Openlayers-Popover
我有以下问题,将不胜感激。单击某个功能后,如何访问回调函数“function(e)”外部的“featuresArray”中的“img_src”对象?我需要将其传递到另一个javascript文件进行渲染!这是感谢信,非常感谢Openlayers-Popover,openlayers,popover,markers,Openlayers,Popover,Markers,我有以下问题,将不胜感激。单击某个功能后,如何访问回调函数“function(e)”外部的“featuresArray”中的“img_src”对象?我需要将其传递到另一个javascript文件进行渲染!这是感谢信,非常感谢 <!DOCTYPE html> <html> <head> <link rel="stylesheet" href="https://openlayers.org/en/v4.6.4/css
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="https://openlayers.org/en/v4.6.4/css/ol.css" type="text/css">
<script src="https://openlayers.org/en/v4.6.4/build/ol.js" type="text/javascript"></script>
<!--JQuery-->
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js" type="text/javascript"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css")>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js")></script>
<div id="map"></div>
<div id="element"></div>
</head>
<body>
<script>
var openStreetMap = new ol.layer.Tile({
source:new ol.source.OSM(),
visible:true,
name:"openstreetmap"
})
var map = new ol.Map({
layers:[openStreetMap],
target:"map",
view: new ol.View({
center: ol.proj.fromLonLat([80,36]),
zoom:4
})
})
var featuresArray = [];
var feature1 = new ol.Feature
({
geometry:new ol.geom.Point(ol.proj.transform([81,36],'EPSG:4326', 'EPSG:3857') ),
name:"Feature1",
img_src:"images/img_1.jpg",
});
var feature2 = new ol.Feature
({
geometry:new ol.geom.Point(ol.proj.transform([85,39],'EPSG:4326', 'EPSG:3857') ),
name:"Feature2",
img_src:"images/img_2.jpg",
});
featuresArray.push(feature1);
featuresArray.push(feature2);
//style and icon
var style = new ol.style.Style
({
image:new ol.style.Icon
({
anchor:[0.5, 5],
src:'https://openlayers.org/en/v4.6.5/examples/data/icon.png',
anchorXUnits: 'fraction',
anchorYUnits: 'pixels',
opacity: 0.75,
scale:1
})
});
var pointSource = new ol.source.Vector
({
features:featuresArray
});
var pointMarker = new ol.layer.Vector
({
source:pointSource,
style:style
});
map.addLayer(pointMarker)
var popup = new ol.Overlay({
element:element,
positioning:'bottom-center',
stopEvent:false
});
map.addOverlay(popup);
// Actions to be taken when clicked on the point
map.on("click",function(e){
var feature = map.forEachFeatureAtPixel(e.pixel,function(feature, layer){
return feature;
});
if(feature){
popup.setPosition(e.coordinate);
$(element).attr('data-placement', 'top');
$(element).attr('data-html', true);
$(element).attr('data-original-title', 'This is title');
$(element).attr('data-content', feature.get('name'));
$(element).popover('show');
}
else{
$(element).popover('destroy');
}
});
*****// I need to access this img_source here, sth like var x = feature.get('img_source')** and pass this variable x to another javascript file!***
</script>
</body>
</html>
var openStreetMap=新建ol.layer.Tile({
source:new ol.source.OSM(),
可见:对,
名称:“openstreetmap”
})
var map=新ol.map({
图层:[openStreetMap],
目标:“地图”,
视图:新ol.view({
中心:Lonlat的其他项目([80,36]),
缩放:4
})
})
var featuresArray=[];
变量特性1=新的ol.特性
({
几何:新的ol.geom.Point(ol.proj.transform([81,36],'EPSG:4326','EPSG:3857')),
名称:“功能1”,
img_src:“images/img_1.jpg”,
});
变量特性2=新的ol.特性
({
几何:新的ol.geom.Point(ol.proj.transform([85,39],'EPSG:4326','EPSG:3857')),
名称:“功能2”,
img_src:“images/img_2.jpg”,
});
功能ray.push(功能1);
功能ray.push(功能2);
//样式和图标
var style=新的ol.style.style
({
图片:新ol.style.Icon
({
锚定:[0.5,5],
src:'https://openlayers.org/en/v4.6.5/examples/data/icon.png',
主播:“分数”,
anchorYUnits:'像素',
不透明度:0.75,
比例:1
})
});
var pointSource=新的ol.source.Vector
({
特色:特色Sarray
});
var pointMarker=新ol.layer.Vector
({
来源:pointSource,
风格:风格
});
map.addLayer(点标记)
var popup=新ol.Overlay({
元素:元素,
定位:'底部-中心',
stopEvent:false
});
map.addOverlay(弹出窗口);
//单击该点时要采取的操作
地图上(“点击”,功能(e){
var feature=map.forEachFeatureAtPixel(例如,像素,函数(特征,层){
返回特性;
});
如果(功能){
弹出。设置位置(e坐标);
$(element.attr('data-placement','top');
$(element.attr('data-html',true);
$(element).attr('data-original-title','This is title');
$(element.attr('data-content',feature.get('name'));
$(元素).popover('show');
}
否则{
$(元素).popover('destroy');
}
});
*****//我需要在这里访问这个img_源,比如var x=feature.get('img_源')**并将这个变量x传递给另一个javascript文件!***
实际上,您可以在map click事件之外声明一个变量,然后在click事件发生后分配其值
var img_src = '';
// Actions to be taken when clicked on the point
map.on("click", function(e) {
var feature = map.forEachFeatureAtPixel(e.pixel, function(feature, layer) {
return feature;
});
if (feature) {
popup.setPosition(e.coordinate);
$(element).attr('data-placement', 'top');
$(element).attr('data-html', true);
$(element).attr('data-original-title', 'This is title');
$(element).attr('data-content', feature.get('name'));
$(element).popover('show');
img_src = feature.get('img_src')
console.log(img_src) //you access this variable outside the function containingimg_src
} else {
$(element).popover('destroy');
}
});
请添加更多详细信息。从你对我的回答(删除)的评论中,我显然没有给你预期的答案。那么,你想要实现什么?这是js fiddle var feature1=new ol.Feature({geometry:new ol.geom.Point(ol.proj.transform([81,36],'EPSG:4326','EPSG:3857')),名称:“feature1”,img_src:“images/img_1.jpg”,});假设我需要访问img_src:“images/img_1.jpg”,在我单击一个功能之后,我如何在功能之外访问它?我需要将它传递到另一个javascript文件@Zevs:现在还不清楚,你到底想在代码中做什么?@bhumisah在回调函数中(e)我可以调用method feature.get('img_src')来获取密钥,但我需要将该密钥传递给另一个javascript文件。如果我在功能之外执行此操作,则无法访问它。如何访问此img_src?