为应用程序中的常用颜色等创建实用程序类

@implementation UIColor (CustomColors)

+ (UIColor *)mb_toolBarTintColor {
    return [UIColor colorWithHue:0.5 saturation:0.1 brightness:0.3 alpha:1];
}

@end

[self.toolBar setTintColor:[UIColor mb_toolBarTintColor]];

UIColor

#define TEXT_COLOR [UIColor colorWithRed:0.8f green:0.8f blue:0.8f alpha:1.0f]