我有一个页面,我需要打2个宁静的网络服务电话。第一次休息是成功的,我正在收回数据。点击第二次服务后,第一次调用的数据仍然存在于变量中。那么使用回调方法就是解决这个问题的方法呢?如果是这样,如何用angularjs方式编写回调方法?
这是我的代码。
app.directive('collection', function() {
return {
restrict: "E",
replace: true,
scope: {
collection: '=',
articleData: '=',
articleContent: '='
},
template: "<ul><member ng-repeat='member in collection' member='member' article-data='articleData' article-content='articleContent'></member></ul>"
}
});
app.directive('member', function($compile,$http,getTocService) {
return {
restrict: "A",
replace: true,
scope: {
member: '=',
articleData: '=',
articleContent: '='
},
template: "<div><li><a href='#' ng-click='getContent(member.itemId)'>{{member.title}}</a></li></div>",
link: function(scope, element, attrs) {
scope.getContent = function(itemId) {
var art = getTocService.getArtData(itemId);
}
if (angular.isArray(scope.member.tocItem)) {
if (scope.member.hasChildren == "true") {
for (var i = 0; i < scope.member.tocItem.length; i++) {
if (scope.member.tocItem.title) {
scope.member.tocItem.title.hide = true;
}
}
}
element.append("<collection collection='member.tocItem'></collection>");
$compile(element.contents())(scope)
}
}
}
});
app.controller('apdController', function($scope, getTocService,$location) {
var bookId = $location.search().id;
var sampdata = getTocService.getToc(bookId);
$scope.tasks =sampdata;
// $scope.tasks = data;
// var artData = getTocService.getArtData('PH1234');
// $scope.articleContent = artData;
});
app.service(
"getTocService",
function( $http, $q ) {
return({
getToc: getToc,
getArtData: getArtData
});
function getToc(bookIdvar) {
var request = $http({
method: "post",
url: "http://10.132.241.41:8082/apdpoc/services/ApdBookService/getTOC",
params: {
action: "post"
},
data: {
getTOCCriteria:{
bookId: bookIdvar
}
}
});
return( request.then(handleSuccess,handleError));
}
function getArtData(itemId) {
var request = $http({
method: "post",
url: "http://10.132.241.41:8082/apdpoc/services/ApdBookService/getArticle",
params: {
action: "post"
},
data: {
getArticleCriteria:{
articleId: itemId,
locale: "en_US"
}
}
});
alert(data);
return( request.then(handleSuccess,handleError));
}
function handleSuccess(response){
return (response.data);
}
function handleError( response ) {
if (
! angular.isObject(response.data) ||
! response.data.message
) {
return($q.reject("An unknown error occurred."));
}
return($q.reject(response.data.message));
}
}
);
这里,“data”是我在保存响应数据的两个调用中使用的变量。我从
调用第二服务“getArtData” var art = getTocService.getArtData(itemId);
答案 0 :(得分:1)
您应该强烈考虑使用 promises 。承诺允许链接,并且比回调地狱好多了。这里的关键字是使用然后。
这篇SO帖子更好地解释了它:Processing $http response in service
希望这对你有所帮助。
答案 1 :(得分:1)
您的getTocService
会返回承诺,您需要链接这两个承诺。
var bookId = $location.search().id;
var sampdataPromise = getTocService.getToc(bookId);
sampdataPromise.then( function(data) {
$scope.tasks = data;
//return next promise for chaining
return getTocService.getArtData(data.itemId);
}).then (function (artData) {
$scope.articleContent = artData;
}).catch (function (error) {
//log error
});