Archive

Currying allows you to turn a single function with multiple arguments into a series of functions – each with one argument. This allows you to store variables in functions and also create functions that return functions. Functions that return functions First of all lets look at a function that returns a function. The following code […]

In this tutorial we take a look at the newly ARKit introduced at WWDC 2017. You can use it with Swift 4 & iOS11 onwards. ARKit allows you to easily create augmented reality apps that have good performance. Storyboard Setup First of all setup the Main.storyboard as follows: ARSCNView with constraints to take up the […]

In this tutorial we take a look at the newly CoreML Kit introduced at WWDC 2017. You can use it with Swift 4 & iOS11 onwards. Core ML allows you to use machine learning on your iPhone or iPad! You can either train it outside your phone & also train your machine leanings model on […]

XCode has a wide variety of shortcut and handy features that are often overlooked. Especially if you are an new developer, or independent developer you usually either accidentally discover these nuggets, or never know they are there. Lets look at the top 5 tips for XCode productivity, for both Swift and Objective-C development. XCode Tip […]

In this tutorial series we are going to look at building commonly used apps in Swift. The first one we are going to look at is building the YouTube app – this will be a several part series as there is quite alot involved. In this post we will look at setting up the basic […]

In one of our previous tutorials we looked at extensions. In this one we will look at how we can use these to setup a custom UIColor extension to do the following: Add set custom colors to our Swift project Initialize a UIColor from hex Initialize a UIColor from RGB First of all we have […]

Swift Extensions are quite a powerful feature and Swift and can greatly speed up your productivity. If you haven’t used them yet your in for a treat. What are Swift extensions? Extensions allow you to “extend” the functionality of an existing Swift class. It allows you to add custom methods to these classes which can […]

As you develop iOS apps you will use more and more features of the UIViewController. You will want code to run before the view shows to the user, after it shows and after it disappears. It’s important to understand the UIViewController lifecycle, and the following stages of it: viewDidLoad() viewWillAppear(_ animated: Bool) viewDidAppear(_ animated: Bool) […]

What are lazy vars, what do they do. Lazy sounds like a bad thing right? Lets first take a look at how variables work to then understand the benefits of lazy vars. What are lazy vars? When you declare a variable in Swift it takes up memory and also takes time to set the variable […]

Setting up an app to send an email from the user’s phone is simple. You can setup your app to open the mail app and fill out the To, CC, Subject and Mail Body fields with your own custom content. Then the user can send an email from the phone with all this filled out. […]