文章目录

  • 1.定义
  • 2.TypeScript 类型模板
  • 3.为对象动态添加属性
    • 3.1 解决方法
    • 3.2 对象作为参数传递
    • 3.3 方法返回对象
    • 3.4 对象数组

1.定义

TypeScript 对象是包含一组键值对的实例。 值可以是标量、函数、数组、对象等，如下实例：

var object_name = { key1: "value1", // 标量key2: "value",key3: function() {// 函数}, key4:["content1", "content2"] //集合}//访问对象object_name.key1// value1object_name.key4// ["content1", "content2"]

2.TypeScript 类型模板

var sites = {site1: "",site2: 0,sayHello: function () { } // 类型模板};sites.site1 = "site1"sites.site2 = 2sites.sayHello = function () {console.log("hello " + sites.site1 + sites.site2);};sites.sayHello();// hello site1 2

3.为对象动态添加属性

如果我们使用以上的方法定义对象是无法做到为对象动态添加属性

let people = {name: "hwm",age: 18,sayHello: ()=> {}}people.sex = "man"

以上代码会报错：

3.1 解决方法

定义一个包含数组属性的接口，让对象实现该接口

interface obj {[idx: string]: any}let people: obj = {}people.name = "hwm"people.age = 18console.log(people)// { name: 'hwm', age: 18 }

3.2 对象作为参数传递

方法一：

private ParamObj(objT: {name: string, age: number}) { let people = objTconsole.log(objT)}let people = {name: "hwm", age: 18}this.ParamObj(people)// {name: "hwm", age: 18}

方法二：

interface obj {[idx: string]: any}private ParamObj(objT: obj) {let people = objT console.log(objT)}let people:obj = {}people.name = "lll"people.age = 20this.ParamObj(people)// {name: "lll", age: 20}

3.3 方法返回对象

private ReturnObj(): {name: string, age: number}{let people = {name: "hwm", age: 18}return people}let res = this.ReturnObj()console.log(res)// {name: "hwm", age: 18}

3.4 对象数组

let tbl: {name: string, age: number}[] = []