Question

我正在使用带有Green Sock动画工具的反应滑动旋转木马，并且我已经让滑块和动画工作了。现在的问题是当动画在幻灯片上结束时调用slickNext方法。无论我是否使用refs，我都会收到这个错误（但是我的＆＃34;测试＆＃34;正在工作并在控制台中显示）。这种方法的github文档有点微薄和令人困惑，我没有发现任何类似的情况，我可以用作参考。我该如何访问此方法？

import React, { Component } from "react";
import Helmet from "react-helmet";
import AnimationStory1 from "../../components/Animation/AnimationStory1";
import AnimationStory2 from "../../components/Animation/AnimationStory2";
import AnimationStory3 from "../../components/Animation/AnimationStory3";
var Slider = require("react-slick");

export default class IntroStory extends Component {

  constructor (props) {
    super(props);
    this.state = {};
  }

  nextSlide () {
    console.log("test");
    this.refs.slider.slickNext();
  }

  render () {
//These are GreenSock animation instances
    var timeline1 = new TimelineLite({onComplete: this.nextSlide});
    var timeline2 = new TimelineLite();
    var timeline3 = new TimelineLite();

//These are settings for the react-slick slider
    var settings = {
      dots: true,
      infinite: true,
      speed: 500,
      slidesToShow: 1,
      slidesToScroll: 1,
//      slide: true,
      swipe: true,
      accessibility: true,
      arrows: false,
      beforeChange: function () {
        timeline1.restart();
        timeline2.restart();
        timeline3.restart();
      }
    };

    return <div>
      <Helmet title="Welcome to We Vote" />
      <div className="container-fluid well u-gutter__top--small fluff-full1 intro-story">
        <Slider ref="slider" {...settings}>
          <div key={1}><AnimationStory1 timeline1={timeline1}/></div>
          <div key={2}><AnimationStory2 timeline2={timeline2}/></div>
          <div key={3}><AnimationStory3 timeline3={timeline3}/></div>
          <div key={4}><p>This will be an image</p></div>
         </Slider>
      </div>
    </div>;
  }
}

Answer 1

绑定您的方法以确保上下文this得到处理：

 render () {
//These are GreenSock animation instances
    var timeline1 = new TimelineLite({onComplete: this.nextSlide.bind(this)});
    var timeline2 = new TimelineLite();
    var timeline3 = new TimelineLite();

当你刚过去的时候， var timeline1 = new TimelineLite({onComplete: this.nextSlide}) 您实际上只是专注于传递回调，但方法nextSlide使用this上下文，并且在调用回调时，您需要确保this具有refs在他们中调用slider。 Read more here

react-slick slickNext方法 - ＆＃34; Uncaught TypeError：无法读取属性＆＃39; slider＆＃39;未定义＆＃34;

1 个答案: