我正在从OpenLayers 3.15.0更新到6.3.1。当我调用map.addLayer时,我得到以下错误。
Uncaught TypeError: Cannot read property 'ol_uid' of undefined @
ecb://web/java/ol.js:1:23754
这里是调用该函数的上下文。
function getMinZoom() {
var width = map.clientWidth;
return Math.ceil(Math.LOG2E * Math.log(width / 256));
}
//create wms layer
function addWMSLayer(url, attTxt, attHref, layer, format, server, res1, res2, res3, res4) {
initializeMap();
//tile source for load wms layers
var newRes1 = Number(getCalcResolutionSrv(res1));
var newRes2 = Number(getCalcResolutionSrv(res2));
var newRes3 = Number(getCalcResolutionSrv(res3));
var newRes4 = Number(getCalcResolutionSrv(res4));
var newWMSSource = new ol.source.TileWMS({
url: url,
params: {
'LAYERS': layer,
'FORMAT': format,
},
serverType: 'mapserver',
projection: projection
});
var minZoom = getMinZoom();
var newWmsLayer = new ol.layer.Tile({
extent: extent,
source: newWMSSource,
minResolution: newRes4,
maxResolution: newRes1,
zIndex: 0,
minZoom: minZoom
});
wmsResolution.push(Number(newRes1 - 0.00100));
wmsResolution.push(newRes2);
wmsResolution.push(newRes3);
wmsResolution.push(Number(newRes4 + 0.00100));
map.addLayer(newWmsLayer);
ECBJS.addNewWMSLayer(url, layer, newRes1, newRes2, newRes3, newRes4);
};
这个函数与3.15.0中调用addLayer的函数完全相同,除了zIndex和minZoom这两个属性。在3.15.0中,它是正常的。
问题可能出在哪里?
更新
我基于CefSharp的MinimalExample创建了一个MinimalExample解决方案。你需要Visual Studio或Rider来打开它。https:/github.comtbremeyerCefSharp.MinimalExample.git。
目前,在MainWindows.xaml.cs的函数CallWebSite中调用EvaluateScriptAsync时,返回的是
Message = "Uncaught TypeError: Cannot read property 'ol_uid' of
undefined @ ecb://web/java/ol.js:1:23754"
Success = false
我希望它能带着
Message = ""
Success = true
地图对象没有被正确初始化。下面是创建地图的代码。
var map = new ol.Map({
controls: ol.control.defaults().extend([
new ol.control.ScaleLine({
units: 'metric'
})
]).extend([mousePositionControl]),
layers: [filterVector],
overlays: [overlay],
logo: false,
target: 'map',
view: new ol.View({
})
});
它使用了mousePositionControl的扩展。mousePositionControl被定义为。
var mousePositionControl = new ol.control.MousePosition(
{
coordinateFormat: ol.coordinate.createStringXY(1),
projection: 'EPSG:2056',
className: 'custom-mouse-position',
target: document.getElementById('info'),
undefinedHTML: ' '
});
所以它使用了一个投影 投影没有得到正确的初始化。
var extent = [2420000, 130000, 2900000, 1350000];
var jsLayers = new Object();
if (proj4) {
proj4.defs("EPSG:2056", "+proj=somerc +lat_0=46.95240555555556 +lon_0=7.439583333333333 +k_0=1 +x_0=2600000 +y_0=1200000 +ellps=bessel +towgs84=674.374,15.056,405.346,0,0,0,0 +units=m +no_defs");
};
var projection = ol.proj.get('EPSG:2056');
projection.setExtent(extent);
从 OpenLayers.Map在使用非 "标准 "的EPSG代码时无法渲染。使用非 "标准 "的EPSG代码时,地图无法呈现。 我知道了,我可以用
ol.proj.proj4.register(proj4);
来帮助投影。现在的内容是:
var extent = [2420000, 130000, 2900000, 1350000];
var jsLayers = new Object();
if (proj4) {
proj4.defs("EPSG:2056", "+proj=somerc +lat_0=46.95240555555556 +lon_0=7.439583333333333 +k_0=1 +x_0=2600000 +y_0=1200000 +ellps=bessel +towgs84=674.374,15.056,405.346,0,0,0,0 +units=m +no_defs");
};
ol.proj.proj4.register(proj4);
var projection = ol.proj.get('EPSG:2056');
projection.setExtent(extent);
修改后,filterVector不见了 覆盖的定义必须移到地图初始化之前。
var filterSource = new ol.source.Vector({ wrapX: false });
var filterVector = new ol.layer.Vector({
source: filterSource,
style: new ol.style.Style({
fill: new ol.style.Fill({
color: 'rgba(255, 255, 255, 0.5)'
}),
stroke: new ol.style.Stroke({
color: '#ffcc33',
width: 2
}),
image: new ol.style.Circle({
radius: 7,
fill: new ol.style.Fill({
color: '#ffcc33'
})
})
})
});
var container = document.getElementById('popup');
var content = document.getElementById('popup-content');
var closer = document.getElementById('popup-closer');
var overlay = new ol.Overlay(({
element: container,
autoPan: true,
autoPanAnimation: {
duration: 250
}
}));
我更新了 https:/github.comtbremeyerCefSharp.MinimalExample。 以反映这些变化。