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 // value1

object_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 = 2

sites.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 = 18

console.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 = objT

console.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 = 20

this.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}[] = []

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