在我的登录屏幕上,当我点击"登录"按钮。它实际上是ng-submit =" login()"。代码在我的LoginCtrl控制器中。
function onSuccessfulLogin() {
$scope.failureMessage = "";
$rootScope.mainbody.position = 'absolute';
if (nextState !== null && typeof nextState.name === 'string' && nextState.name !== '') {
console.log("calling nextState ......");
$state.go(nextState.name, nextState.params);
} else {
$state.go('main', {});
}
}
$scope.login = function() {
disableLoginButton();
$rootScope.login = {
goodmsg : true,
errormsg : false
}
$scope.failureMessage = "Signing in Analytics Dashboard ....";
User.authenticate($scope.username, $scope.password, onSuccessfulLogin, onFailedLogin, $scope.persist);
};
我有一个名为User的服务,我打电话给"验证"单击上面的登录按钮后即可运行。它目前正常工作,直到我在#34; this.authenticate"内添加了更多的HTTP调用。功能。我想要发生的是将其转换为promise,以便在收到来自所有HTTP请求的所有数据时,它将在正确的时间调用onSuccessfulLogin()。但是,我不确定我将如何转换" this.authenticate"回报承诺。顺便说一下,TokenService是我制作的Restangular工厂。
此外,我想将其转换为承诺的原因是因为我想在ui-router实例化我将要显示的控制器之前确保所有数据都已准备好。
this.authenticate = function(username, password, successCallback, errorCallback, persistData) {
this.removeAuthentication();
TokenService.setResponseInterceptor(function (data, operation, what, url, response) {
if (operation == 'post') {
$rootScope.locationResourceId = response.headers('Location').split('/')[response.headers('Location').split('/').length-1]
}
return response.data;
});
TokenService.one('authentokens').customPOST({'email' : username , 'password' : password}, '', {app : 'baam'})
.then(function(data) {
var userresourceId = data.href.split('/')[data.href.split('/').length-1]
$rootScope.userData = {
isAuthenticated : true,
username : username,
bearerToken : data.token,
expirationDate : new Date(data['expires']),
resourceId : userresourceId,
tokenResourceId : $rootScope.locationResourceId
};
TokenService.one('users').customGET($rootScope.userData.resourceId, { 'token' : $rootScope.userData.bearerToken })
.then(function(jsondata) {
$rootScope.userData.locale = retrieveLocale();
// Set locale via Factory
var currentLocale = CurrentLocaleFactory;
currentLocale.locale = $rootScope.userData.locale;
$rootScope.userData.firstname = (jsondata.firstname == null) || (jsondata.firstname == null) ? '' : jsondata.firstname;
$rootScope.userData.lastname = (jsondata.lastname == null) || (jsondata.lastname == null) ? '' : jsondata.lastname;
var avatar = username.split('@')[0].toLowerCase();
$http.get('assets/json/avatar.json')
.then(function(res) {
$rootScope.userData.gravatarLink = res.data.gravatarLink;
if (persistData === true) {
saveData();
}
if (typeof successCallback === 'function') {
successCallback();
}
}, function() {
$rootScope.userData.gravatarLink = "assets/img/noface.png";
if (persistData === true) {
saveData();
}
if (typeof successCallback === 'function') {
successCallback();
}
})
})
}, function(data) {
if (typeof errorCallback === 'function') {
if (data.error_description) {
errorCallback(data.error_description);
} else {
errorCallback(data.data.message);
}
}
})
};
答案 0 :(得分:1)
从函数中返回promise:
//First return
return TokenService.one('authentokens').customPOST({
'email': username,
'password': password
}, '', {
app: 'baam'
}).then(function(data) {
/* ... */
// Second return inside the success handler
return TokenService.one('users').customGET($rootScope.userData
.resourceId, {
'token': $rootScope.userData.bearerToken
}).then(function(jsondata) {
/* ... */
})
})
然后,您的函数将返回一个将在两个异步调用都返回后解析的承诺。
如果排序不重要,您还可以使用$q.all(arrayOfPromises)
,它返回一个承诺,当数组中的所有承诺都返回时,它将被解析。