我正在写一些东西来从我的GeoServer获取所有图层名称。这是我的代码:
function getData() {
return $.ajax({
url: "http://localhost:8080/geoserver/ows?service=wms&version=1.1.0&request=GetCapabilities",
type: 'GET'
});
}
function onComplete(data) {
var parser = new ol.format.WMSCapabilities();
var result = parser.read(data.responseText);
var layersArray = result.Capability.Layer.Layer;
layersNameArray = [];
for(i=0;i<layersArray.length;i++){
layersNameArray.push(layersArray[i].Name)
}
return layersNameArray
}
getData().done(onComplete)
我远非异步调用的专家,但我认为这个应该有效。如果我将getData()
结果存入变量并逐行运行onComplete()
函数,则代码可以正常工作。但是当我使用getData().done(onComplete)
运行代码时,它始终会在var result = parser.read(data.responseText);
行Assertion error: Failure
处失败。
知道为什么这不起作用吗?
修改
此代码有效,但不返回任何内容。我希望函数输出layersNameArray
变量。我该怎么办?
function getData() {
$.ajax({
url: "http://localhost:8080/geoserver/ows?service=wms&version=1.1.0&request=GetCapabilities",
type: 'GET',
success: function(response) {
var parser = new ol.format.WMSCapabilities();
var result = parser.read(response);
var layersArray = result.Capability.Layer.Layer;
layersNameArray = [];
for(i=0;i<layersArray.length;i++){
layersNameArray.push(layersArray[i].Name)
}
return layersNameArray
}
});
}
答案 0 :(得分:2)
您可以使用Jquery回调功能
以这种方式调用你的函数,
getData(function(responsefromAjax){
alert('the response from ajax is :' +responsefromAjax);
// what ever logic that needs to run using this ajax data
});
以这种方式改变你的方法。
function getData(callback) { // passing the function as parameter
$.ajax({
url: "http://localhost:8080/geoserver/ows?service=wms&version=1.1.0&request=GetCapabilities",
type: 'GET',
success: function(response) {
var parser = new ol.format.WMSCapabilities();
var result = parser.read(response);
var layersArray = result.Capability.Layer.Layer;
layersNameArray = [];
for(i=0;i<layersArray.length;i++){
layersNameArray.push(layersArray[i].Name)
}
callback(layersNameArray); //this will execute your function defined during the function call. As you have passed the function as parameter.
}
});
}
如果有帮助,请告诉我