js闭包问题

function picLinkInit(parentClassName, imgW, imgH, childClassObjs) {
var $match = $(parentClassName);
var mWidth = Math.floor($match.width());

var mHeight = computeHeight(mWidth, imgW, imgH);
$match.css({
"width": mWidth,
"height": mHeight
});
for (var i = 0; i < childClassObjs.length; i++) {
var childClassObj = childClassObjs[i];

        $(childClassObj.cName).css({
"width": Math.floor(mWidth * childClassObj.ratioMoleculeW / childClassObj.ratioDenominatorW),
// "background": "rgba(9,200,200,0.5)",
"height": Math.floor(mHeight * childClassObj.ratioMoleculeH / childClassObj.ratioDenominatorH)
        });
/* if (childClassObj.url) {
            $(childClassObj.cName).click(function () {
                window.location.href =childClassObj.url;
            });
        }*/
(function (i) {
if ( childClassObjs[i].url) {
                $( childClassObjs[i].cName).click(function () {
                    window.location.href = childClassObjs[i].url;
                });
            }
        })(i);

    }
}

闭包表现:js没有块级元素，数组记录的是最后一个的 。跟作用域等有关。

封装成内部函数，把i传人进内部函数，这样外部函数不会调用到内部函数的变量。

(function (i) {
if ( childClassObjs[i].url) {
                $( childClassObjs[i].cName).click(function () {
                    window.location.href = childClassObjs[i].url;
                });
            }
        })(i);