问ReferenceError:找不到变量: dis

EN

export default class Mapview extends React.Component {
    constructor(props) {
        super(props);

        this.state = {
              latitude: 0,
              longitude: 0,
              error: null,
              coords: [],
              places: null,
              selectedLat: "",
              selectedLang: "",
              distance: "",
              mesafeFarki: 1,
        };
    }
    
    showCoords() {
        const arrayMarkers = [];
        var coordsLatLang = [];
        var allCoords = [];
        var selectedCoordLat = [];
        var selectedCoordLang = [];
        var dis = [];
    
        Geolocation.getCurrentPosition(position => {
          var userLat = position.coords.latitude
          var userLang = position.coords.longitude
    
          for (let index = 0; index < this.props.locCoord.length; index++) {
            coordsLatLang = this.props.locCoord[index].split(',')
            allCoords.push(this.props.locCoord[index].split(','))
            selectedCoordLat.push(allCoords[index][0])
            selectedCoordLang.push(allCoords[index][1])

            dis.push(getDistance(
              { latitude: userLat, longitude: userLang },
              { latitude: selectedCoordLat[index], longitude: selectedCoordLang[index] }
            ))
        .
        .
        .
        .
        
        .
          hedefiKontrol(){
            this.setState({ 
              
            mesafeFarki : ((dis[index] / 1000).toFixed(2)),// RefereanceError:Can't find variabal:dis 
            
                });
                if (mesafeFarki < 0.2) {
                      this.props.navigation.navigate("SSS");
                  }
          }
}