这是我的服务:
app.service('trackService', ['$http', function($http) {
var data;
this.topTracks = function(limit) {
$http({
method: 'GET',
url: 'http://ws.audioscrobbler.com/2.0/?method=chart.gettoptracks',
params: {api_key: 'e8452c5962aafbb3e87c66e4aaaf5cbf', format: 'json', limit: limit}
}).success(function(result) {
this.data = result.tracks; console.log(this.data); return this.data;
});
}
}]);
和控制器 -
app.controller('artistSongsCtrl', ['$scope', 'trackService', function($scope, trackService) {
$scope.data = trackService.topTracks(10);
//console.log($scope.data);
}]);
如何使用自定义服务中的$ http服务将数据发送到控制器?
答案 0 :(得分:3)
$http
有几个问题是异步的,您的服务方法topTracks()
不会返回任何内容。此外,您无法返回success
内,无处可返回...使用then()
代替
您需要从服务返回承诺,并在控制器
中的承诺回调中设置范围app.service('trackService', ['$http',
function($http) {
var data;
var self = this;
this.topTracks = function(limit) {
return $http({
method: 'GET',
url: 'http://ws.audioscrobbler.com/2.0/?method=chart.gettoptracks',
params: {
api_key: 'e8452c5962aafbb3e87c66e4aaaf5cbf',
format: 'json',
limit: limit
}
}).then(function(result) {
self.data = result.data.tracks;
console.log(self.data);
return self.data;
});
}
}
]);
app.controller('artistSongsCtrl', ['$scope', 'trackService',
function($scope, trackService) {
trackService.topTracks(10).then(function(data) {
$scope.data = data;
//console.log($scope.data);
});
}
]);
答案 1 :(得分:2)
在您的服务中,您正在进行异步GET请求。为了让控制器捕获该响应,您需要返回一个promise。以下是使用$ q的示例:
app.service('trackService', ['$http', '$q', function($http, $q) {
var data;
this.topTracks = function(limit) {
var d = $q.defer();
$http({
method: 'GET',
url: 'http://ws.audioscrobbler.com/2.0/?method=chart.gettoptracks',
params: {api_key: 'e8452c5962aafbb3e87c66e4aaaf5cbf', format: 'json', limit: limit}
}).success(function(result) {
this.data = result.tracks;
console.log(this.data);
d.resolve(this.data);
});
return d.promise;
}
}]);