iOS开发集锦

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];
}