问题描述
限时送ChatGPT账号..我一直在为一个实验项目尝试 AngularJS,但我遇到了这个问题.在我的 html 中,我想显示一个项目列表
Index.html
一些列表
<div ng-controller="datlist"><div ng-repeat="项目中的项目"><div>物品描述:{{item.description}}</div><div>项目名称:{{item.name}}</div>
起初我使用一个简单的控制器来获取信息并使用这个来更新视图:
controllers.js(原版)
function datlist($scope,$http){$http({method: 'GET', url: 'http://localhost:61686/getdatlist?format=json', headers: {'Access-Control-Allow-Origin': 'localhost:*'}}).成功(功能(数据,状态,标题,配置){$scope.items=data.itemsToReturn;控制台日志(数据);}).错误(功能(数据,状态,标题,配置){console.log("失败");});}
这运行得很好,我可以得到项目列表.同时,通过更改我的结构以使用工厂来发出相同的请求并将其绑定到 $scope.items 它不起作用.我尝试了很多 $watch 的变体,但我无法让它更新 $scope.items.我发现了一些关于 $apply 的东西,但我真的不明白如何使用它.
controllers.js(新的)
var datModule = angular.module('datModule',[]);datModule.controller('datlist', function ($scope, datfactory){$scope.items = datfactory.getlist();$scope.$watch($scope.items, $scope.items = datfactory.getlist());});datModule.factory('datfactory', 函数 ($http){var 工厂 = {};factory.getlist = function(){$http({method: 'GET', url: 'http://localhost:61686/getdatlist?format=json', headers: {'Access-Control-Allow-Origin': 'localhost:*'}}).成功(功能(数据,状态,标题,配置){console.log(data.itemsToReturn);//我得到了正确的项目,这里一切正常返回 data.itemsToReturn;}).错误(功能(数据,状态,标题,配置){console.log("失败");});}返厂;});
对此的任何想法都会很棒.PS:我发现很多帖子都在讨论这个问题,但没有一个能帮我找到完整的解决方案.
谢谢
解决方案使用手表有点难看.
试试这个:
datModule.factory('datfactory', function ($http, $q){this.getlist = function(){return $http.get('http://localhost:61686/getdatlist?format=json',{'Access-Control-Allow-Origin': 'localhost:*'}).then(功能(响应){控制台日志(响应);//我得到了正确的项目,这里一切正常返回 response.data.itemsToReturn;});}返回这个;});datModule.controller('datlist', function ($scope, datfactory){数据工厂.getlist().then(function(arrItems){$scope.items = arrItems;});});
这就是你如何使用 Promise 来处理异步事务.
更新 (15.01.2015):现在更时尚!
I have been trying AngularJS for a experimental project and I came along with this problem. In my html I want to display a list of items
Index.html
<h1>Some list</h1>
<div ng-controller="datlist">
<div ng-repeat="item in items">
<div>Item description: {{item.description}}</div>
<div>Item name: {{item.name}}</div>
</div>
</div>
At first I was using a simple controller to get the information and update the view just using this:
controllers.js (original)
function datlist($scope,$http){
$http({method: 'GET', url: 'http://localhost:61686/getdatlist?format=json', headers: {'Access-Control-Allow-Origin': 'localhost:*'}}).
success(function(data, status, headers, config) {
$scope.items=data.itemsToReturn;
console.log(data);
}).
error(function(data, status, headers, config) {
console.log("fail");
});
}
This was working pretty well and I could get the list of items. Whilst, by changing my structure to use a factory to make the same request and bind it to $scope.items it doesn't work. I tried a lot of variations of $watch but I couldn't get it to update $scope.items. I found something about $apply but I really can't understand how to use it.
controllers.js (new one)
var datModule = angular.module('datModule',[]);
datModule.controller('datlist', function ($scope, datfactory){
$scope.items = datfactory.getlist();
$scope.$watch($scope.items, $scope.items = datfactory.getlist());
});
datModule.factory('datfactory', function ($http){
var factory = {};
factory.getlist = function(){
$http({method: 'GET', url: 'http://localhost:61686/getdatlist?format=json', headers: {'Access-Control-Allow-Origin': 'localhost:*'}}).
success(function(data, status, headers, config) {
console.log(data.itemsToReturn); //I get the correct items, all seems ok here
return data.itemsToReturn;
}).
error(function(data, status, headers, config) {
console.log("fail");
});
}
return factory;
});
Any ideas about this will be great. PS: I found a lot of posts talking about this issue but none of them helped me to get a full solution.
Thanks
解决方案Using a watch for that is kinda ugly.
try this:
datModule.factory('datfactory', function ($http, $q){
this.getlist = function(){
return $http.get('http://localhost:61686/getdatlist?format=json',{'Access-Control-Allow-Origin': 'localhost:*'})
.then(function(response) {
console.log(response); //I get the correct items, all seems ok here
return response.data.itemsToReturn;
});
}
return this;
});
datModule.controller('datlist', function ($scope, datfactory){
datfactory.getlist()
.then(function(arrItems){
$scope.items = arrItems;
});
});
This is how you use promises for async matter.
UPDATE (15.01.2015): Now even sleeker!
这篇关于AngularJs $scope 在对工厂发出 GET 请求后不会更新的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
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