因此,我已经尝试了解服务和控制器的承诺。我宁愿在服务中解决它,以便我可以重复使用该变量而不必多次解决它。解决使用AngularJS的服务/工厂vs控制器的承诺
我遇到的问题是它的工作原理,但它非常缓慢地返回数据。所以我觉得我在这里做错了什么。我的ng选项需要大约5或6秒才能填充。哪个更好?我该如何改进我的代码,使其运行速度更快?
解决了服务:
resortModule.factory('locaService',['$http', '$rootScope', function ($http, $rootScope){
locaService.getLocations=
function() {
return $http.get('/api/destinations').then(
function(result){
locaService.locations= result.data;
return locaService.locations;
}
);
return locaService.locations;
};
resortModule.controller('queryController',['$scope', 'locaService', function($scope, locaService) {
$scope.getLocations= locaService.getLocations().then(function(result){
$scope.locations= result;
});
}]);
解决在控制器:
resortModule.factory('locaService',['$http', '$rootScope', function ($http, $rootScope){
locaService.getLocations=
function() {
locaService.locations= $http.get('/api/destinations');
//stores variable for later use
return locaService.locations;
};
}]);
resortModule.controller('queryController',['$scope', 'locaService',
function($scope, locaService) {
locaService.getLocations()
.then(
function(locations) // $http returned a successful result
{$scope.locations = locations;} //set locations to returned data
,function(err){console.log(err)});
}]);
HTML:
<select ng-click="selectCheck(); hideStyle={display:'none'}" name="destination" ng-style="validStyle" ng-change="getResorts(userLocation); redirect(userLocation)" class="g-input" id="location" ng-model="userLocation">
<option value=''>Select Location</option>
<option value='/destinations'>All</option>
<option value="{{loca.id}}" ng-repeat="loca in locations | orderBy: 'name'">{{loca.name}}</option>
</select>
[缓存承诺](http://stackoverflow.com/a/18745499/1048572)比缓存值要简单得多。 – Bergi
@Bergi感谢您的链接。 – allienx