【备战春招】第2天 TS之面向对象：类

课程名称：GO开发工程师

课程章节：6-3节：TS之面向对象：类

课程讲师： ccmouse

课程内容：

一. 类

关键字public：构造函数中的形参前面增加关键字public,等同于类相应的字段
关键字private：设置私有变量

getter与setter：
通过setter bonus设置私有变量allocatedBonus，智能提示是setter bonus，打印出来的字段是私有变量 allocatedBonus

继承：
注意子类与基类 public定义的字段不能重复

代码示例：

class Employee {
  private allocatedBonus?: number
  constructor(public name: string, public salary: number) { }
  set bonus(v: number) {
    this.allocatedBonus = v
  }
  get bonus() {
    return this.allocatedBonus || 0
  }
}
class Manager extends Employee {
  private reporters: Employee[]
  constructor(name: string, salary: number) {
    super(name, salary)
    this.reporters = []
  }
  addReporter(e: Employee) {
    this.reporters.push(e)
  }
}
const emp1 = new Employee('john', 8000)
emp1.bonus = 20000
console.log(emp1)
const manager1 = new Manager('mary', 18000)
manager1.addReporter(emp1)
manager1.bonus = 50000
console.log(manager1)

课程收获：

1. 类的定义
2. 关键字public、private
3. 通过getter、setter设置或者获取值
4. 类的继承注意子类与基类 构造函数public形参不能冲突