Question

我正在使用LayerSwitcher向OpenLayers地图添加几个KML图层（88）。我已将所有图层添加到SelectFeature控件中。但是，一旦我使用OpenLayers.Map.addLayers向地图添加超过77个图层，SelectFeature的onSelect函数就永远不会被调用。

它似乎与KML图层无关，因为我可以从addLayers调用中移除任何11，其余图层将正常工作。注意：我不必从SelectFeature构造函数中删除任何内容。

proprietaryMap.addLayers(
[
  BaseLayer,
  SectionLayer, DistrictLayer, BoroughLayer,
  Business, Hotel, Market, Restaurant,
  Library, Museum, Theater,
  PostSecondary, PrivateEarly, PrivateElementry, PrivateHigh, PrivateJunior, PrivateK8, PrivateK12, 
  PublicElementry, PublicHigh, PublicJunior, PublicK8, PublicK12, PublicBuilding, PublicSecondary,
  Consulate, Court, Embassy, GOffice, Military, PostOffice,
  Hospital, Inpatient, Outpatient,
  Corrections, Battalion, Division, Engine, Special, 
  CCB, Checkpoint, Precinct, NOther,
  Amusement, Beach, Botanical, Garden, Golf, Park, Playground, RecCenter, Sports, Zoo,
  Church, Convent, Mosque, Synagogue, Temple,
  Constituent, Gated, PrivateDev, PublicHousing,
  Adult, Homeless, Nursing,
  Airport, Bridge, Bus, Ferry, Heliport, Marina, Mile, Intersection,
  Subway, Pier, Rail, Toll, Transit, Tunnel, WaterNav,
  Island, Lake, River,
  Center, Cemetery, Landmark, POI, Other
]);

var selectControl = new OpenLayers.Control.SelectFeature(
[ 
  Business,
  Hotel, Market, Restaurant,
  Library, Museum, Theater,
  PostSecondary, PrivateEarly, PrivateElementry, PrivateHigh, PrivateJunior, PrivateK8, PrivateK12, 
  PublicElementry, PublicHigh, PublicJunior, PublicK8, PublicK12, PublicBuilding, PublicSecondary,
  Consulate, Court, Embassy, GOffice, Military, PostOffice,
  Hospital, Inpatient, Outpatient,
  Corrections, Battalion, Division, Engine, Special, 
  CCB, Checkpoint, Precinct, NOther,
  Amusement, Beach, Botanical, Garden, Golf, Park, Playground, RecCenter, Sports, Zoo,
  Church, Convent, Mosque, Synagogue, Temple,
  Constituent, Gated, PrivateDev, PublicHousing,
  Adult, Homeless, Nursing,
  Airport, Bridge, Bus, Ferry, Heliport, Marina, Mile, Intersection,
  NYPDSubway, Pier, Rail, Toll, Transit, Tunnel, WaterNav,
  Island, Lake, River,
  Center, Cemetery, Landmark, POI, Other
],
{ onSelect: onFeatureSelect, onUnselect: onFeatureUnselect });

proprietaryMap.addControl(selectControl);
selectControl.activate();

Answer 1

如果您发布了代码的最小化版本，那么帮助您会更容易。首先阅读如何minimize your code，然后你可以使用jsfiddle.net来举办一个小型演示。

Answer 2

@ alexdube77感谢您的帮助。你让我指出了正确的方向。

在创建最小化版本时，我发现了问题。我必须移动我从上面的图层之后到上面的图层之前添加我的标记，折线和标签图层的位置。这导致这些图层被绘制在上面的图层下方，并使KML图层可以点击。我还必须添加以下代码并在添加所有图层后调用它以使标记可单击：

function checkMarkerZIndex() {
  var olDivs = document.querySelectorAll('.olLayerDiv');
  for (var i = 0; i < olDivs.length; i++) {
  if (olDivs[i].id.indexOf('OpenLayers_Layer_Markers') > -1)
    olDivs[i].style.zIndex = '2000';
  }
}

OpenLayers在几个图层上选择特征

2 个答案: