React Native BLE Manager将不会在指定时间内停止扫描

Question

反应性：0.61 使用的库：react-native-ble-manager 问题：我已经使用react-native-ble-manager实现了蓝牙扫描仪.startScan将在渲染上被调用。扫描的时间为2秒。但是扫描不会在2秒后停止。它会在8-9秒后停止，并且如果正在进行扫描，屏幕将被挂起。

代码段：

 class BluetoothScreen extends React.Component {
   constructor(props) {
        super(props);       
        this.state = {
                   scanning: false,
         }
       this.startScan()      
       this.handleDiscoverPeripheral = this.handleDiscoverPeripheral.bind(this);
       this.handlerStop = bleManagerEmitter.addListener('BleManagerStopScan', this.handleStopScan );                
       this.handleAppStateChange = this.handleAppStateChange.bind(this);      
  }
 startScan() {
        console.log("from start scan")
        this.setState({ scanning: false })
        if (!this.state.scanning) {
             BleManager.scan([], 2, false).then((results) => {
                console.log('Scanning...');
                this.setState({ scanning: true });
                this.setState({ isVisibleOne: true })
                return (
                    <View>
                        <Text>Scanning..</Text>
                    </View>
                      )    
               })

    }
     handleStopScan() {
         console.log('Scan is stopped');       
         if (this.state.isVisibleOne === false)
         this.setState({ scanning: false })
     }

}