google-maps-markers - 重叠标记 Spiderfier + MarkerWithLabel

Question

将 Google Maps JavaScript API v3 与Overlapping Marker Spiderfier和MarkerWithLabel 一起使用会在蜘蛛化时产生不利影响：除了第一个标记外，所有标记都会蜘蛛化，然后立即返回其原始位置（不是通过 unspiderfy）。

也就是说，标记事件在蜘蛛化后被position_changed触发一次，其中是蜘蛛化的标记数。n - 1n

Answer 1

问题源于optimizedMarkerWithLabel 强制为 false 的 Marker 属性。保留optimized为 true（默认设置）应该会导致正确的爬虫。这样做需要对MarkerWithLabel 源进行修补：删除设置的行optimized = false：

function MarkerWithLabel(opt_options) {
  opt_options = opt_options || {};
  opt_options.labelContent = opt_options.labelContent || "";
  opt_options.labelAnchor = opt_options.labelAnchor || new google.maps.Point(0, 0);
  opt_options.labelClass = opt_options.labelClass || "markerLabels";
  opt_options.labelStyle = opt_options.labelStyle || {};
  opt_options.labelInBackground = opt_options.labelInBackground || false;
  if (typeof opt_options.labelVisible === "undefined") {
    opt_options.labelVisible = true;
  }
  if (typeof opt_options.raiseOnDrag === "undefined") {
    opt_options.raiseOnDrag = true;
  }
  if (typeof opt_options.clickable === "undefined") {
    opt_options.clickable = true;
  }
  if (typeof opt_options.draggable === "undefined") {
    opt_options.draggable = false;
  }
  // if (typeof opt_options.optimized === "undefined") {
  //   opt_options.optimized = false;
  // }
  opt_options.crossImage = opt_options.crossImage || "http" + (document.location.protocol === "https:" ? "s" : "") + "://maps.gstatic.com/intl/en_us/mapfiles/drag_cross_67_16.png";
  opt_options.handCursor = opt_options.handCursor || "http" + (document.location.protocol === "https:" ? "s" : "") + "://maps.gstatic.com/intl/en_us/mapfiles/closedhand_8_8.cur";
  // opt_options.optimized = false; // Optimized rendering is not supported

  this.label = new MarkerLabel_(this, opt_options.crossImage, opt_options.handCursor); // Bind the label to the marker

  // Call the parent constructor. It calls Marker.setValues to initialize, so all
  // the new parameters are conveniently saved and can be accessed with get/set.
  // Marker.set triggers a property changed event (called "propertyname_changed")
  // that the marker label listens for in order to react to state changes.
  google.maps.Marker.apply(this, arguments);
}