React native 如何在WebView中控制播放/暂停视频

我正试图通过React Native在WebView中播放和暂停视频。
但是当this.state.shouldPlay变为true时，下面的injectedJavaScript就不起作用了

请建议如何从React Native控制WebView中的视频。
由于性能问题，无法使用react本机视频

import * as React from 'react';
import { Component, useState, useEffect  } from 'react';
import { Text, View, StyleSheet, Image, TouchableOpacity} from 'react-native';
import {WebView} from 'react-native-webview';

export default class App extends Component {

  constructor(props) {
    super(props);
    this.state = {
      shouldPlay: false, // not play at default
    }
  }

  _handlePlayAndPause = () => {
    if (this.state.shouldPlay == false) {
      this.setState({shouldPlay: true });
    } else {
      this.setState({shouldPlay: false });
    };

  render() {
    const {shouldPlay } = this.state;

    return (
        <View style={styles.container}>
          { shouldPlay ? 
            <View>
              <WebView
                source={{ uri: www.url.com/sample.mp4 }}
                javaScriptEnabled = {true}
                injectedJavaScript=
                  {`document.getElementsByTagName("video")[0].play();`}
              />
            </View>
          :
            <View>
              <WebView
                source={{ uri: www.url.com/sample.mp4 }}
                javaScriptEnabled = {true}
                injectedJavaScript=
                  {`document.getElementsByTagName("video")[0].pause();`}
              />
            </View>
          }

          { shouldPlay ?
            <View>
              <TouchableOpacity onPress={ this._handlePlayAndPause } >  
                  <Ionicons name="ios-pause"/>
              </TouchableOpacity>
            </View>
          :
            <View>
              <TouchableOpacity onPress={ this._handlePlayAndPause } > 
                  <Ionicons name="ios-play-circle"/>
              </TouchableOpacity>
            </View>              
          }
        </View>
    )  
  }

}

import*as React from'React'；
从“react”导入{Component，useState，useffect}；
从“react native”导入{文本、视图、样式表、图像、TouchableOpacity}；
从“react native WebView”导入{WebView}；
导出默认类应用程序扩展组件{
建造师（道具）{
超级（道具）；
此.state={
shouldPlay:false，//默认情况下不播放
}
}
_handlePlayAndPause=（）=>{
if（this.state.shouldPlay==false）{
this.setState（{shouldlplay:true}）；
}否则{
this.setState（{shouldlplay:false}）；
};
render（）{
const{shouldlplay}=this.state；
返回(
{应该玩吗？
:
}
{应该玩吗？
:
}
)  
}
}

---

谢谢。

我遇到同样的问题，你能找到解决办法吗？

import * as React from 'react';
import { Component, useState, useEffect  } from 'react';
import { Text, View, StyleSheet, Image, TouchableOpacity} from 'react-native';
import {WebView} from 'react-native-webview';

export default class App extends Component {

  constructor(props) {
    super(props);
    this.state = {
      shouldPlay: false, // not play at default
    }
  }

  _handlePlayAndPause = () => {
    if (this.state.shouldPlay == false) {
      this.setState({shouldPlay: true });
    } else {
      this.setState({shouldPlay: false });
    };

  render() {
    const {shouldPlay } = this.state;

    return (
        <View style={styles.container}>
          { shouldPlay ? 
            <View>
              <WebView
                source={{ uri: www.url.com/sample.mp4 }}
                javaScriptEnabled = {true}
                injectedJavaScript=
                  {`document.getElementsByTagName("video")[0].play();`}
              />
            </View>
          :
            <View>
              <WebView
                source={{ uri: www.url.com/sample.mp4 }}
                javaScriptEnabled = {true}
                injectedJavaScript=
                  {`document.getElementsByTagName("video")[0].pause();`}
              />
            </View>
          }

          { shouldPlay ?
            <View>
              <TouchableOpacity onPress={ this._handlePlayAndPause } >  
                  <Ionicons name="ios-pause"/>
              </TouchableOpacity>
            </View>
          :
            <View>
              <TouchableOpacity onPress={ this._handlePlayAndPause } > 
                  <Ionicons name="ios-play-circle"/>
              </TouchableOpacity>
            </View>              
          }
        </View>
    )  
  }

}