我是React的新手,我想使用React-Bootstrap Modal.这段代码很好用,但是我想做的是在Trigger组件中没有按钮,而是在另一个父组件中使用它,以便可以从父组件中的按钮调用Trigger组件.

let Button = ReactBootstrap.Button;
let Modal = ReactBootstrap.Modal;

class Trigger extends React.Component{
    constructor(props){
        super(props);
        this.state = { show: false };
    }
    render(){
        let close = () => this.setState({ show: false});
        return (
      <div className="modal-container" style={{height: 1000}}>
        <Button
          bsStyle="primary"
          bsSize="large"
          onClick={() => this.setState({ show: true})}
        >
          Launch contained modal
        </Button>

        <Modal
          show={this.state.show}
          onHide={close}
          container={this}
          aria-labelledby="contained-modal-title"
        >
          <Modal.Header closeButton>
            <Modal.Title id="contained-modal-title">Edit Recipe</Modal.Title>
          </Modal.Header>
          <Modal.Body>
                 <form className="form-group">
                     <label>Recipe</label>
                     <input type='text' className="form-control"/>
                     <label>Ingredients</label>
                     <textarea type='text' className="form-control"/>
                 </form>
          </Modal.Body>
          <Modal.Footer>
                <Button bsStyle="primary">Edit Recipe</Button>
            <Button onClick={close}>Close</Button>
          </Modal.Footer>
        </Modal>
      </div>
    );
    }
}

解决方法:

观察代码后,您会发现Modal get的onClick of Button启动了.组件中相应的状态更改是其状态的show属性.

我制作了以下jsFiddle,以展示如何从外部控制模式.

https://jsfiddle.net/sunnykgupta/5qrzt9uy/

总的来说,我们接受一个支持到组件中并支持更改(通过componentWillReceiveProps()).
在内部,我们维护一个状态以跟踪模式显示状态.

码：

let Button = ReactBootstrap.Button;
let Modal = ReactBootstrap.Modal;

class Trigger extends React.Component{
    constructor(props){
        super(props);
        this.state = { show: props.modal };
    }
    componentWillReceiveProps(nextProps){
        if(this.state.show!==nextProps.modal){
        this.setState({show: nextProps.modal})
      }
    }
    render(){
        let close = () => this.setState({ show: false});
        return (
      <div className="modal-container">
        <Modal
          show={this.state.show}
          onHide={close}
          container={this}
          aria-labelledby="contained-modal-title"
        >
          <Modal.Header closeButton>
            <Modal.Title id="contained-modal-title">Edit Recipe</Modal.Title>
          </Modal.Header>
          <Modal.Body>
                 <form className="form-group">
                     <label>Recipe</label>
                     <input type='text' className="form-control"/>
                     <label>Ingredients</label>
                     <textarea type='text' className="form-control"/>
                 </form>
          </Modal.Body>
          <Modal.Footer>
                <Button bsStyle="primary">Edit Recipe</Button>
            <Button onClick={close}>Close</Button>
          </Modal.Footer>
        </Modal>
      </div>
    );
    }
}

class Parent extends React.Component{
    constructor(props){
    super(props);
    this.state = {show: false}
  }
    render(){
    return <main>
      <Trigger modal={this.state.show}/>
      <Button
        bsStyle="primary"
        bsSize="large"
        onClick={() => this.setState({ show: true})}
        >
        Launch contained modal
      </Button>
    </main>
  }
}

ReactDOM.render(
  <Parent/>,
  document.getElementById('container')
);