iOS中的UIColor可以使用16进制来选取颜色.
预先定义如下:
<code class="hljs cs has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;"><span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">#<span class="hljs-keyword" style="box-sizing: border-box;">define</span> UIColorFromHex(s) </span>
[UIColor colorWithRed:(((s & <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0xFF0000</span>) >> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">16</span>))/<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">255.0</span>
green:(((s & <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0xFF00</span>) >> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">8</span>))/<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">255.0</span>
blue:((s & <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0xFF</span>))/<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">255.0</span> alpha:<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">1.0</span>]</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li></ul><code cl
