Javascript 无法读取属性'；设置状态'；未定义ReactJS的定义

我试图在函数内的React中设置状态，但收到一条错误消息，指出：无法读取未定义的属性“setState”

下面是我的代码，我在构造函数中调用状态，然后在addTimes函数中设置状态并将其绑定到该函数，但是仍然会出现错误

class Settings extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      times: []
    };

  }
  render(){
    Array.prototype.remove = function() {
        var what, a = arguments, L = a.length, ax;
        while (L && this.length) {
            what = a[--L];
            while ((ax = this.indexOf(what)) !== -1) {
                this.splice(ax, 1);
            }
        }
        return this;
    };

    var currentTicked = [];
    var times =[]
    function addTimes(id){
      var index = times.indexOf(id);
      if (!times.includes(id)) {
        $("input:checkbox[name=time]:checked").each(function(){
          currentTicked.push($(this).val());
          times = times.concat(currentTicked)
          times = jQuery.unique(times);
        });
      } else if(times.includes(id)){
        times.remove(id)
      }
      console.log(times);
      addTimes = () => {
        this.setState({
          times: times
        });
      }
    }

---

尝试使用箭头功能：

addTimes = id => {
      var index = times.indexOf(id);
      if (!times.includes(id)) {
        $("input:checkbox[name=time]:checked").each(function(){
          currentTicked.push($(this).val());
          times = times.concat(currentTicked)
          times = jQuery.unique(times);
        });
      } else if(times.includes(id)){
        times.remove(id)
      }
      console.log(times);
      addTimes = () => {
        this.setState({
          times: times
        });
      }
    }

或者，在

addTimes

函数中绑定

this

，如下所示：

constructor(props) {
    super(props);
    this.state = {
      times: []
      this.addTimes = this.addTimes.bind(this);
    };

  }

---

最好使用es6语法。试试下面的代码

 class Settings extends React.Component {
    constructor(props) {
     super(props);
     this.state = {
       times: []
      };

    let times = [];
    let currentTicked = [];
    this.addTimes = this.addTimes.bind(this);
    }
     addTimes(id) {
        let index = times.indexOf(id);
        if (!times.includes(id)) {
            $("input:checkbox[name=time]:checked").each(function(){
              currentTicked.push($(this).val());
              times = times.concat(currentTicked)
              times = jQuery.unique(times);
            });
          } else if(times.includes(id)){
            times.remove(id)
          }
          this.setState({
            times: times
          });
    }
    render(){
    this.addTimes;
    return (
        Array.prototype.remove = function() {
            var what, a = arguments, L = a.length, ax;
            while (L && this.length) {
                what = a[--L];
                while ((ax = this.indexOf(what)) !== -1) {
                    this.splice(ax, 1);
                }
            }
            return this;
        }
    );
    }
}

---

您尚未将函数绑定到类。试着做

addTimes = (id) => {
  // code here
}

---

在组件类中

这对我来说很奇怪`addTimes=（）=>{this.setState（{times:times}）；}`。为什么不直接把` this.setState（{times:times}）`还有，为什么要在每次渲染时在数组的原型中重新定义函数

remove

？