Question

我有关于在回调函数中传递参数的问题。我使用redux-form，当我更改SkinList中的选择时，它会触发onChange回拨 - activeSkinChange方法

在activeSkinChange中，调用来自SkinList handlSkinChange属性的handlSkinChange。我需要将select值传递给handlSkinChange（event.target.value）

export default class SkinList extends Component {
  activeSkinChange = (event) => {
    this.props.handlSkinChange(event.target.value);
  }

  render() {
    const { skinList, activeSkin } = this.props;

    return (
      <div>
        <select className="form-control" onChange={this.activeSkinChange} value={activeSkin}>
          {this.renderOptions(skinList)}
        </select>
      </div>
    );
  }
}

然后移出SkinList：

export default class Control extends Component {
  onHandlSkinChange = (?, ?) => {

  };

  render() {
    return (
      <Field
        name="skin.colors.activeSkin"
        component={activeSkin =>
        <SkinList skinList={skinList} activeSkin={activeSkin} handlSkinChange={this.onHandlSkinChange(activeSkin)}/>
      }/>
    );
  }
}

handlSkinChange会触发回调this.onHandlSkinChange，我还需要在SkinList道具上的activeSkin中传递另一个参数this.onHandlSkinChange()，但它会遇到错误..

这意味着需要在onHandlSkinChange方法中传递两个参数，一个是选择值（event.target.value），另一个是activeSkin 在连续回调函数中，如何让我在回调函数中传递参数？有什么想法吗？

Answer 1

export default class SkinList extends Component {
    activeSkinChange (event){
        this.props.handlSkinChange(event.target.value);
    }

    render() {
        const { skinList, activeSkin } = this.props;
        return (
            <div>
                <select className="form-control" onChange={this.activeSkinChange.bind(this)} value={activeSkin}>
                    {this.renderOptions(skinList)}
                </select>
            </div>
        );
    }
}

export default class Control extends Component {
  onHandlSkinChange (value, activeSkin ) {
     console.log("CHECK",value,activeSkin);
  }

  render() {
    return (
      <Field
        name="skin.colors.activeSkin"
        component={activeSkin => <SkinList skinList={skinList} activeSkin={activeSkin}
         handlSkinChange={v=>this.onHandlSkinChange(v,activeSkin)}/>
      }/>
    );
  }
}

React_Redux：在连续回调函数

1 个答案: