现在用setState 设置更新state的值会报错

Question

报错如下
index.js:1 Warning: Can’t call setState on a component that is not yet mounted. This is a no-op, but it might indicate a bug in your application. Instead, assign to this.state directly or define a state = {}; class property with the desired state in the App component.

是因为版本更新了么 我需要设置什么

Answer 1

Dell 2020-08-16 14:45:45

页面还没挂载，你就反复重新调用setState造成的，代码你发上来看一下。

• 慕侠6607443 #1

  我也报了这样的错 
  class TodoList extends Component {
      constructor(props) {
          super(props)
          this.state = store.getState();
          this.handleInputChange = this.handleInputChange.bind(this);
          this.handleStoreChange = this.handleStoreChange.bind(this);
          this.hanldeButtonClick = this.hanldeButtonClick.bind(this);
          // 当前组件订阅store 只要store里的数据发生改变 subscribe里面函数就会被自动执行
          store.subscribe(this.handleStoreChange)
      }handleStoreChange() {
          this.setState(store.getState())
      }

• Dell 回复 慕侠6607443 #2

  全部代码贴上来