#import "UIColor+RandomColor.h"
@implementation UIColor (RandomColor)
+ (UIColor *)randomColor {
return [self colorWithRed:arc4random() % 256 / 255.0 green:arc4random() % 256 / 255.0 blue:arc4random() % 256 / 255.0 alpha:1.0];
}
@end
原文：http://blog.csdn.net/snn5love11314/article/details/40654187