我要评论
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}[] = []
发表评论