：green：blue：总是产生黑色 [英] UIColor colorWithRed:green:blue: always produces black

问题描述

我遇到过很多情况下，当我试图通过代码自定义颜色，结果是非常不同的Photoshop，例如

I have come across many instances when I try to make custom color through code and the result is quite different from Photoshop, e.g

[UIColor colorWithRed:(160/255) green:(97/255) blue:(5/255) alpha:1];

所得的颜色是黑色的，而我应该是黄色的。

the resultant color is blackish, whereas it should me something like yellow. When working using sliders, the result is as expected.

我的Xcode有问题，还是一个常见问题？

Is there a problem with my Xcode or it is a general issue?

推荐答案

除法整数导致整数除法，实质上意味着截断结果的小数部分。使用

Dividing integers results in integer division that essentially means truncating the fractional part of the result. Use

[UIColor colorWithRed:(160/255.0) green:(97/255.0) blue:(5/255.0) alpha:1.0]

。

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