this.$watch(),this.$set(),this.$nextTick()=>{})

///组件生命周期 挂载到html文档中
//this.$watch可以下载mounted和update这种但是不能在methods中

mounted () {
    this.$watch('value.show',newValue=>{
        if (newValue){
            this.value.formData.learnPlanId = this.value.formData.id;
            delete this.value.formData.id;
            this.reset = false;
            this.$nextTick(()=>{
                this.reset = true;
            });
        }else {
            this.value.formData = {};
        }
    })
},


///这种主要用于当对象中某个属性值动态生成时处理方式this.$se()会在事件的下一次空闲时间执行，不知道什么时候执行但是一定会执行

const t = Number(this.value.formData.inTotal);
this.selectedQuestion.questionCount = t;
this.$set(this.selectedQuestion, 'questionCount', t);

///$nextTick 是在下次 DOM 更新循环结束之后执行延迟回调

 this.$nextTick(()=>{
                this.reset = true;
            });