预加载完成后程序继续执行，没有停止请问是什么原因？
代码按老师说的敲，求大神指点。。。。
个回答
-
- aR_Easun
- 2018-02-08 14:39:50
//图片预加载_无序加载
(function($) {
function PreLoad(imgs, options) {
this.imgs = (typeof imgs === 'string') ? [imgs] : imgs;
this.opts = $.extend({}, PreLoad.DEFAULTS, options);
if(this.opts.order === 'ordered') {
this._ordered();
} else {
this._unordered();
}
}
PreLoad.DEFAULTS = {
order: 'unordered', //默认使用无序预加载
each: null, //每张图片加载完毕后执行
all: null, //所有图片加载完毕后执行
};
PreLoad.prototype._ordered = function() { //有序加载
var opts = this.opts,
imgs = this.imgs,
len = imgs.lenght,
count = 0;
load();
//有序预加载
function load() {
var imgObj = new Image();
$(imgObj).on('load error', function() {
opts.each && opts.each(cuont);
if(count >= len) {
//所以图片已经加载完毕
opts.all && opts.all();
} else {
load();
}
count++
});
imgObj.src = imgs[count];
}
},
PreLoad.prototype._unordered = 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);