本文共 1072 字，大约阅读时间需要 3 分钟。

创建UIColor的分类

//  UIColor+Addition.h#import 
   
    @interface UIColor (Addition)/// 使用 16 进制数字创建颜色，例如 0xFF0000 创建红色////// @param hex 16 进制无符号32位整数////// @return 颜色+ (instancetype)colorWithHex:(uint32_t)hex;/// 生成随机颜色////// @return 随机颜色+ (instancetype)randomColor;/// 使用 R / G / B 数值创建颜色////// @param red   red/// @param green green/// @param blue  blue////// @return 颜色+ (instancetype)colorWithRed:(uint8_t)red green:(uint8_t)green blue:(uint8_t)blue;@end
   

//  UIColor+Addition.m#import "UIColor+Addition.h"@implementation UIColor (Addition)+ (instancetype)colorWithHex:(uint32_t)hex {    uint8_t r = (hex & 0xff0000) >> 16;    uint8_t g = (hex & 0x00ff00) >> 8;    uint8_t b = hex & 0x0000ff;    return [self colorWithRed:r green:g blue:b];}+ (instancetype)randomColor {    return [UIColor colorWithRed:arc4random_uniform(256) green:arc4random_uniform(256) blue:arc4random_uniform(256)];}+ (instancetype)colorWithRed:(uint8_t)red green:(uint8_t)green blue:(uint8_t)blue {    return [UIColor colorWithRed:red / 255.0 green:green / 255.0 blue:blue / 255.0 alpha:1.0];}@end

转载地址：http://rykii.baihongyu.com/