You’re not restricted anymore!
Difficulty: Beginner | Easy | Normal | Challenging
This article has been developed using Xcode 12.0, and Swift 5.3
Prerequisites:
- You will be expected to be aware how to make a [Single View Application](https://medium.com/swlh/your-first-ios-application-using-xcode-9983cf6efb71
- You should be able to handle segues, but I’m sure you can do that already
- You should be aware of, or have some interest in Dependency Injection)
Dependency Injection
Motivation
High level modules should not be dependent on low-level modules, but rather abstractions. If this is true, we can swap out classes rather than making a fixed dependency for a concrete class.
Why it matters
A whole project?
Before we start
Difficulty: Beginner | Easy | Normal | Challenging
The video
The content of this article is covered in the following video!
Prerequisites:
- This article skips over setting up a project, and gets rid of the storyboard and uses programmatic constraints as in this article
- Later in the article a real example is used, that is Decoding JSON and the internal workings of this are kind of skipped over
- If you are interested in testing, or a more in-depth explanation of JSON decoding you can look at this article
Keywords and Terminology:
JSON: JavaScript Object Notation, a lightweight format for storing and transporting data Swift: An…
It all went wrong!
Difficulty: Beginner | Easy | Normal | Challenging
When you are looking through the use of Protocols in Swift, you’ll come across [Dynamic Dispatch].
When a type adopts a protocol and an instance of the type is inferred to be a concrete type, all of the protocol methods are statically dispatched at compile time.
So a concrete instance of a Dog can conform to a protocol Animal, and here fluffy is inferred to be of concrete type Dog. …
You don’t need a backend (right now)
Difficulty: Beginner | Easy | Normal | Challenging
This article has been developed using Xcode 12, and Swift 5.3
Prerequisites:
- Be able to produce a “Hello, World!” iOS application (guide HERE) However, the implementation for this uses my network manager, my API builder and a snippet to parse data
Terminology
Charles: A HTTP proxy for development
A warning
Be careful because many guides instruct developers to turn off the mac proxy, but using this simulator this prevents the developer seeing the data from their target App!
It will make them better, promise
I’ve written one or two articles on Medium in my time, and most of them are based around creating a journal around my programming adventures, primarily coding in Swift.
Then I discovered that it is all too difficult to read
What is worse is that I made the same mistake multiple times, in different ways. You might think that isn’t possible, but I’m here to tell you that it is, in fact possible.
Code blocks
So what I started doing, in the beginning was to simply write code in one of Medium’s code blocks:
print ("Hello, World!")It is all clear, understandable…
Do yourself a SOLID
SOLID is a mnemonic acronym for five design principles intended to make software designs more understandable. Now applying them to Swift can be a little tricky, and this article has been written to make the Single Responsibility Principle easy to understand for new Swift Programmers.
Solid.
Difficulty: Beginner | Easy | Normal | Challenging
Terminology
Class: An object that defines properties and methods in common
Single Responsibility Principle: every module or class should have responsibility over a single part of the functionality provided by the software, and that responsibility should be entirely encapsulated by the class, module or function
SOLID: a…
Get rid of unreadable habits
Difficulty: Beginner | Easy | Normal | Challenging
Look, I’m not the best person at anything. Enforcing my own coding standards for my own projects? Awful. I can’t even speel well in my Medium Posts.
Is there some way that I automate writing better Swift?
Before we start
Who is this guide for?
You might say that the steps for this article are contained in the repo for SwiftLint: https://github.com/realm/SwiftLint, indeed they are.
But this is a beginners guide with a repo that contains a example of the implementation and the code that I’ve run through.
What is SwiftLint for?
SwiftLint is for enforcing Swift coding style and conventions. This means that…
It’s a New Year!
Perhaps you are looking for a new job, or are thinking about upgrading your developer self.
Why not use this quick list of Interview Questions and Answers?
Hand-picked and selected for 2021, these are the terms and questions that you need to know for your iOS dev role!
The List
app ID / bundle ID App ID identifies one or more Apps from a development team. Bundle ID uniquely identifies each App. AppID is local, BundleID is on Apple’s side.
Access control open, public, internal, fileprivate and private.
App states Not running, inactive, active, background and suspended. Not…
The view coordinate system is really important
Difficulty: Beginner | Easy | Normal | Challenging
Prerequisites:
- This article has been written in the Playground displaying a UIViewController, although you could do the same in a Single View Application
The View coordinate system
The Units and structs used
CGFloat: A floating point number used for graphics
CGPoint: A C struct containing two CGFloats
CGRect: A C struct with an origin and a size (both of which are representated as a CGSize). Can be initialised with CGRect(origin:, size:) or CGRect(x: 0, y: , width: , height: ) . The origin is represented as a CGPoint.
CGSize: A C struct with a width and height.
The origin
The origin of any particular…
Create it from Scratch in Swift, for fun!
This article is going to show you how to make a snowy App using Swift.
It is going to look like the following:
