/**
剪切圖片

@param image 圖片
@param width 寬
@param height 高

@return 剪切到指定大小
*/

• (UIImage)resizeImage:(UIImage)image withWidth:(CGFloat)width withHeight:(CGFloat)height;

• (UIImage)resizeImage:(UIImage)image withWidth:(CGFloat)width withHeight:(CGFloat)height
  {
  CGSize newSize = CGSizeMake(width, height);
  CGFloat widthRatio = newSize.width/image.size.width;
  CGFloat heightRatio = newSize.height/image.size.height;

  if(widthRatio > heightRatio)
  {
  newSize=CGSizeMake(image.size.widthheightRatio,image.size.heightheightRatio);
  }
  else
  {
  newSize=CGSizeMake(image.size.widthwidthRatio,image.size.heightwidthRatio);
  }

  UIGraphicsBeginImageContextWithOptions(newSize, NO, 0.0);
  [image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
  UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
  UIGraphicsEndImageContext();

  return newImage;
  }