reactjs - Reactjs 中的状态问题

Question

我在子组件中有下面的 JSX。

<td>
  <div>
    {this.props.image_element} 
  </div> 
</td>

我function在父组件中如下所示

image_element= (image_name) => {        
        if(image_name) {
            this.update_photostatus('image');
        }
        else {
            console.log('hello');
            this.update_photostatus('input');
        }
   }

和

update_photostatus = value => {
        this.setState({photostatus: value});
    }

我得到的输出console如下

和

Answer 1

Do not call setState within componentWillUpdate or componentDidUpdate or render method, unless you have conditionals that restrict that change (even then be careful). When you setState inside one of these, you are likely to get the Maximum update depth exceeded message back.