jQuery调整图像大小

44
我想开始一场关于使用jQuery进行图像调整大小的讨论。
这是我的贡献:但我认为我离解决方案还很远。 裁剪怎么样? 谁能帮我?
$(document).ready(function() {
    $('.story-small img').each(function() {
    var maxWidth = 100; // Max width for the image
    var maxHeight = 100;    // Max height for the image
    var ratio = 0;  // Used for aspect ratio
    var width = $(this).width();    // Current image width
    var height = $(this).height();  // Current image height

    // Check if the current width is larger than the max
    if(width > maxWidth){
        ratio = maxWidth / width;   // get ratio for scaling image
        $(this).css("width", maxWidth); // Set new width
        $(this).css("height", height * ratio);  // Scale height based on ratio
        height = height * ratio;    // Reset height to match scaled image
    }

    // Check if current height is larger than max
    if(height > maxHeight){
        ratio = maxHeight / height; // get ratio for scaling image
        $(this).css("height", maxHeight);   // Set new height
        $(this).css("width", width * ratio);    // Scale width based on ratio
        width = width * ratio;    // Reset width to match scaled image
    }
});

});


你有没有想过为什么 var maxWidth = $(document).width(); 不能正常工作?看一下这个链接:http://jsfiddle.net/KHdZG/16/ - Mike
2
由于jQuery/javascript在客户端运行,如果服务器上的文件大小为2 MB,则浏览器仍然必须下载完整的2 MB才能呈现100x100像素的图像。正确吗? - user153923
14个回答

0

修改Aleksandar的答案,将其制作为jQuery插件,并接受Nathan建议的maxwidth和maxheight作为参数。

$.fn.resize = function(maxWidth,maxHeight) {
return this.each(function() {
    var ratio = 0;
    var width = $(this).width();
    var height = $(this).height();
    if(width > maxWidth){
        ratio = maxWidth / width;
        $(this).css("width", maxWidth);
        $(this).css("height", height * ratio);
        height = height * ratio;
    }
    var width = $(this).width();
    var height = $(this).height();
    if(height > maxHeight){
        ratio = maxHeight / height;
        $(this).css("height", maxHeight);
        $(this).css("width", width * ratio);
        width = width * ratio;
    }
});
};

用于 $('.imgClass').resize(300,50);


0
function resize() {resizeFrame(elemento, margin);};

jQuery.event.add(window, "load", resize);
jQuery.event.add(window, "resize", resize);
function resizeFrame(item, marge) {
  $(item).each(function() {
  var m = marge*2;
  var mw = $(window).width()-m; 
  var mh = $(window).height()-m;
  var w = $('img',this).width();
  var h = $('img',this).height();
  var mr = mh/mw;
  var cr = h/w;
  $('img',this).css({position:'absolute',minWidth:(w-w)+20,minHeight:(h-h)+20,margin:'auto',top:'0',right:'0',bottom:'0',left:'0',padding:marge});
    if(cr < mr){
        var r = mw/w;
        $('img',this).css({width: mw});
        $('img',this).css({height: h*r});
    }else if(cr > mr){
        var r = mh/h;
        $('img',this).css({height: mh});
        $('img',this).css({width: w*r});
    }
  });  
}

0

-1

imgLiquid(一个 jQuery 插件)似乎可以实现您所要求的功能。

Demo:
http://goo.gl/Wk8bU

JsFiddle 示例:
http://jsfiddle.net/karacas/3CRx7/#base

Javascript

$(function() {

    $(".imgLiquidFill").imgLiquid({
        fill: true,
        horizontalAlign: "center",
        verticalAlign: "top"
    });

    $(".imgLiquidNoFill").imgLiquid({
        fill: false,
        horizontalAlign: "center",
        verticalAlign: "50%"
    });
     });

HTML

<div class="boxSep" >
    <div class="imgLiquidNoFill imgLiquid" style="width:250px; height:250px;">
        <img alt="" src="http://www.juegostoystory.net/files/image/2010_Toy_Story_3_USLC12_Woody.jpg"/>
    </div>
</div>

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