rn 拍摄/预览视频react-native-image-picker和react-native-video

素颜马尾好姑娘i 2021-07-24 20:31 618阅读 0赞

1、配置react-native-image-picker
    	
            const options = {
            title: '上传视频',
            cancelButtonTitle:'取消',
            takePhotoButtonTitle:'拍摄',
            videoQuality:'low',   设置视频质量
            mediaType:'video',	  设置媒体格式
            chooseFromLibraryButtonTitle:'从本地相册导入',
            storageOptions: {
              skipBackup: true,
              path: 'images',
            },
          };
    
          ImagePicker.showImagePicker(options, (response) => {
            console.log('Response = ', response);
          
            if (response.didCancel) {
              console.log('User cancelled image picker');
            } else if (response.error) {
              console.log('ImagePicker Error: ', response.error);
            } else if (response.customButton) {
              console.log('User tapped custom button: ', response.customButton);
            } else {
              const source = { uri: response.uri };
    			
    		 视频地址回调
              this.setState({
                videoPreview:source
              });
            }
          });
    
     2、显示视频
        <Video 
         ref={(video)=>{this.video=video}}
         source={this.state.videoPreview} //视频回调设置的地址,url或本地文件,{require('xx.mp4')}
         volume={5} //放大声音倍数
         paused={this.state.paused}  //是否暂停
         rate={this.state.rate}  //播放速度,0暂停,1正常
         muted={false}  //静音
         resizeMode='contain' //视频适应方式
         repeat={false} //是否重复播放
         // controls={true}  //显示视频控键
         onLoadStart={this.onLoadStart}
         onLoad={this.onLoad}
         onProgress={this.onProgress}  //视频播放每隔250毫秒触发,并携带当前已播放时间
         onEnd={this.onEnd}
         onError={this.onError}
         style={styles.video}
         
         
     />

代码示例:

import React,{ Component} from 'react'
    import { 
      View,
      Text,
      StyleSheet,
      TouchableOpacity,
      ActivityIndicator,
      TouchableWithoutFeedback,
      Dimensions
    } from 'react-native'
    import ImagePicker from 'react-native-image-picker';
    import Video from 'react-native-video';
    
    class Vedio extends Component{ 
    
        state={ 
            videoPreview:false,
            rate:1,
            videoReady:false,
            videoTotal:0,
            currentTime:0,
            videoProgress:0,
            paused:true,
            comments:[],
            value:'',
        }
        //加载过程获取视频总时长,onProgree内此时无法获取
        onLoad=(res)=>{ 
            this.setState({ 
                videoReady:true,
                videoTotal:res.duration
            })
        
        }
    
        //视频开始隐藏重新播放按钮
        onLoadStart=()=>{ 
            
    
        }
        
        //自定义进度条
        onProgress=(data)=>{ 
            let duration=this.state.videoTotal;
            let currentTime=data.currentTime;
            let percent=0;
    
            //初始加载时duration=0
            console.log(duration)
            console.log(currentTime)
            if(duration!=0)
            { 
                percent=Number((currentTime/duration).toFixed(2));
            }else{ 
                percent=0
            }
            
            console.log( percent);
            this.setState({ 
                videoTotal:duration,
                currentTime:currentTime,
                videoProgress:percent,
                paused:false
            })
        }
        //视频结束显示重新播放按钮
        onEnd=()=>{ 
            this.setState({ 
                videoProgress:1,
                paused:true   //结束时必须设置暂停,使用seek方法才有效
            })
        }
        onError=(err)=>{ 
            console.log(err);
    
        }
    
        //点击按钮重新播放
        _replay=()=>{ 
            if(this.state.videoProgress==1)
            { 
                this.video.seek(0);
            }
            
            this.setState({ 
                paused:false
            })
    
        }
    
        //配置视频
        video=()=>{ 
            const options = { 
                title: '上传视频',
                cancelButtonTitle:'取消',
                takePhotoButtonTitle:'拍摄',
                videoQuality:'low',
                mediaType:'video',
                chooseFromLibraryButtonTitle:'从本地相册导入',
                storageOptions: { 
                  skipBackup: true,
                  path: 'images',
                },
              };
    
              ImagePicker.showImagePicker(options, (response) => { 
                console.log('Response = ', response);
              
                if (response.didCancel) { 
                  console.log('User cancelled image picker');
                } else if (response.error) { 
                  console.log('ImagePicker Error: ', response.error);
                } else if (response.customButton) { 
                  console.log('User tapped custom button: ', response.customButton);
                } else { 
                  const source = {  uri: response.uri };
        
                  this.setState({ 
                    videoPreview:source
                  });
                }
              });
    
