//根據顏色建立一個圖片 + (UIImage *)createImageWithColor:(UIColor *)color rect:(CGRect)rect { UIGraphicsBeginImageContext(rect.size); CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSetFillColorWithColor(context, [color CGColor]); CGContextFillRect(context, rect); UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return theImage; }
而後就能夠調用這個方法建立了一個UIImage的對象,接着就能夠直接調用系統的- (void)setBackgroundImage:(UIImage *)image forState:(UIControlState)state 這個方法設置默認和高亮的顏色了,很方便。code