//UIColor转UIImage

• (UIImage)createImageWithColor: (UIColor) color
  {
  CGRect rect=CGRectMake(0,0, 1, 1);
  UIGraphicsBeginImageContext(rect.size);
  CGContextRef context = UIGraphicsGetCurrentContext();
  CGContextSetFillColorWithColor(context, [color CGColor]);
  CGContextFillRect(context, rect);
  UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();
  UIGraphicsEndImageContext();
  return theImage;
  }