Javascript 推送通过单独AJAX查询获得的坐标后，无法在地图上添加多段线？

从SQL数据库执行XMLHttpRequest后，另一个函数调用位于map初始化函数内的setPolyline函数，因为map和lines变量只是局部变量，而不是全局变量，作为latlng数组的参数传递

setPolyline函数获取该数组，清除多段线的命名线路径，将latlng数组推入该路径，当到达setmap指令时，根本无法执行任何操作

是否存在嵌套问题或其他问题？…请帮助我在过去6个小时内一直在尝试解决此问题…

您是否在任何地方调用lines.setPathpath？

尝试以下操作：

  function initialize() {

    var myOptions = {
    center: new google.maps.LatLng(45.652988, 25.611792),
    zoom: 12,
    mapTypeId: google.maps.MapTypeId.SATELLITE
    };

    var map = new google.maps.Map(document.getElementById("map_canvas"),myOptions);

    var lines = new google.maps.Polyline({
                strokeColor: '#FF0000',
                strokeOpacity: 0.5,
                strokeWeight: 2,
                editable: true
                });

    nline = function setPolyline(points) {
    var path = lines.getPath();
    path.clear();
    path.push(points);
    lines.setMap(map);
    }

    google.maps.event.addListener(map, 'click', function() {
    var target = document.getElementById("info_panel");
    target.style.display = "none";
    });

    /*
    google.maps.event.addListener(line, 'click', function() {
    alert("you clicked polyline");
    });
    */
  }

 function initialize() {

    var myOptions = {
    center: new google.maps.LatLng(45.652988, 25.611792),
    zoom: 12,
    mapTypeId: google.maps.MapTypeId.SATELLITE
    };

    var map = new google.maps.Map(document.getElementById("map_canvas"),myOptions);

    var lines = new google.maps.Polyline({
                strokeColor: '#FF0000',
                path: linepth,
                strokeOpacity: 0.5,
                strokeWeight: 2,
                editable: true
                });

    nline = function setPolyline(points) {
    var linepth= [];
    var path = lines.getPath();
    path.clear();
//    path.push(points);
    linepth.push(points);
    lines.setMap(map);
    }

    google.maps.event.addListener(map, 'click', function() {
    var target = document.getElementById("info_panel");
    target.style.display = "none";
    });

    /*
    google.maps.event.addListener(line, 'click', function() {
    alert("you clicked polyline");
    });
    */
  }