代碼如下：var Video=require('react-native-video').default;_onProgress(data){? ?if(!this.state.videoLoaded){ ? ? ? ?this.setState({ ? ? ? ? ? ?videoLoaded:true ? ? ? ?}) ? ?} ? ?console.log(data)? ?console.log('progress')}render(){return(<View style={styles.container}><Video ref='videoPlayer' source={{uri:'http://video.iblack7.com/video_hcwijdwneqantgb4yqgx.mp4'}}?onProgress={this._onProgress} /></View>)}以上代碼運行的時候報錯：setState(...): Cannot update during an existing state transition (such as within `render` or another component's constructor). Render methods should be a pure function of props and state; constructor side-effects are an anti-pattern, but can be moved to `componentWillMount`具體的意思我覺得應該是reader里面執行的this._onProgress方法里有一個setState不能夠執行到。但我不知道怎么改，有哪位大神或老師幫忙看看嗎？跪謝！！