How To Open $ionicPopover Popup from Controller

How To Open $ionicPopover from Controller programmatically without a mouse click event:


var self = this; // store reference to 'this' controller object

this.openCustomPopover = function ($event) {

        $event = document.getElementsById('myElementID'); // html element ID 

        $ionicPopover.fromTemplateUrl('popovers/myhtmlpopover.html', {
                scope: $scope
            }).then(function (popover) {
                console.log('in the popover then function');
                self.popover = popover;
                self.popover.show($event);
            });
        }

You can call this function from your controller without a true click event, by faking the $event object.

How to Capture Enter View Event in Directive in Ionic/Angular

How to Capture Page View Enter Event in Directive in Ionic 1 Angular 2?

Directives do not get the normal $ionicView.enter events like controllers. You have to register for the parent view event using $ionicParentView.enter.

$scope.$on("$ionicParentView.enter", function (event, data) {
    // will fire enter event in your directive              
});

Note: Do not import $ionicParentView into your directive, this will cause your code to break.

Good luck!

How to Fix Your Apache setup on macOS Mojave using Brew

Every time Apple releases a major OS it seems to break my web development, so I switched my setup to use Brew which made things even more confusing –at first.

The folder locations might be a little different for you, but the point is: I was editing the wrong file and seeing no results.

Here are a few things to keep in mind when debugging your system issues:

1. There are two instances of Apache if you used brew (one from Apple, and one from Brew), and each is started differently

Brew: sudo brew services restart httpd
macOS: sudo apachectl -k restart

2. This also means I was looking at wrong httpd.conf files, there are multiple ones:

Brew: /usr/local/etc/httpd/httpd.conf
macOS: private/etc/apache2/httpd.conf

3. I also have different installation of php libraries now that I switched to Brew

(installed with brew install php@7.3)

Brew: /usr/local/etc/php/7.3/php.ini
macOS: /Library/Server/Web/Config/php/php.ini

Apple overwrites your httpd.conf file when upgrading the system, but it saves an old version, you just have to rename it.

Great instructions how to setup Apache on Mac using Brew ->
Setup Apache on Mac

Another good article how to Setup apache and php on macOS Mojave -> Apache on Mojave with multiple versions

Creating and Opening PDF on Ionic 1 on iOS

Recently I ran into an issue using the PdfMake on Ionic 1 on iOS. It works fine on the browser with a simple download or open command but not on the actual device.

Install the cordova libraries:

cordova.plugins.fileOpener2
cordova-plugin-file

Download the pdfmake javascript files and include them in your index.html

<script src='build/pdfmake.min.js'></script>
<script src='build/vfs_fonts.js'></script>

The code:

  var self = this ; // defined on top of the file

  var docDefinition = { content: 'This is an sample PDF printed with pdfMake' };

            self.pdfObj = pdfMake.createPdf(docDefinition);

            if (window.cordova) {
                self.pdfObj.getBuffer(function (buffer) {
                    var blob = new Blob([buffer], { type: 'application/pdf' });
                    // Save the PDF to the data Directory of our App
                    $cordovaFile.writeFile(cordova.file.dataDirectory, 'myletter.pdf', blob, { replace: true }).then(function () {
                        // Open the PDf with the correct OS tools
                        cordova.plugins.fileOpener2.open(cordova.file.dataDirectory + 'myletter.pdf', 'application/pdf');
                    })
                });
            }

Setup Config.xml

In your config.xml make sure you have the file settings

<preference name="AndroidPersistentFileLocation" value="Compatibility" />
<preference name="iosPersistentFileLocation" value="Library" />

Ionic HTTP posts don’t work on iOS

I ran into this strange problem today where HTTP requests stopped working on iOS alone. Even though I have the latest Ionic CLI, my project was running Ionic 1 still.

To solve this http error I removed this plugin:

ionic cordova plugin remove cordova-plugin-ionic-webview

And added this to config.xml:

<access origin="*" />
<allow-intent href="http://*/*" />
<allow-intent href="https://*/*" />
<allow-intent href="tel:*" />
<allow-intent href="sms:*" />
<allow-intent href="mailto:*" />
<allow-intent href="geo:*" />

Probably a bit unsafe to allow everything but had to get it working again.
If this doesn’t work for you try to also remove the iOS platform and re-add it.

good luck~

How To Embed and Open PDF files in Ionic App on iOS

This is a solution for storing and opening pdf files inside your app for offline use.

  cordova.plugins.fileOpener2.open(
        cordova.file.applicationDirectory + 'www/img/sample.pdf',
        'application/pdf',
        {
          error: function (e) {
            console.log('Error status:'+e.status+'- Error message:'+ e.message);
          },
          success: function () {
            console.log('file opened successfully');
          }
        }
      );

Opening the pdf should be fairly simple using the cordova.plugins.fileOpener2 plugin, but I ran into a strange issue because my app name in the config.xml contained a space such as: <name>My App</name>. This caused the iOS to misread the file path. Removing this space in the app name fixed the file path on iOS.

I put the sample pdf doc in the ionic project under my images folder www/img/sample.pdf.

Good luck!

Angular ng-show in ng-repeat not working in Ionic

The official Angular Docs Page for ng-show does not explain how to use this within a repeater.

