单例模式
1 var mySingleton = (function(){
2 var instance;
3 function init(){
4 function privateMehod(){
5 console.log(111);
6 };
7 var privateVar = '11111';
8 var privateRandomNumber = Math.random();
9 return {
10 publicMethod:function(){
11
12 },
13 publicVar:2222,
14 getRandomNumber:function(){
15 return privateRandomNumber
16 }
17 }
18 };
19 return {
20 getInstance: function(){
21 if(! instance){
22 instance = init();
23 };
24 return instance
25 }
26 }
27 })();
调用方式：
1. mySingleton // getInstance:function(){}
2. mySingleton.getInstance() // publicMethod: function, publicVar: 2222, getRandomNumber: function
3. mySingleton.getInstance().publicVar //222
