在执行UTFGrid控件回调函数时传入的参数infoLookup.id,infoLookup.data没值
url="http://localhost:8090/iserver/services/map-china400/rest/maps/China";
function init(){
map = new SuperMap.Map("map", {controls: [
new SuperMap.Control.ScaleLine(),
new SuperMap.Control.Zoom(),
new SuperMap.Control.LayerSwitcher(),
new SuperMap.Control.Navigation({
dragPanOptions: {
enableKinetic: true
}
})],
projection: "EPSG:3857"
});
layer = new SuperMap.Layer.TiledDynamicRESTLayer("China", url, {transparent: true}, {useCanvas: true, maxResolution: "auto"});
//注意：pixcell与utfgridResolution两个属性有对应关系，在使用的时候也要注意场景；
//1.其中pixcell为发送给服务端请求utfgrid瓦片的精度，数值越小，精度越高，相应的瓦片大小也就越大；
//2.utfgridResolution为客户端解析瓦片使用的精度，应该与pixcell的值相等，否则会产生位置与属性对应不上的问题；
//3.通常如果UTFGrid图层为面图层，对应的数据量会比较大，为了不影响页面的正常浏览，可以将这两个属性设的大一些；
//4.isUseCache设置是否使用缓存，使用缓存能够提高性能；
utfgrid = new SuperMap.Layer.UTFGrid("UTFGridLayer", url,
{
layerName: "China_Province_R@China",
utfTileSize: 256,
pixcell: 8,
isUseCache: true
},
{
utfgridResolution: 8
});
layer.events.on({"layerInitialized": addLayer});
control = new SuperMap.Control.UTFGrid({
layers: [utfgrid],
callback: callback,
handlerMode: "move"
});
map.addControl(control);
}
var callback = function (infoLookup,loc, pixel) {
closeInfoWin();
if (infoLookup) {
var info;
for (var idx in infoLookup) {
info = infoLookup[idx];
if (info && info.data) {
var dom = "<div style='font-size: 12px; color: #000000;'>" + info.data.NAME + "</div>";
//设置x与y的像素偏移量，不影响地图浏览；
var xOff = (1 / map.getScale()) * 0.001;
var yOff = -(1 / map.getScale()) * 0.005;
var pos = new SuperMap.LonLat(loc.lon+xOff, loc.lat+yOff);
infowin = new SuperMap.Popup("chicken",
pos,
new SuperMap.Size(100, 20),
dom,
false, null);
infowin.autoSize=true;
//infowin.setBackgroundColor("#FD1715");
map.addPopup(infowin);
}
}
}
};
