Optionals in Swift: The Ultimate Guide

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By Aasif | December 9, 2021 3:07 pm  | 6-min read

In Swift, optionals are nil or have a value. Before you can use an optional, you’ll need to unwrap it. Optionals are a powerful feature of the Swift programming language, because they make your code safer and more productive. And as an iOS developer, it’s important you know how to use optionals. In this tutorial, I’ll give you a complete tour of optionals in Swift. We’ll find out what they are, why they’re useful, and how you can work with them to make your code safer, more bug free [...]

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Switch Statements in Swift Explained

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By Aasif | December 9, 2021 2:21 pm  | 4-min read

The switch statement in Swift lets you inspect a value and match it with a number of cases. It’s particularly effective for taking concise decisions based on one variable that can contain a number of possible values. Using the switch statement often results in more concise code that’s easier to read. In this tutorial, you’ll learn how to use the switch statement in Swift. We’ll get into: What the switch statement is, and what it’s for How to set up the different cases for switch [...]

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Working with UserDefaults in Swift

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By Aasif | December 8, 2021 7:25 pm  | 5-min read

The UserDefaults object, formerly known as NSUserDefaults, is exceptionally useful for storing small pieces of data in your app. You use it to save your app user’s settings, set some “flags”, or simply use it as a tiny data store. In this tutorial you’ll learn: How to set and get data with UserDefaults When it’s best to use UserDefaults (and when not…) How to work with user defaults to improve your iOS development Table of Contents What are UserDefaults? Saving Dat [...]

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Guard Statement Explained in Swift

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By Aasif | December 8, 2021 6:56 pm  | 4-min read

The guard statement in Swift helps you return your functions early, if a condition isn’t satisfied. In this tutorial we’ll discuss what guard is, and how you can use it in practical iOS development. Here’s what we’ll get into: How guard works and when it’s smart to use How to unwrap optionals with guard let Why it’s important to “early return” a function Using guard in practical iOS development Table of Contents How To Use “guard” in Swift Early Returns [...]

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Which MacBook is Good Enough for iOS Development?

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By Aasif | December 8, 2021 6:23 pm  | 4-min read

How fast does your MacBook need to be to comfortably code iOS apps with Xcode? Is a MacBook Pro from 2-3 years ago good enough to learn Swift programming? Let’s find out! Here’s what we’ll get into: The minimum/recommended system requirements for Xcode 11 Why you need – or don’t need – a fancy $3.000 MacBook Pro Which second-hand Macs can run Xcode OK, and how you can find out I’ve answered a lot of “Is my MacBook good enough for iOS development and/or Xcode?”-type q [...]

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