从Google map api javascript中的地图（使用图形管理器）获取所有多段线

如何获取使用图形管理器创建的所有多段线？ 我无法使用DrawingManager事件监听器，因为插入的多段线是可编辑的（DrawingManager中的事件监听器只能在第一次插入后工作）。
并且可以绘制多条多段线

var polylines = []; // array in the global scope

这是我的密码

function initMap(){

        //set center coordinate
        var myLat= /*value*/;
        var myLng= /*value*/;
        var center= {lat:myLat, lng:myLng};

        //create map
        var map = new google.maps.Map(document.getElementById('map'), {
            zoom: 16,
            center: center
        });

        addDrawingControl(map);
    }

  function addDrawingControl(map){
        //add drawing control
        var drawingControl = new google.maps.drawing.DrawingManager(
        {
            drawingMode : null,
            drawingControl : true,
            drawingControlOptions :{
                position : google.maps.ControlPosition.TOP_CENTER,
                drawingModes : [
                google.maps.drawing.OverlayType.POLYLINE
                ]
            },
            polylineOptions : {
                editable:true,
                draggable:false,
                geodesic:true
            }
        });
        drawingControl.setMap(map);
        //end of add drawing control

        //add event listener
        google.maps.event.addListener(drawingControl, 'polylinecomplete', function(polyline){
                var polylinePath = polyline.getPath();
                console.log("polyline : "+polylinePath.getArray());                 
        });
    }

---

保留对多段线的引用

var polylines = []; // array in the global scope

在

polylinecomplete

事件中，将对多段线的引用添加到数组中

//add event listener
google.maps.event.addListener(drawingControl, 'polylinecomplete', function(polyline) {
  polylines.push(polyline);
});

如果要捕获数据，请遍历数组，检索多段线的当前状态

google.maps.event.addDomListener(document.getElementById('btn'), 'click', function() {
  var htmlStr = "";
  for (var i = 0; i < polylines.length; i++) {
    htmlStr += "polyline #" + i + " # vertices=" + polylines[i].getPath().getLength() + " length=" + google.maps.geometry.spherical.computeLength(polylines[i].getPath()).toFixed(2) + " km<br>";
    for (var j = 0; j < +polylines[i].getPath().getLength(); j++) {
      htmlStr += "&nbsp;&nbsp;" + polylines[i].getPath().getAt(j).toUrlValue(6) + "<br>";
    }
  }
  document.getElementById('output').innerHTML = htmlStr;
});

---

保留对多段线的引用

var polylines = []; // array in the global scope

在

polylinecomplete

事件中，将对多段线的引用添加到数组中

//add event listener
google.maps.event.addListener(drawingControl, 'polylinecomplete', function(polyline) {
  polylines.push(polyline);
});

如果要捕获数据，请遍历数组，检索多段线的当前状态

google.maps.event.addDomListener(document.getElementById('btn'), 'click', function() {
  var htmlStr = "";
  for (var i = 0; i < polylines.length; i++) {
    htmlStr += "polyline #" + i + " # vertices=" + polylines[i].getPath().getLength() + " length=" + google.maps.geometry.spherical.computeLength(polylines[i].getPath()).toFixed(2) + " km<br>";
    for (var j = 0; j < +polylines[i].getPath().getLength(); j++) {
      htmlStr += "&nbsp;&nbsp;" + polylines[i].getPath().getAt(j).toUrlValue(6) + "<br>";
    }
  }
  document.getElementById('output').innerHTML = htmlStr;
});