Question

我正在使用react-redux实现react-bootsrap轮播，并且我在标题中收到了错误。

我使用受控转盘，当转盘自动更改幻灯片时会显示错误消息。

当用户点击上一个时。下一个按钮并手动更改它们似乎都没问题。

如果我将道具或类似的道具或选项添加到道具或类似物中，我不会得到它吗？

这是我的代码：

容器：

import React, { Component } from 'react'
import { connect } from 'react-redux'
import { Link } from 'react-router'
import store from 'store/configureStore'
import Slides from 'components/SlideShow'
import { getInitalSlides, handleSelect } from 'actions/SlidesActions'

class Home extends Component {

constructor(props) {
    super(props)
    this.state = {
        index: null,
        direction: null
    }
    this.handleSelect = this.handleSelect.bind(this)    

static fetchData({ store }) {
        return store.dispatch(getInitalSlides())
    }

    componentDidMount() {
        this.props.getInitalSlides()
    }

handleSelect(selectedIndex, e) {
        //alert(e)
        this.props.handleSelect(selectedIndex, e)
    }

  render() {
    return (
      <div className="Home">
        <h1>Home Page</h1>
        <Slides 
        slides={this.props.slides}   
        getInitialState={this.state.index} 
        getInitialStateD={this.state.direction}
        slidesControl={this.handleSelect}
        />
        <div><Link to="/question">to question</Link></div>
        <div><Link to="/posts">to posts</Link></div>
      </div>
    )
  }
}

function mapStateToProps (state) {
  const { slides, handleSelect } = state

  return { slides: state.slides, onSelect: state.handleSelect } 
}

export { Home }
export default connect(mapStateToProps { getInitalSlides, handleSelect})(Home)

以下是组件中的相关位：

    render() {

    return (
      <Carousel 
      activeIndex={this.props.getInitialState} 
      direction={this.props.getInitialStateD} 
      onSelect={(selectedIndex,e)=>this.props.slidesControl(selectedIndex,e)}
      >
      {

      this.props.slides.map((s)=>{
              let id = s.get('id')
              let title = s.get('title')
              let image = s.get('image')
              let alt = s.get('alt')
              let caption = s.get('caption')
              return(

                    <Carousel.Item key={id} >
                    <img width={900} height={500} alt={s.get('alt')} src={image} alt={alt}/>
                    <Carousel.Caption>
                      <h3>{title}</h3>
                      <p>{caption}</p>
                    </Carousel.Caption>
                  </Carousel.Item>

              )
      }) 



    }
    </Carousel>)
  }
}

编辑：这是相关的react-bootstrap轮播代码（抛出错误的地方）

  var onSelect = this.props.onSelect;

  if (onSelect) {
    if (onSelect.length > 1) {
      // React SyntheticEvents are pooled, so we need to remove this event
      // from the pool to add a custom property. To avoid unnecessarily
      // removing objects from the pool, only do this when the listener
      // actually wants the event.
      e.persist();
      e.direction = direction;

      onSelect(index, e);
    } else {
      onSelect(index);
    }
  }

Answer 1

我分析了Carousel.js的{{1}}代码，我怀疑它是react-bootstrap库本身的问题。

There is this line triggering change in Carousel.js code：

react-bootstrap

this.timeout = setTimeout(this.next, this.props.interval);方法需要this.next类型的参数，但不会从SynteticEvent调用传递。这会显示您的错误消息：setTimeout。

该问题很可能已隐藏了很长时间but was exposed with this commit，其中事件参数实际上由Carousel.ja代码本身使用。

所以我建议创建react-bootstrap Github问题，同时降级到不包含上述提交的版本。

Answer 2

这是项目的github页面中的问题链接。似乎即将出现修复：

https://github.com/react-bootstrap/react-bootstrap/issues/2029

未捕获的类型错误：无法使用react-bootstrap轮播读取未定义的属性

2 个答案: