Egret（白鹭）本地数据存储

1.字符串

    存：egret.localStorage.setItem('test','string');
    取：egret.localStorage.getItem('test');
    删：egret.localStorage.removeItem('test');
    清空所有:egret.localStorage.clear();

2.字典

     存：egret.localStorage.setItem('test', JSON.stringify(data));
     取：var data = JSON.parse(egret.localStorage.getItem('test'));
     删：egret.localStorage.removeItem('test');
     清空所有:egret.localStorage.clear();