In this tutorial, you will learn how to load an image from a remote URL in Swift and display it in your mobile app. If you are new to working with images have a look at the following two tutorials first: Create UIImage and UIImageView programmatically, Create UIImageView with rounded corners in Swift. Create an…
Read More Load Image From Remote URL in SwiftIn this Swift tutorial, you will learn how to make UIImageView corners rounded. To learn how to programmatically create new UIImage, add it to UIImageView and make it visible in your app, have a look at the following tutorial: Create UIImage and UIImageView Programmatically Create UIImage and UIImageView To make image corners rounded, I will…
Read More UIImageView Rounded Corners in SwiftIn this tutorial, you will learn how to create UIImage and UIImageView in Swift programmatically. Add Image to Xcode Project For your app to be able to display an image, the image needs to be either added to your app bundle or loaded from the Internet using an image URL. For this tutorial, I will…
Read More Create UIImage and UIImageView ProgrammaticallyIn this tutorial, you will learn how to read and cancel local user notification request(UNNotificationRequest) or how to remove the pending or even delivered notifications from a User Notification Center UNUserNotificationCenter. To learn how to create, schedule and display user local notifications read the following tutorial: User Local Notifications with UNUserNotificationCenter. Notification Request Identifier When a UNNotificationRequest…
Read More How to Read and Cancel Local Notification RequestsIn this tutorial, you will learn how to create, schedule and handle local alert Notifications using the UNUserNotificationCenter in Swift. Local Notification vs Push Notification One of the main differences between Local notification and a Push notification is that local notifications are created, scheduled and are sent from a user iOS device. Push notifications are…
Read More Local User Notifications with UNUserNotificationCenterIn this tutorial, you will learn how to make UILabel automatically adjust its width to make the text fit. When the text on UILabel is longer than the width of the UILabel it does not fit. Below is an example of a UILabel with a text that does not fit. When Text Does Not Fit…
Read More Make UILabel Adjust Width to Fit TextIn this tutorial, you will learn how to use the XCTAssertThrowsError assertion in Xcode Unit Test. The XCTAssertThrowsError asserts that an expression throws an error and it helps us write a unit test to verify that a method under the test will throw an error if we give it input parameters that cause an error.…
Read More XCTAssertThrowsError Assertion ExampleIn this XCTest tutorial, you will learn how to write a unit test that will test if UIButton is connected to @IBOutlet and has @IBAction assigned. For this tutorial, I will create a Single View application project. I will use the default View Controller that XCode creates for all new projects and I will position…
Read More XCTest. Test if UIButton is Connected And Has ActionAll unit test methods use Assertions to validate the result produced by the System Under the Test and present the user with a test method result. It is the assertion that will make a decision whether the test method is passing or failing. This blog post contains a list of assertions you can use with…
Read More A List of XCTest AssertionsIn this tutorial, you will learn how to build and run Xcode Unit Tests from the command line. Command Line Tools Package for Xcode To be able to build and test your project using the terminal window you will need to have the Command Line Tools package installed on your machine. If the machine you…
Read More Run Xcode Unit Tests From The Command LineWhen writing code we come up with method or function names all the time. And it is pretty much up to us developers how to name our methods. When writing Unit Tests in Xcode there are a few little requirements for a test method name which we must follow if we want our test method…
Read More Naming iOS Unit Test MethodsThere is a number of ways to disable a unit test in Xcode although it might not seem very obvious at first. In this blog post, I will share with you just a few that I personally use from time to time. Why Disable Unit Test? I am a strong advocate to always write unit…
Read More How to Disable or Skip Unit Test in XcodeUnit tests in Xcode can run in different orders. They can run in alphabetical order, randomized or executed in parallel. The default order in which Xcode runs unit tests is alphabetical. In this blog post, you will learn how the alphabetical order works. The Flow of Unit Test Execution For each test method, a new…
Read More The Order of Unit Tests in XcodeWhen 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