图片拉伸

+(UIImage*)wlisWithImage:(NSString *)name{

    //获取图片

    UIImage * img=[UIImage imageNamed:name];

    //获取图片宽

    CGFloat imgW=img.size.width;

    //获取图片高

    CGFloat imgH=img.size.height;

    //获取可拉伸的图片

    return [img resizableImageWithCapInsets:UIEdgeInsetsMake(imgH*0.5, imgW*0.5, imgH*0.5, imgW*0.5) resizingMode:UIImageResizingModeTile];

}

/**

 以前的拉伸图片

 */

+(UIImage *)stretchableImage:(NSString *)name{

    //获取图片

    UIImage * img=[UIImage imageNamed:name];

    //获取图片宽

    CGFloat imgW=img.size.width;

    //获取图片高

    CGFloat imgH=img.size.height;

    /**

     leftCapWidth = width - leftCapWidth - 1

     topCapHeight = height - topCapWidth - 1

     */

    return [img stretchableImageWithLeftCapWidth:imgW*0.5 topCapHeight:imgH*0.5];

}

xcode UIImage图片拉伸

原文：http://www.cnblogs.com/fleas/p/5565343.html