/**

• 根据颜色生成一张图片
• @param color 颜色
• @param size 图片大小
• @return 图片
  */

• (UIImage *)imageWithColor:(UIColor *)color size:(CGSize)size
  {
  if (color) {
  CGRect rect = CGRectMake(0, 0, size.width, size.height);
  UIGraphicsBeginImageContext(rect.size);
  CGContextRef context = UIGraphicsGetCurrentContext();
  CGContextSetFillColorWithColor(context,color.CGColor);
  CGContextFillRect(context, rect);
  UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
  UIGraphicsEndImageContext();

    return img;
  

  }
  return nil;
  }