        }
    
        render()
        { 
            return(
    
                <View style={ { alignItems:'center'}}>
                    <View style={ styles.header}>
                        <Text style={ styles.tit}>录制视频</Text>
                    </View>
                    { 
                        this.state.videoPreview?
                        <View style={ { width:'100%'}}>
                            <TouchableWithoutFeedback
                                //点击视频暂停/播放 
                                onPress={ ()=>{ 
                                    this.setState({ 
                                        paused:!this.state.paused,
                                    })
                                }}
                            >
                                <Video 
                                    ref={ (video)=>{ this.video=video}}
                                    source={ this.state.videoPreview} //url或本地文件,{require('xx.mp4')}
                                    volume={ 5} //放大声音倍数
                                    paused={ this.state.paused}  //是否暂停
                                    rate={ this.state.rate}  //播放速度,0暂停,1正常
                                    muted={ false}  //静音
                                    resizeMode='contain' //视频适应方式
                                    repeat={ false} //是否重复播放
                                    // controls={true} //显示视频控键
                                    onLoadStart={ this.onLoadStart}
                                    onLoad={ this.onLoad}
                                    onProgress={ this.onProgress}  //视频播放每隔250毫秒触发,并携带当前已播放时间
                                    onEnd={ this.onEnd}
                                    onError={ this.onError}
                                    style={ styles.video}
                                    
                                    
                                />
                            </TouchableWithoutFeedback>
                            { /* 进度条 */}
                            <View style={ styles.progressBox}>
                                <View style={ [styles.progress,{ width:Dimensions.get('window').width*this.state.videoProgress}]}></View>
                            </View>
                            { /* 若不设置重复播放,视频结束显示重新播放按钮 */}
                            { 
                                this.state.paused? 
                                            <TouchableOpacity style={ styles.wrap2}
                                                onPress={ this._replay}
                                            >
                                                <View style={ styles.play}>
                                                        <Text style={ { color:'#ccc',fontSize:30,lineHeight:50,marginLeft:5,marginBottom:5}} >▶</Text>
                                                </View>
                                            </TouchableOpacity>
                                            :<View></View>
                            }
                            
                            { /* 加载圆圈 */}
                            { 
                                this.state.videoReady? <View></View>: <View
                                                style={ styles.load}
                                            >
                                            <ActivityIndicator 
                                                size={ 70}
                                                color='#ccc'
                                                animating={ !this.state.videoReady}
                                            />
                                        </View>
                            }
                        </View>
                        
                        :
                        <TouchableOpacity style={ { width:'80%',marginTop:100}}
                            onPress={ this.video}
    
                        >
                            <View style={ styles.wrap}>
                                <Text style={ styles.txt1}>点我上传视频</Text>
                                <Text style={ styles.txt2}>建议时常不超过20秒</Text>
                            </View>
                        </TouchableOpacity>
                    }
                </View>
            )
        }
    }
    
    const styles = StyleSheet.create({ 
        header:{ 
            height:40,
            backgroundColor:'#FF8858',
            position:'relative',
            width:'100%'
        },
        tit:{ 
            color:'white',
            fontWeight:'bold',
            fontSize:20,
            textAlign:'center',
            lineHeight:40
        },
        wrap:{ 
            width:'100%',
            borderColor:'orange',
            borderWidth:1,
            borderRadius:5,
            justifyContent:'center',
            alignItems:'center',
        },
        txt2:{ 
            fontSize:14,
            color:'#ccc',
            marginTop:10
        },
        video:{ 
            width:'100%',
            height:300,
            backgroundColor:'black',
            justifyContent:'center',
            alignItems:'center',
            position:'relative'
        },
        load:{ 
            position:'absolute',
            left:'50%',
            top:'50%',
            marginLeft:-40,
            marginTop:-30
        },
        progressBox:{ 
            width:'100%',
            height:3,
            backgroundColor:'#ccc'
        },
        progress:{ 
            width:1,
            height:2,
            backgroundColor:'green'
        },
        wrap2:{ 
            position:'absolute',
            bottom:'40%',
            right:'45%',
        },
        play:{ 
            height:50,
            width:50,
            resizeMode:'contain',
            borderWidth:1,
            borderColor:'#ccc',
            borderRadius:50,
            justifyContent:'center',
            alignItems:'center'
        }
    
    })
    
    export default Vedio