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iOS development

A collection of 32 posts

Type Casting in Swift

iOS development

Type Casting in Swift

In object-oriented programming, type casting is used to treat an object as one of another type. In this article we will discuss how this works in Swift. Car and Vehicle Let’s start by defining the test classes car and vehicle: class Vehicle { } class Car: Vehicle { } Now we can declare

UIAlertController

iOS development

UIAlertController

UIAlertView and UIActionSheet are deprecated since iOS 8. The new way to go is UIAlertController, which can be configured as an AlertView or as an ActionSheet. UIAlertController: AlertView Style First, let us create an instance of UIAlertController: let alertController = UIAlertController(title: "Title", message: "A message", preferredStyle:

How To Stay Up-To-Date On iOS Development

iOS development

How To Stay Up-To-Date On iOS Development

iOS development is changing very quickly. Not a long time ago, nobody knew about Swift and size classes. Today, they are essential tools and techniques every iOS developer should know. So learning regularly is very important for every iOS developer. However, it is not easy to stay up-to-date. In this

UIPopoverPresentationController

iOS development

UIPopoverPresentationController

Since iOS 9, UIPopoverController is deprecated. Time to look at UIPopoverPresentationController, which has been introduced in iOS 8. Hint: This post has been updated to Swift 3, Xcode 8 and iOS 10 Presenting a Controller as a Popover Presenting a controller as a popover is very straightforward with UIPopoverPresentationController. You

Swift Playground: The Monty-Hall-Problem

iOS development

Swift Playground: The Monty-Hall-Problem

The Monty-Hall-Problem is a very confusing probability problem. Instead of doing mathematics, we will experiment on a Swift playground. Hint: This post has been updated to Swift 3 The Monty-Hall-Problem The idea is very simple. It is explained in Parade magazine in 1990: Suppose you’re on a game show,

NSURL and NSURLComponents

iOS development

NSURL and NSURLComponents

NSURL and NSURLComponents are classes for handling URLs (Uniform Resource Locator). In this post we discuss the most important features of these classes. Initialisation of a NSURL object The initialisation of a NSURL object is very straight forward. The most common way is by specifying a string: let url1 = NSURL(

iOS development

Swift: Enums

An enum is a data type that has a finite set of possible values. In this post we discuss will the most important aspects of enums in Swift. Hint: This post has been updated to Swift 3 Declaration The declaration of an enum is very straightforward in Swift. You do