You probably received some unwanted phone calls on your iPhone and you wished you could automatically block these numbers. Or you were getting a call from someone that's not in your contacts, but you...
We already talked about CallKit and how to use the system UI to display the standard calling UI for incoming/outgoing calls. CallKit is great for displaying the UI, but what when your app is in the...
There's an easy way to display the system UI for incoming or outgoing calls, much like the standard phone app. In this article you'll get an intro to CallKit so you can provide a consistent...
App Thinning is one of those things that has been around for a while but a lot of people don't really know or care about it. If you're starting a project from scratch most of these things will be...
There's a great little library that will generate classes for accessing your resources, making them type-safe. It's very simple to use and it will make your life a lot easier. In this article we'll...
Spotlight is a great feature that can make life a lot easier for your users. It's build into the system and the users are familiar with it. You can easily integrate with Spotlight by indexing your...
Spotlight Search is a great feature that adds to the user experience. It's very simple to use and with just a little effort you will add a great functionality to your apps. In this short tutorial...
Privacy is very important today and we have a couple of options to encrypt our users' data on iOS. We already have common crypto available on iOS but recently I came across a much simpler library...
We're all used to the default transitions between view controllers that we get for free. But sometimes we just want to keep the users' attention to certain elements. Custom transitions are a great...
RxSwift uses quite a lot of operators utilizing reactive patterns. It is a core part where its magic happens. The Clarke's third law says: Any sufficiently advanced technology is indistinguishable...
Managing state in your app is not an easy thing to do. Even in a relatively simple app there's a lot of things going on. Users log in, data is being refreshed from multiple sources, errors start...
It's important for our users to have strong passwords. But, strong passwords are usually tedious to type in and often frustrate the users, not to mention that they're hard to remember. In this...
There's a really simple way to read barcodes, QR codes and all sorts of machine readable code by using nothing more than AVFoundation. In this quick article we'll be reading barcodes and QR codes...
Almost every project that you'll work on will have some bugs in it. On some legacy apps you might even spend most of your time debugging. In this article we'll cover some debugging tips&tricks to...
libPhoneNumber-iOS is an iOS port of the Google's libPhoneNumber library. It's very simple to use and with cocoapods it's real easy to get started with it. In this blog post we'll go over setting up...
ResearchKit is a different kind of a framework. It's used in apps that are conducting medical research. Apple has made this framework completely open source and anyone can contribute to it. It's...
HealthKit is Apple's framework for managing health data. In this article we'll go over the basics of using HealthKit and show you how you can read and write data to the health store. We'll create a...
Password strength meters are a great way to visually indicate to the users if their password is acceptable. Implementing one from scratch is no easy feat. Fortunately, dropbox has developed an open...
We don't have a garbage collector in swift, so we need to understand the memory graph of our apps. If we're not careful with object references we can easily create strong reference cycles and leak...
When your users are using your app, they expect it to behave like it's constantly running. As you know, iOS can kill your app at any time in order to reclaim system resources. There's an easy way to...
This year the logging framework got a bit of an update. The most notable is definitely the ability to add signposts throughout your code with the new os_signpost functions. Signposts are a great tool...
AVSpeechSynthesizer is a part of the AVFoundation framework that's used to convert text to spoken audio. It's a great tool for converting text to speech and it works surprisingly well. In this short...
Working in swift (and ObjC) you should be comfortable working with async code. Sooner or later you'll run into a problem called 'callback hell' where in the completion handler of one method you're...
Some time ago I wrote on using realtime database from firebase and about Firebase Cloud Messaging. In this article we'll talk about using Firebase Cloud Functions. With Firebase Cloud Functions you...
fastlane is a very popular automation tool for developers. It can do so much for you: manage code signing, create screenshots, publish betas, upload release builds to iTunes Connect, manage your...
There's a lot of boring tasks that you can automate in your development career. Taking screenshots is definitely one of them. fastlane comes bundled with a nice little tool that makes this very...
If you ever worked in a team you know how messy certificates and provisioning profiles can get. Lately Xcode mitigates most of these age-old problems, but there's one little tool that brings a whole...
Keyboard handling code is something you'll use and reuse across your project. There's a very simple way that you can do this using interface builder objects. It's as simple as dropping an object and...
Unified logging system in a relatively new logging mechanism that was introduced with iOS 10. It's blazingly fast and gives you a fine-grained control over your logs. In this article we'll explore...
