Very simple way to implement iOS push notifications in NativeScript using an exports function instead of a large, separate, observable class setup which is all I could find any where online.

push-notifications-export-function-nativescript.js

var page;
var observable = require("data/observable");
var pageData = new observable.Observable();

exports.loaded = function(args) {
    page = args.object;
  
    var pushPlugin = require("nativescript-push-notifications");
    var self = pageData;
    var iosSettings = {
        badge: true,
        sound: true,
        alert: true,
        interactiveSettings: {
            actions: [{
                identifier: 'READ_IDENTIFIER',
                title: 'Read',
                activationMode: "foreground",
                destructive: false,
                authenticationRequired: true
            }, {
                identifier: 'CANCEL_IDENTIFIER',
                title: 'Cancel',
                activationMode: "foreground",
                destructive: true,
                authenticationRequired: true
            }],
            categories: [{
                identifier: 'READ_CATEGORY',
                actionsForDefaultContext: ['READ_IDENTIFIER', 'CANCEL_IDENTIFIER'],
                actionsForMinimalContext: ['READ_IDENTIFIER', 'CANCEL_IDENTIFIER']
            }]
        },
        notificationCallbackIOS: function (data) {
            self.set("message", "" + JSON.stringify(data));
        }
    };

    pushPlugin.register(iosSettings, function (data) {
        self.set("message", "" + JSON.stringify(data));

        // Register the interactive settings
        if(iosSettings.interactiveSettings) {
            pushPlugin.registerUserNotificationSettings(function(success) {
                console.dump(success);
                alert('Successfully registered for interactive push.');
            }, function(err) {
                alert('Error registering for interactive push: ' + JSON.stringify(err));
            });
        }
    }, function() { });
  
    page.bindingContext = pageData;
}