Swift

To get the length of a string in Swift, call the String.count property. For example: Output: Replace ‘count’ with ‘length’ in Swift Swift developers decided to call the length of a string ‘count’. However, if you prefer ‘length’ over ‘count’ you can change it by writing an extension to the String class. Naively, you could […]

To check the Swift version of your current Xcode project: If you click the Swift version you are going to see other Swift versions in a dropdown. These are all the other supported Swift versions available for this project. How to Check the Swift Version Programmatically To programmatically find out the Swift version of your

To load an image from a URL in Swift, extend the UIImageView to support loading images with the following class extension: Now you can call the loadFrom(URLAddress:) function for any UIImageView in your project. Example. If you have an UIImageView called myImageView + an image behind a URL in example.com/image.png, you can get and show

In Swift 5, you can hide the keyboard by touching anywhere on the screen with these two lines of code: This code adds a tap gesture recognizer into the current view that listens for actions that suggest that the user stopped editing the text field/text view. To make this code work, add it into your

To filter an array in Swift: For instance, let’s filter an array of words such that only words less than 4 characters long remain: Output: This is the quick answer. But to know how filtering really works in Swift, please read along. How to Filter an Array in Swift In the introduction, you saw a

You can use a final class in Swift to disable the inheritance of the class. For example, let’s create a class Student and make it a final class to disallow inheritance: If you now try to subclass this class, you are going to see a compile-time error: Output: This error says it is not possible

A completion handler in Swift is a function that calls back when a task completes. This is why it is also called a callback function. A callback function is passed as an argument into another function. When this function completes running a task, it executes the callback function. Example Here is a demonstrative (but not

To get the current time in Swift: For example, let’s show what time it is right now in the console: Output: A Deeper Dive Let’s take a closer look at the above Swift code. This Swift code imports the Foundation framework, which provides fundamental data types, collections, and operating-system services to the Swift programming language.

To calculate the time difference between two Date objects in seconds in Swift, use the Date.timeIntervalSinceReferenceDate method. For example, let’s calculate how many seconds is between Christmas and New Year: Output: Date Difference Extension in Swift If you need to compute time differences between two dates more often in your project, feel free to write

In Swift, looping with an index is a common technique used to iterate through a collection of items and perform some operation on each item. This technique is useful when you need to access individual elements in the collection, modify them, or perform some calculations based on their position. By using a loop with an