给出颜色生成图片

- (UIImage *) createImageWithColor: (UIColor *) color 
{   
    CGRect rect = CGRectMake(0.0f,0.0f,1.0f,1.0f);  

   UIGraphicsBeginImageContext(rect.size);   
   CGContextRef context =UIGraphicsGetCurrentContext();  
   CGContextSetFillColorWithColor(context, [colorCGColor]);  
    CGContextFillRect(context, rect);   
   UIImage *theImage =UIGraphicsGetImageFromCurrentImageContext();  
   UIGraphicsEndImageContext();   
    return theImage;   
}