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考虑以下函数。每次调整浏览器大小以及每次我想将相同的初始值传递this.original_ul给这个函数时都会调用它doLayout()。它仅在初始化函数中单独计算一次。现在发生的事情是第二次调用它时,对$ul变量的更改也正在反映 this.original_ul。我怎样才能防止这种情况?

doLayout : function () {
    alert('doLayout');
    var size, $ul, $lis, loop, i;
    size = this.computeElesPerCol();
    $ul = this.original_ul; // I wanna  preserve this between calls
    $lis = $ul.children().filter(':gt(' + (size - 1) + ')');
    loop = Math.ceil($lis.length / size);
    i = 0;

    $ul.css('float', 'left').wrap("<div style='overflow: hidden'></div>");

    for (; i < loop; i = i + 1) {
      $ul = $("<ul />").css('float', 'left').append($lis.slice(i * size, (i * size) + 4)).insertAfter($ul);
      $ul.css("list-style","none");
    }
  }

编辑: :this是对 javascript 对象 WebFloatLayout 的引用,它基本上根据每次调整浏览器大小时的可用高度进行多列布局。初始输入是<lis>单个<ul>. 这是它的初始化方式:

     initialize:function () {
    var webFloatLayout = this;
    //call super parent initialize which will set the main dom element of component
    ec.comp.Component.prototype.initialize.call(this);
    var innerDivId = this.id + "_inner";
    innerDivId = innerDivId.replace(new RegExp(ec.config.separator, "g"), "\\" + ec.config.separator);
    $(document).ready(function() {
      webFloatLayout.original_ul = $("#" + innerDivId).find(">:first-child");
      webFloatLayout.original_ul.css("list-style","none");
      webFloatLayout.layout();
    });
  },
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1 回答 1

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尝试克隆方法:

$ul = this.original_ul.clone();
于 2012-07-27T12:19:21.850 回答