You probably know what Google Drive is, just in case you don't... it's a cloud bases storage. In this article we'll walk you through the setup procedure and cover some basic scenarios on how to use...
URLSession has a great feature where you can download files while your app is in the background. In this article we'll go over setting up your app to use this great little feature. We'll focus on...
Last week we talked about Realm Database and how to get started with it. This week we'll dive in a bit deeper in Realm. Realm has a nice feature called 'Synced Realms'. It's a database that's hosted...
Realm is an alternative to Core Data on iOS and it's also cross-platform. In this blog post we'll setup Realm Database for our little demo project and we'll check out some basic features that you'll...
TwitterKit offers you loads of functionality: login, sharing, viewing your timeline... In this post we'll learn how to setup your twitter app and start using TwitterKit. We'll cover some basic use...
If you have a free app and you're thinking of ways you can monetize that app one of the most common ways is to put some ads in the app. In this article we'll quickly go over how to set up AdMob and...
Today widgets are small view controllers that your users can add to their 'Today' view. They are good for displaying the most relevant information to your users. In this article we're going to create...
When I was setting up In-App purchases I never dreamed that I'd be spending so much time setting things up on iTunes Connect. Implementing it in the app was actually quite simple. In this article...
Handoff is a great way for your users to resume an activity on any device. Let's say your users start reading an article on an iPhone, they can easily continue reading it right where they left off on...
If you ever needed to share data between your iOS apps and/or your application targets, there's a very easy way to do this using app groups. In this post we'll see how to share data between two apps...
If you need to know when a file has been modified, renamed, deleted... there's an easy way to do it using dispatch sources. In this post, we'll create a simple library that will notify you when a...
Working on big projects with big code base composed mainly of "legacy code", developer's biggest fear is to introduce something new that might actually break something old. This fear freezes the...
If you have an iOS app and you wanted to have push notifications, Firebase offers a simple way to integrate push notifications into your app. And best of all, it's free. In this post, we'll cover...
Firebase is an online database. It's called 'Realtime Database'. But it's much, much more than that. In this post, I'll go through one of my apps and the process of converting it from my REST API to...
NSCache is a great way to cache items like images. What I wanted was to persist the cached items and at the same time have a cache that's really easy to use. I came up with a little class that's...
If you want to display complex layout you could easily spend a week working on one view controller. Fortunately, there's an easier way. You can use a web view to do this. In this article, we'll take...
With iOS 10 we got access to Siri. We got limited access, but still, we can do some cool things with it. In this post, I'll go over the details on how to setup Siri in your app and one example use....
A few weeks back I wrote an article on dependency injection and how to use it. Here I'll cover how to use dependency injection in your unit tests. Dependency Injection I won't talk a lot about...
In this post, we'll cover one very useful technique called dependency injection and we'll look at some examples on to use it in your iOS project. What is it? Dependency Injection is a technique where...
In this article I'll explain how to use map clustering with quad trees using GoogleMaps for iOS. This was done back in December 2015 as back then Google did not have map clustering available for iOS....
In this short blog post, we'll cover some basics on how to use the keychain on iOS, and we'll create a simple wrapper for the keychain. You've probably heard of an iOS keychain. If not, it's a secure...
In one of my previous posts, I talked about how to create a temperature sensor using an Arduino and a BLE breakout circuit, and how to read that data from your iOS app. You can read more about it...
Today we'll create something cool, a temperature sensor and an iOS app that connects to it. For this project, we'll be using an Arduino with a BLE breakout circuit. On the iOS side, we'll be using...
We all hate entering passwords on our devices, you have to remember the right password, type it in... It's a drag. Well, since iPhone 5S we've got a fingerprint sensor, also called Touch ID. We would...
With iPhone 6s came the 3D touch, and with it we got a few more options to interact with the users. In this short blog post we'll examine one of those options called 'Application Shortcuts', or...
You all heard of Siri :) It's an online Voice Command and Text-To-Speech engine. Recently I ran into a great framework for offline voice command and text to speech, and it works great. It's called...
Using iBeacon is pretty straight forward, what I wanted to do is use the service in the background, and send a request to the server every time a user enters/exits a region. I'll explain how I did it...
Creating a grayscale image is not a problem in iOS, but I wanted to be able to animate an image view from grayscale to full color. It turned out to be a pretty simple operation, all you have to do is...
Google Maps for iOS can't show all Info Windows (unlike the Android version). But there's an easy way around this limitation. All you have to do is render your Info Window along with your pin icon as...