用法很简单，即拿即用。

例：UIButton 使用

    UIButton *btn = [UIButton cz_textButton:@"测试" fontSize:16 normalColor:
     [UIColor redColor] highlightedColor: [UIColor yellowColor]];
    btn.frame = CGRectMake(10, 100, 100, 50);
    [self.view addSubview:btn];

例：UILabel/UIScreen

    UILabel *lab = [UILabel cz_labelWithText:@"啦啦" fontSize:20 
    color:[UIColor redColor] ];
    lab.frame = CGRectMake(10, 200, [UIScreen cz_screenWidth], 50);
    [self.view addSubview:lab];

例：UIColor

 self.view.backgroundColor = [UIColor cz_randomColor];