The ngShow directive shows or hides the given HTML element based on the expression provided to the ngShow attribute. The element is shown or hidden by removing or adding the .ng-hide CSS class onto the element. The .ng-hide CSS class is predefined in AngularJS and sets the display style to none (using an !important flag).

The common mistake when using ng-show in repeater (ng-repeat) is the usage of angular brackets {{}}

  1. This example won’t work if the div is in a repeater:

<div ng-show="{{value == othervalue}}">

Use This Instead:

<div ng-show="value == othervalue">

Usually the app won’t complain and there won’t be any errors in the console, which makes debugging this edge case so difficult.

How To Use Ionic & Angular q Promises?

The Deferred API

A new instance of deferred is constructed by calling $q.defer().

The purpose of the deferred object is to expose the associated Promise instance as well as APIs that can be used for signaling the successful or unsuccessful completion, as well as the status of the task.

Methods

resolve(value) – resolves the derived promise with the value. If the value is a rejection constructed via $q.reject, the promise will be rejected instead.

reject(reason) – rejects the derived promise with the reason. This is equivalent to resolving it with a rejection constructed via $q.reject.

notify(value) – provides updates on the status of the promise’s execution. This may be called multiple times before the promise is either resolved or rejected.
Properties

promise – {Promise} – promise object associated with this deferred.

// for the purpose of this example let's assume that variables `$q` and `okToGreet`
// are available in the current lexical scope (they could have been injected or passed in).

function asyncGreet(name) {
  var deferred = $q.defer();

  setTimeout(function() {
    deferred.notify('About to greet ' + name + '.');

    if (okToGreet(name)) {
      deferred.resolve('Hello, ' + name + '!');
    } else {
      deferred.reject('Greeting ' + name + ' is not allowed.');
    }
  }, 1000);

  return deferred.promise;
}

var promise = asyncGreet('Robin Hood');
promise.then(function(greeting) {
  alert('Success: ' + greeting);
}, function(reason) {
  alert('Failed: ' + reason);
}, function(update) {
  alert('Got notification: ' + update);
});

This code example was taken from Angular Documentation page: https://docs.angularjs.org/api/ng/service/$q

How to use ng-disabled with multiple expression

You may have ran into this issue when trying to bind a submit button with multiple disable conditions. The easiest way to do this is to embed the variable checking in the html as follows:

Both variable must be false for the button to be disabled:

<button class="button" ng-disabled="(!data.var1 && !data.var2) ? false : true">
</button>

Either variable can be false for the button to be disabled:

<button class="button" ng-disabled="(!data.var1 || !data.var2) ? false : true">
</button>

How to Localize Your Ionic Project

How to localize, translate and support multiple languages in your Ionic / AngularJS project:

1. Install Angular Translate:

npm install angular-translate
npm install angular-translate-loader-static-files

2. In your index.html make sure you include the js files:

<!-- translations -->
<script src="js/angular-translate.js"></script>
<script src="js/angular-translate-static-files.js"></script>

If you cannot find these js files in your project folder then you can find them on the project github pages.

3. In your app.js add the translation loading

angular.module('starter', ['ionic', 'starter.controllers', 'pascalprecht.translate'])

.run(function($ionicPlatform) {
  $ionicPlatform.ready(function() {
    // Hide the accessory bar by default (remove this to show the accessory bar above the keyboard
    // for form inputs)
    if (window.cordova && window.cordova.plugins.Keyboard) {
      cordova.plugins.Keyboard.hideKeyboardAccessoryBar(true);
      cordova.plugins.Keyboard.disableScroll(true);
    }
    if (window.StatusBar) {
      // org.apache.cordova.statusbar required
      StatusBar.styleDefault();
      return StatusBar.hide();
    }
  });
})

.config(['$translateProvider', function ($translateProvider) {
  $translateProvider.useSanitizeValueStrategy('sanitize');

  $translateProvider.useStaticFilesLoader({
      prefix: 'locale/locale-',
      suffix: '.json'
  });

  $translateProvider.preferredLanguage('en');
}])

4. Create a locale json file

Create a file named locale-en.json and a locale folder
the file should be in your www/locale/locale-en.json
Do not include any //comments in the JSON file

{
  "HelloWorld": "Hello World!",
  "Name": "My Name"
}

5. Add localization in your html file

<label>{{ 'HelloWorld' | translate }}</label>

6. Translating within your javascript

Make sure you import $translate within your controller before using it.

 $translate('HelloWorld').then( function (translation){
    console.log(translation);
  });

Or if you need to translate multiple terms:

 $translate(['HelloWorld', 'Goodbye']).then( function (translations){
    console.log(translations.HelloWorld);
    console.log(translations.Goodbye);
  });

For more information visit https://angular-translate.github.io/docs/#/guide.

How to Deploy Your Ionic Node.js app to Heroku

In this tutorial I will explain how to deploy one of my Ionic starters to Heroku with Dropbox. Both dropbox and heroku have a free tier that you can use. If you get serious about your app you can upgrade to heroku professional account which is similar to Amazon’s service but much easier to use.

Prerequisite: Sign up for dropbox.com and download their desktop client. Use one of my ionic starters with a node.js backend or use your own node project.

1. Create an account on Heroku.com

Screen Shot 2016-04-25 at 11.42.05 AM

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