Swift

When we take the Test Driven Development(TDD) approach to write code we eventually ask ourselves a couple of questions: Have I covered all possible use cases? Have I written enough unit tests? What helps me is writing a bulleted list of functional requirements for the feature I am developing. Having a clear list of things…

Read More Swift TDD. How Many Unit Tests to Write?

When writing a Unit test for a piece of code, we need to isolate this piece of code from all other dependencies it has. These dependencies are objects of other classes that do not need to be tested in this particular unit test. For example, a piece of code we are unit testing might depend…

Read More Test Doubles in Swift – Dummy, Stub, Fake, Mock and Spy

In this short tutorial, you will learn how to set a different font on UIButton in Swift programmatically. There are lots of different customization you can with UIButton. For example, you might be also interested to learn how to create UIButton and change its style, background color, tint color and make it call a function…

Read More Set UIButton Font Programmatically in Swift

This blog post will give you a brief introduction to a Test-Driven Development(TDD) in Swift and will demonstrate how you can create a very basic Unit test in Swift to test a User Model Struct that holds the details of the Account Registration form. Assume that you need to follow the Test-Driven development approach to…

Read More Swift Unit Test of User Registration Model

In this tutorial, you will learn how to create UIButton programmatically. You will also learn how to do the basic customization of UIButton like setting button tint color, background color and making your button call a function when tapped. Create UIButton A new UIButton can be created of different types: ButtonType.custom, ButtonType.system, ButtonType.detailDisclosure, ButtonType.infoLight, ButtonType.infoDark,…

Read More Create UIButton in Swift Programmatically

In this tutorial, you will learn how to underline text on UILabel in Swift programmatically. To make the text on UILabel underlined we will need to use the NSMutableAttributedString together with NSUnderlineStyleAttributeName. The Swift code snippet below demonstrates how to create a new UILabel programmatically and then use the NSMutableAttributedString to underline the text on the label. Create a…

Read More Underline Text on UILabel in Swift

If needed, it is possible to make UILabel clickable in Swift although it is recommended to use UIButton instead. To make UILabel clickable in Swift, you will need to create a UITapGestureRecognizer and then add it to a label. In this tutorial, you will learn how to create UILabel in Swift programmatically and how to…

Read More Clickable UILabel in Swift Programmatically

In this short tutorial, you will learn how to remove a single item from a dictionary in Swift as well as how to remove all items from a dictionary. Create a New Dictionary Let’s say you have created the following dictionary with a few key-value pairs in it. var myDictionary = [“firstName”: “Sergey”, “lastName”: “Kargopolov”,…

Read More Remove an Item From a Dictionary in Swift

When writing code, we organize functionality into functions and group functions and different properties into classes. In Swift, additionally to creating classes we can also create structures or struct for short. Although very similar, Swift classes are different from swift structures. Comparing Structures and Classes According to Swift documentation, structures and classes in Swift have many…

Read More Swift Struct Tutorial with Code Examples