In today’s article, we’re going to add a health bar to an iOS app entirely programmatically in Swift 5. In the process, we’ll gain experience with UIProgressView, UIImageView, GestureRecognizer, Constrains, and Animations. By the end of this tutorial, you will have made an enemy on the screen with a health…

I recently came across a coding interview question that asks the programmer to distribute some number of items, to a row of n people in the following way: The Interview Question We start our first turn by giving 1 item to the first person, 2 items to the second person, and so on…

There are four built-in data structures in Python — lists, dictionaries, sets, and tuples. Knowing, or at least being familiar with, the time complexities of the operations associated with each data structure will allow you to judge when your algorithm is getting faster or slower. For the purpose of this article, we will be discussing each operation’s time complexity in terms of its big O time as the industry has defined it. Here’s a refresher on some of the most common time complexities found in computer science.

When it comes to Computer Science, there are four main algorithms that you need to have in your arsenal. Bubble sort, selections sort, merge sort, and quickSort. Adding just these four algorithms to your collection of knowledge will certainly make you a better and more efficient programmer. 1. Bubble Sort: Description: Start at…

Step 1: Make a new Xcode project and delete Main.storyboard as we won’t be needing it for this tutorial. Step 2: Next, open Info.plist and delete the“Main storyboard file base name” line and the “Storyboard Name” line

Scroll views allow for scrolling and zooming in your iOS App. Today we’re going learn about how to add images to them by taking advantage of their “contentSize” attribute. The content size of a UIScrollView refers to the width and height of its content view. When a UIScrollView’s content size is larger than the phone screen, then scrolling is enabled. Step 1: Create a new Xcode project and navigate to ViewController.swift

For this tutorial, we will be embedding a horizontal UIScrollView inside a vertical UIScrollView Step 1: Define our variables and set up our ViewController’s subviews Step 2: Now that we have implemented all of our code in ViewController.swift all we need to do is add 6 pictures to our Assets.xcassets folder. If you want the images to appear, then ensure that you have named the image files the same as I have (i.e. 1, 2, 3, 4, 5 and 6).

Detecting whether a user has exited your application (e.g. pushed the home button) can be highly beneficial in creating an iOS app that is reactive to what its users are doing. …

For the sake of this article, I will be doing everything programmatically. Make a new textField in your ViewController.swift file and add constraints 2. Set the textField’s delegate to self. Place paste this code on the line below the textField’s constraints (under line 21). 3. Extend the ViewController class with the following code. The textFieldShouldReturn function will be called whenever the return button is clicked.