自定义显示加载等待图片插件(loading.git)

 

在工作中遇到了一个问题 —— 某个业务流程分为几个阶段，每个阶段如果在数据没有显示出来之前就要显示加载图片loading.gif文件，如果有数据了就消失。为此，自己写了一个方法，方便整个工程使用。

 

<button onclick="show()">show</button>
<button onclick="hide()">hide</button>

<script>
//创建加载对象
var obj = new loadingImg();

//显示加载图片
function show(){
obj.show();
}

//隐藏加载图片
function hide(){
obj.hide();
}

//加载图片方法（对象）
function loadingImg(mySetting){
var that = this;
if(mySetting == "" || mySetting == undefined || typeof mySetting != "object"){
mySetting = {};
}
//使用时间戳作为空间的ID
var targetID = new Date().getTime();

this.setting = {
//插入图片的容器,使用jquery的查询方式传入参数
targetConater : "",
//使用图片的地址
imgUrl : "../img/loading.gif",
//图片显示的 宽度
imgWidth : "32px",
//图片的默认样式
imgClass : "",
//生成控件的ID
"targetID" : targetID,
//显示之前的回调函数
beforeShow : function(plugin){
},
//显示之后的回调函数
afterShow : function(plugin,targetID){
}
}

this.setting = $.extend(this.setting, mySetting);

//获取屏幕的宽度
this.getScreenWidth = function(){
return document.documentElement.clientWidth;
}

//获取屏幕的高度
this.getScreenHeight = function (){
return document.documentElement.clientHeight;
}

//显示控件
this.show = function(){
$("#" + that.setting.targetID).show();
}

//隐藏控件
this.hide = function(){
$("#" + that.setting.targetID).hide();
}

this.init = function(){
//显示之前执行回调函数
if(typeof that.setting.beforeShow == "function"){
that.setting.beforeShow(that);
}

//存放字符串的变量
var targetHTML = '';
//将内容存放到指定的容器中，默认存放到body最底部
if(that.setting.targetConater != "" && this.setting.targetConater != undefined){
targetHTML = '<img src="' + that.setting.imgUrl + '" class="' + that.setting.imgClass + '" id="' + that.setting.targetID + '" style="display:none;">';
$(that.setting.targetConater).html(targetHTML);
}else{
targetHTML = '<img src="' + that.setting.imgUrl + '" class="' + that.setting.imgClass + '">';
targetHTML = '<div  id="' + that.setting.targetID + '" style="display:none;position: absolute;top:50%;left: 50%;height: ' + that.getScreenHeight()+';width:'+that.getScreenWidth()+'">' + targetHTML + '</div>';
$("body").append(targetHTML);
}

//判断用户是否自定义了图片的宽度
if(that.setting.imgWidth != "" && that.setting.imgWidth.indexOf("px")>0 ){
$("#"+targetID).css("width",that.setting.imgWidth);
}

//显示之后执行回调函数
if(typeof that.setting.afterShow == "function"){
that.setting.afterShow(that,targetID);
}
}

this.init();

}

</script>

 

 

 





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