$广播当前范围 [英] $broadcast to current scope

问题描述

要preface，我已经通过的WebSocket和节点服务器连接到一个节点服务器离子应用通过TCP套接字连接到一个C ++应用程序。我有这个服务，连接并提供了插座，而且手表一个 NACK 的响应，这样就可以发出警报通知用户出现错误：

To preface, I have an Ionic app connected to a Node server via a websocket and the Node server is connected to a C++ app via a TCP socket. I have this service that connects and serves up the socket but also watches for a nack response so that it can issue an alert notifying the user of the error:

(function(){
  'use strict';

  angular.module('tacoCorp.services')
    .factory('Socket', Socket);

  Socket.$inject = ['socketFactory', 'OSDP', '$rootScope'];

  function Socket(socketFactory, OSDP, $rootScope) {
    var socket = io('localhost:3000');

    socket = socketFactory({ioSocket: socket});

    socket.on('connect', function() {
        console.log('connected');
    });

    socket.on('nack', function(data) {
        console.log(data);
        var error = OSDP.parse(data);
        $rootScope.$broadcast('nack', error);
    });

    return socket;
  }
}());

我在每个控制器听力有这样使得它可以发出弹出：

I have this in each controller listening so that it can issue the popup:

$scope.$on('nack', function(e, err) {
        console.log(err);
        var alertPopup = $ionicPopup.alert({
            title: 'Error',
            template: err.error
        });
    });

我的问题是，它是射击，即使我只有一个每个国家/视图控制器多次。仿佛 $摧毁没有发生，或者它不删除监听器。仍然发生，如果我这样做：

My problem is that it is firing multiple times even though my there is only one controller for each state/view. Almost as if $destroy isn't happening or it's not removing the listener. Still happens if I do this:

var nackListener = $scope.$on('nack', function(e, err) {
        console.log(e);
        var alertPopup = $ionicPopup.alert({
            title: 'Error',
            template: err.error
        });
    });

    $scope.$on('$destroy', nackListener);

我不知道该怎么处理这个问题最好的办法就是

I'm not sure what the best way to handle this is.

推荐答案

拉迪姆·克勒指出 $ ionicConfigProvider.views.maxCache（0）解决这个问题，其中缓存：假的状态不对。你也可以这样做：

As Radim Köhler pointed out $ionicConfigProvider.views.maxCache(0) fixes this issue where cache:false on the state does not. You could also do this:

$scope.$on("$ionicView.afterLeave", function () {
        $ionicHistory.clearCache();
    });

我

最好的办法是随便挑一个控制器把它放在与它做。

Best way for me is to just pick one controller to put it on and be done with it.

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