设置button不同状态下的背景色,即把这个颜色变成图片设置成,背景图片
- (void)setBackgroundColor:(UIColor *)backgroundColor forState:(UIControlState)state { [self setBackgroundImage:[UIButton imageWithColor:backgroundColor] forState:state]; } + (UIImage *)imageWithColor:(UIColor *)color { CGRect rect = CGRectMake(0.0f, 0.0f, 1.0f, 1.0f); UIGraphicsBeginImageContext(rect.size); CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSetFillColorWithColor(context, [color CGColor]); CGContextFillRect(context, rect); UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return image; }