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主题

Egret在localStorage存储读取JSON对象的方法

一、存储数据 ​

数据 obj ​

json
let data = [
{ usernametext: 'test1', money: 100, PlayerId: 1},
{ usernametext: 'test2', money: 200, PlayerId: 2},
{ usernametext: 'test3', money: 200, PlayerId: 3},
{ usernametext: 'test4', money: 200, PlayerId: 4},
{ usernametext: 'test5', money: 200, PlayerId: 5}
];
JavaScript
//将JSON对象转化成字符串
let data: string = JSON.stringify(obj);
//用localStorage保存转化好的的字符串
egret.localStorage.setItem("userdata", data);
//egret.localStorage.setItem(key, value);

通过上面的方法，localStorage 中储存的数据为下面的数据

json
[
{"usernametext":"test1","money":100,"PlayerId":1},

{"usernametext":"test2","money":200,"PlayerId":2},

{"usernametext":"test3","money":200,"PlayerId":3},

{"usernametext":"test4","money":200,"PlayerId":4},

{"usernametext":"test5","money":200,"PlayerId":5}
]

二、读取数据 ​

JavaScript
//重新转换为对象 
let data: string = egret.localStorage.getItem("userdata");
//let data:string = egret.localStorage.getItem(key);
//把字符串转换成JSON对象
data = JSON.parse(data);

读取对象的某个属性 ​

JavaScript
this.lNameText[2].text = data[2]['usernametext']

三、移除数据 ​

JavaScript
egret.localStorage.removeItem(userdata);
//egret.localStorage.removeItem(key);

四、清除所有数据 ​

JavaScript
egret.localStorage.clear();