从过滤器返回令牌字符串到控制器的角度

Question

我想从过滤器令牌字符串返回给我的控制器

app. factory('PushNotification', function($rootScope,$q) { 
    var Service = {}; 
    Service.getTokenKey = getTokenKey; 
    const messaging = firebase.messaging(); 
    function getTokenKey(){ 
    messaging.requestPermission() 
    .then(function() { 
    console.log('Notification permission granted.'); 
    return messaging.getToken(); 

    }).then(function (token) { 

    console.log('NOTIFICATION TOKEN ', token); 
    $rootScope.token = token; 
    }) 
    .catch(function(err) { 
    console.log('Unable to get permission to notify.', err); 
    }); 
    return Service;}) 

控制器代码：

Notificationservice.getTokenKey().then(function(response){ 
    $scope.token = response)} 

定义

遇到错误说。这时，也响应是未定义的。最后加入到$ rootScope中，现在我该如何将该令牌值返回给我的控制器？

Answer 1

Try this: 

    app. factory('PushNotification', function($rootScope,$q) { 
    var Service = {}; 
    Service.getTokenKey = getTokenKey; 

    const messaging = firebase.messaging(); 
    function getTokenKey(){ 
    messaging.requestPermission() 
    .then(function() { 
    console.log('Notification permission granted.'); 
    messaging.getToken().then(function (token) { 

    console.log('NOTIFICATION TOKEN ', token); 
    // $rootScope.token = token; 
    return token; // try this 
    }) 
    .catch(function(err) { 
    console.log('Unable to get permission to notify.', err); 
    }); 
    return Service;}) 


if this is not working, please provide clear description or plunker, so that we can work it out.