There are plenty of reasons to get into App development. You might start off making some Apps for yourself, or your friends. You might even make a few of these Apps for the store, and Monazite them to gain income.

But what if you want to go professional? That is, get a job.

If you ask some businesses what experience and skills they would like their junior developers to have, you might see some (perhaps all) of the following:

• Development experience on the iOS platform using Xcode, using Swift
• Creative, hardworking and an eye for detail
• Excellent communication skills

They…

Difficulty: Beginner | Easy | Normal | Challenging

This article has been developed using Xcode 12.4, and Swift 5.3.2

You can access a video version of this article @https://youtu.be/Szjjj4rWMIs

A simple problem that requires an article — now perhaps you want to lazy load images in a UITableView; but how would you possibly do that?

Even more important — how can we use dependency injection for this?

Prerequisites

You will be expected to be aware how to make a Single View Application in Swift.

The standard answer

You can use an extension for this, so we can call it straight after setting the image…

Taking an example project from LeetCode, I might try to find the answer for 1413. Minimum Value to Get Positive Step by Step Sum.

Now I told a lie, in one of these articles. Specifically in my Playgrounds article I said I don’t use Playgrounds for LeetCode challenges because of the setup. I actually don’t use Playgrounds because sometimes they are slooow, or don’t seem to work for me when I first start a new Playground. I don’t know why, perhaps it’s because I’m using a 2016 MBP? …

Difficulty: Beginner | Easy | Normal | Challenging
This article has been developed using Xcode 12.4, and Swift 5.3.2

There are many reasons that you might wish to reduce the amount of code and complexity contained within any particular view controller.

One approach that you should have in your amoury is that of splitting a view controller into mutliple smaller ones — but we should be careful of HOW we do tht in order to avoid just moving code around and instead put code into more sensible homes.

this article, hopefully, can help you out

If you would like to…

Make it fit the content

Difficulty: Beginner | Easy | Normal | Challenging

This article is paired with a YouTube video, that covers similar ground.

Keywords and Terminology:

Auto Layout: A constraint-based layout system intrinsicContentSize: The natural size for the receiving view, considering only properties of the view itself

Prerequisites:

There aren’t any, although you will need to set up a project, although you might like to read through subclassing a UIView

What is this article about?

Each view should have an idea amount of space that will display it’s content. For example a UILabel has a width and height that is based on the size of the text it contains. …

I’ve often used creating a Command-line Mac OS application to complete LeetCode problems. This means that I’ve been able to use breakpoints in my answers and make sure that I’m thinking in a more strategic way.

But why don’t I use Playgrounds?

The main reason is understanding what setup is required. This article is here to explain how to setup playgrounds, and guide you through the process.

The supporting video is @ this link

Setting up Playgrounds

In order to use testing in Playgrounds, we need to import XCTest and create a class that conforms to the XCTestCase protocol, and then run className.defaultTestSuite.run().

…

Difficulty: Beginner | Easy | Normal | Challenging
This article has been developed using Xcode 12.4, and Swift 5.3.2

This article has a supporting video at: YouTube video

Prerequisites

• You just need to be able to create a Swift project, but it might help you to read over the Date and Time Cheatsheet

The background

You will almost certainly need to communicate with a backend through a published API. In fact, you might use an API like the Twitter API that is stable and well documented.

Now depending on why you are using an API, you might well have a date/time returned to…

If you are using closures in your Swift code, you may become familiar with the shorthand parameter syntax. That is, parameter names are often represented as $0 or $1.

You may or may not be aware that these continue, in that for each parameter the shorthand name is incremented by one each time ($2 and $3 up to the number of arguments as is required in your code).

Why you should use shorthand parameters

Rather than having to think of parameter names, and making our code less easy to read as a result you might use shorthand parameters. The emphasis is on the might.

Why you should stop using shorthand parameters

Rather…