Understanding The “Use of Unresolved Identifier” Error in Xcode

Aasif
By Aasif | Last Updated on December 22nd, 2021 6:43 am | 5-min read

It’s one of the most common errors in Xcode: Use of unresolved identifier. This error simply means that Xcode doesn’t mean what you’re talking about. But… how do you solve it? This tutorial lists 3 ways you can solve the Use of unresolved identifier error. With these 3 methods you can fix 90% of the causes of the error. Table of Contents What Does “Unresolved Identifier” Mean? 1. Check Your Code For Typos 2. Look Up The Exact Error Message 3. Use Auto-Complete or Quick [...]

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A Very Exclusive Holiday Season Offer From Appy Pie!!

Jayraj
By Jayraj | December 20, 2021 5:54 pm  | 3-min read

Who doesn’t like gifts? We all love gifts. And given the fact that the holiday season has begun, why should Appy Pie shy away from it? Keeping the holiday season in mind, Appy Pie brings you its greatest festive offer yet! This holiday season, get the most out of Appy Pie at half the price!!! For 2021, Appy Pie brings you a WHOPPING 50% OFF on its finest products. With Appy Pie’s holiday plan, you can take your business to the next level and grow it to its full potential. Table of [...]

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Inheritance and Subclassing Explained in Swift

Aasif
By Aasif | Last Updated on December 22nd, 2021 6:43 am | 5-min read

With subclassing, a class can inherit functions and properties from another class. That allows you to reuse your code, which is a good thing. In this tutorial, we’ll discuss how you can use subclassing and inheritance in Swift. Here’s what we’ll discuss: What’s subclassing and inheritance, and why do you need it? Overriding functions with override and super A unicycle is a bike is a vehicle… Why you can and cannot override properties Alternatives to subclassing, like protocol [...]

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Introduction to Grand Central Dispatch with Swift

Aasif
By Aasif | Last Updated on December 22nd, 2021 6:43 am | 5-min read

Computers can’t live without multithreading and concurrency. You know why? CPUs are kinda dumb – they can only do one thing at a time! You can use Grand Central Dispatch (GCD) with Swift to make your app execute multiple tasks concurrently. Grand Central Dispatch is paramount to keep your app responsive, with buttery smooth animations and transitions. In this tutorial we’re taking a look at multithreading, background processing and Grand Central Dispatch. You’ll write a bit of code an [...]

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The @State Property Wrapper in SwiftUI Explained

Aasif
By Aasif | Last Updated on December 22nd, 2021 6:43 am | 4-min read

With @State, you tell SwiftUI that a view is now dependent on some state. If the state changes, so should the User Interface. It’s a core principle of SwiftUI: data drives the UI. But how does that work? In this tutorial, we’ll discuss how you use @State with SwiftUI. We’ll create a simple view that updates some text as you type in a text field. And of course, we’ll deconstruct what’s going on behind the scenes, too. Here’s what we’ll get into: How does @State work in Swif [...]

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