反应传递新道具

Question

this.state.newDetails == null ? '' : 
    <NewDetailsView details={this.state.newDetails} /> 

import React, { Component } from 'react';

class NewDetailsView extends Component {
  constructor(props) {
    super(props);
    this.state = {
      details: (this.props.details!= null) ? this.props.details: null
    }
  }

  componentWillReceiveProps(nextProps) {
    this.setState({ details: nextProps });
    this.forceUpdate();
  }

  render() {
    return (
      <div>
        <input type="text" defaultValue={this.state.details.id} />
      </div>
    );
  }
}

export default NewDetailsView ;

悬而未决...

Answer 1

问题在ComponentWillReceiveProps中：

this.setState({ details: nextProps });

应该是：

this.setState({ details: nextProps.details });

并删除this.forceUpdate（）；，这里不需要forceUpdate。

<input type="text" value={this.state.details.id} />