努力在ngRepeat
内展示动态内容。当需要显示我的承诺内容时,我得到一个空对象{}
:
<div ng-controller="DemoCtrl">
<div class="sidebar" ng-repeat="row in rows">
<div class="row">
<input type="checkbox">
<div class="name">{{row.name}}</div>
<div class="title">{{map[$index]}}</div>
</div>
</div>
</div>
和控制器:
function DemoCtrl($scope, $http, $q) {
const rows = function() {
const rows = [];
for (let i = 0; i < 12; i++) {
rows.push({
id: `demo-${i}`,
name: `Demo ${i}`
});
}
return rows;
};
$scope.rows = rows();
$scope.map = [];
// $scope.$watch($scope.map, function (oldValue, newValue) {
// console.log(oldValue, newValue);
// });
function _data() {
// const promises = [];
for (let i = 0; i < $scope.rows.length; i++) {
var defer = $q.defer();
$http.get(`https://jsonplaceholder.typicode.com/posts/${i + 1}`).then(function(post) {
defer.resolve(`${post.data.title.substring(0, 10)}...`);
});
$scope.map.push(defer.promise);
// promises.push(defer.promise);
}
// return $q.all(promises);
return $q.all($scope.map);
}
function _init() {
_data().then(function(data) {
$scope.map = data; // why aren't we getting here?
});
};
_init();
}
此处的Plunker:https://plnkr.co/edit/2BMfIU97Moisir7BBPNc
我已经修改了一些其他想法,例如在值更改后尝试在$watch
对象上添加$scope
,但我不相信这会有任何帮助。我有一些挥之不去的问题:
ngRepeat
内如何/为何会发生变化?$q.all
的回叫没有被调用?答案 0 :(得分:2)
在Angular中,您几乎不需要使用$ q。
您可以在每个$ http.get
之后填写一系列帖子标题function DemoCtrl($scope, $http) {
const rows = function () {
const rows = [];
for (let i = 0; i < 12; i++) {
rows.push({
id: `demo-${i}`,
name: `Demo ${i}`
});
}
return rows;
};
$scope.rows = rows();
$scope.map = [];
function _init() {
for (let i = 0; i < $scope.rows.length; i++) {
$http.get(`https://jsonplaceholder.typicode.com/posts/${i + 1}`).then(function (post) {
$scope.map.push(post.data.title);
});
}
}
_init();
}