iOS 生成随机颜色（UIColor）

时间：2014-05-09 13:57:22 收藏：0 阅读：477

#import <UIKit/UIKit.h>

@interface UIColor (RandomColor)

+(UIColor *) randomColor;

@end

#import "UIColor+RandomColor.h"

@implementation UIColor (RandomColor)

+(UIColor *) randomColor

{

CGFloat hue = ( arc4random() % 256 / 256.0 ); // 0.0 to 1.0

CGFloat saturation = ( arc4random() % 128 / 256.0 ) + 0.5; // 0.5 to 1.0, away from white

CGFloat brightness = ( arc4random() % 128 / 256.0 ) + 0.5; // 0.5 to 1.0, away from black

return [UIColor colorWithHue:hue saturation:saturation brightness:brightness alpha:1];

}

@end

将随机生成的颜色绘制成图片。