使用变量标识符反应更新嵌套对象的状态

Question

您好，我无法在反应中更新嵌套对象状态。当我尝试这样做时，我在所有孩子中都遇到了错误（来自父母的未定义道具）。这是我的代码：    updateColumn(newSubject,dayId,order){        console.log("tu som");        console.log(newSubject);        console.log(dayId);        console.log(order);        console.log(this.state.schedule);        //Problematic part:        let newSchedule = this.state.schedule;        newSchedule.days[dayId].slots[order] = newSubject;        console.log("newSchedule");        console.log(newSchedule);        this.setState({schedule:this.state.schedule});        console.log("this new state");        console.log(this.state.schedule);        //State changed but error shows    }

Answer 1

尝试这个 ：

this.setState({...this.state, schedule: {

  ...this.state.schedule,

  days: {

     ...this.state.schedule.days,

     [dayId]: dayId,

     slots: {

      ...this.state.schedule.days.slots,

      [order] : newSubject

   }

})