<!doctype html>
<html ng-app="myApp">
<head>
<link rel="stylesheet" href="http://cdn.jsdelivr.net/foundation/4.3.2/css/foundation.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.8/angular.js"></script>
</head>
<body>
<h1>Open Pull Requests for Angular JS</h1>
<ul ng-controller="DashboardController">
<li ng-repeat="pr in pullRequests">
{{ pr.title }}
</li>
</ul>
</body>
</html>
angular.module(‘myApp‘, [])
.controller(‘DashboardController‘, [
‘$scope‘, ‘GithubService‘,
function($scope, GithubService) {
GithubService.getPullRequests()
.then(function(data) {
$scope.pullRequests = data;
});
}])
.factory(‘GithubService‘, [
‘$q‘, ‘$http‘,
function($q, $http) {
var getPullRequests = function() {
var deferred = $q.defer();
// Get list of open angular js pull requests from github
$http.get(‘https://api.github.com/repos/angular/angular.js/pulls‘)
.success(function(data) {
deferred.resolve(data);
})
.error(function(reason) {
deferred.reject(reason);
});
return deferred.promise;
};
return { // return factory object
getPullRequests: getPullRequests
};
}]);
then:无论promise成功还是失败了，当结果可用之后，then都会立刻异步调用successFn或者errFn。这个方法始终用一个参数来调用回调函数：结果，或者是拒绝的理由。在promise被执行或者拒绝之前，notifyFn回调可能会被调用0到多次，以提供过程状态的提示。
then()方法总是返回一个新的promise，可以通过successFn或者errFn这样的返回值执行或者被拒绝。它也能通过notifyFn提供通知。
原文：http://www.cnblogs.com/ByronWu12345/p/4854323.html