# preload
**Repository Path**: JqueryObjects/preload
## Basic Information
- **Project Name**: preload
- **Description**: 图片预加载之无序加载
- **Primary Language**: JavaScript
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No
## Statistics
- **Stars**: 0
- **Forks**: 0
- **Created**: 2019-08-05
- **Last Updated**: 2020-12-19
## Categories & Tags
**Categories**: Uncategorized
**Tags**: None
## README
# 图片预加载之无序加载
效果如下：
基于jquery写的预加载功能插件
```angularjs
/**
* 图片预加载
*/
(function ($) {
function Preload(imgs,options) {
this.imgs = (typeof imgs === "string")?[imgs]:imgs;
this.opts = $.extend({},Preload.DEFAULTS,options);
this._unoredered();
}
Preload.DEFAULTS = {
/**
* 每张图片加载完毕后执行
*/
each:null,
/**
* 所有图片加载完毕后执行
*/
all:null,
};
Preload.prototype._unoredered = function () {
/**
* 无序加载
*/
var imgs = this.imgs,
opts = this.opts,
count = 0,
len = imgs.length;
$.each(imgs,function (i,src) {
if(typeof src != "string") return;
var imgObj = new Image();
$(imgObj).on("load error",function () {
opts.each && opts.each(count);
if(count >= len -1){
opts.all && opts.all();
}
count ++;
});
imgObj.src = src;
});
};
$.extend({
preload:function (imgs,opts) {
new Preload(imgs,opts)
}
})
})(jQuery);
```
页面调用
```angularjs
var imgs = [
"images/1.jpg",
"images/2.jpg",
"images/3.jpg",
"images/4.jpg",
"images/5.jpg",
"images/6.jpg",
"images/7.jpg"
],
index = 0,
len = imgs.length,
$progress = $(".progress");
$.preload(imgs,{
each:function (count) {
$progress.html(Math.round((count + 1)/len * 100) + "%");
},
all:function () {
$(".loading").hide();
document.title = "1/"+len;
}
});
$(".btn").click(function () {
if($(this).data("control") === "prev"){
//上一张
index = Math.max(0,--index);
}else {
index = Math.min(len - 1,++index)
}
document.title = (index + 1) + "/" + len;
$("#img").attr("src",imgs[index]);
})
```
html+css
````angularjs
图片预加载之无序加载
````