将令牌字符串从过滤器返回到控制器角

Question

我想返回一个令牌字符串从过滤器返回到我的控制器

    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 )}

出错说。最后添加到$ rototscope，现在如何将该令牌值返回到控制器??

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.