以下这串json数据用来存储预加载的图片路径：
var imgData = [
{ name: "p1", src: "images/p1.jpg" },
{ name: "p2", src: "images/p2.jpg" },
{ name: "p3", src: "images/p3.jpg" },
{ name: "p4", src: "images/p4.jpg" },
{ name: "p5", src: "images/p5.jpg" }
]
下面这个函数可通过json每行的name来获取该行的路径src，让我们看一下代码：
function getData(name) {
var picArr = imgData;
var picSrc;
for (var i = 0; i < picArr.length; i++) {
var cur_person = picArr[i];
if (cur_person.name == name) {
picSrc = cur_person.src;
}
}
return picSrc;
}
函数执行后将返回该行的src。
var g = getData("p1");
console.log(g);
输出后即可看到结果为：images/p1.jpg