状态模式

  • 它主要用来解决对象在多种状态转换时，需要对外输出不同的行为的问题。状态和行为是一一对应的，状态之间可以相互转换
  • 例如 抽奖活动有很多的状态和对应的行为
  • 在 getter setter 直接进行转发到合适的行为

    代码实现

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    class State {
        tmp: string
        set store(state: string){
            if(this.tmp !== state){
                this.tmp = state
            }
        }
        get store(): string {
            return this.tmp
        }
    }
     
    class People {
        state: State
        constructor(state: State){
            this.state = state
        }
    }
     
    const state = new State()
    const people = new People(state)
     
    state.store = 1
    console.log(people.state.store)
    class State {
        tmp: string
        set store(state: string){
            if(this.tmp !== state){
                this.tmp = state
            }
        }
        get store(): string {
            return this.tmp
        }
    }
     
    class People {
        state: State
        constructor(state: State){
            this.state = state
        }
    }
     
    const state = new State()
    const people = new People(state)
     
    state.store = 1
    console.log(people.state.store)

参考链接