iOS RGB颜色设置

UIColor * color = [UIColor colorWithRed:(x/255.0f) green:( y/255.0f)blue:(z/255.0f) alpha:1.0f];

 

 x,y,z的值参见RGB颜色表

 http://www.th7.cn/Program/IOS/201411/320219.shtml

 

一个宏

#define  UIColorFromRGB(rgbValue) [UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 green:((float)((rgbValue & 0xFF00) >> 8))/255.0 blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0]

UIColorFromRGB(0xF3F4F6);   0x＝html的#

 

1.生成随机颜色

- (UIColor *)randomColor {

        static BOOL seeded = NO;

        if (!seeded) {

            seeded = YES;

            (time(NULL));

        }

        CGFloat red = (CGFloat)random() / (CGFloat)RAND_MAX;

        CGFloat green = (CGFloat)random() / (CGFloat)RAND_MAX;

        CGFloat blue = (CGFloat)random() / (CGFloat)RAND_MAX;

        return [UIColor colorWithRed:red green:green blue:blue alpha:1.0f];

    }