/** 
 *  color转image 
 */ 
- (UIImage*)createImageWithColor: (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 *theImage = UIGraphicsGetImageFromCurrentImageContext(); 
    UIGraphicsEndImageContext(); 
    return theImage; 
}