computed: {
handler() {
return new this.Cesium.ScreenSpaceEventHandler(this.viewer.scene.canvas)
}
}

//获取经纬度的方法
getPosition() {
  const \_this = this  //这里必须要转换一下 在setInputAction方法中，this的指向发生了变化
  \_this.handler.setInputAction(function (movement) {
    //获取屏幕坐标
    var position = movement.endPosition

    //屏幕坐标转换为世界坐标
    var pick = new \_this.Cesium.Cartesian2(position.x, position.y)
    var cartesian = \_this.viewer.scene.globe.pick(\_this.viewer.camera.getPickRay(pick), \_this.viewer.scene)

    //世界坐标转换为经纬度
    var ellipsoid = \_this.viewer.scene.globe.ellipsoid
    if(cartesian === undefined){

    }else{
      var cartesian3 = new \_this.Cesium.Cartesian3(cartesian.x, cartesian.y, cartesian.z)
      var cartographic = ellipsoid.cartesianToCartographic(cartesian3)
      var lat = \_this.Cesium.Math.toDegrees(cartographic.latitude)   //这是纬度
      var lng = \_this.Cesium.Math.toDegrees(cartographic.longitude)  //这是经度
      \_this.latitudeData = lat
      \_this.longitudeData = lng
    }
  }, \_this.Cesium.ScreenSpaceEventType.MOUSE\_MOVE)    //\_this.Cesium 是在main.js里配置了全局变量
}