Swift functions take parameters that are constants and cannot be changed. To change this function's parameters we have this inout. This lets us change the parameter outside the function and the original value outside the function is also changed. Let's take an example of a function that increases count: func increaseCount(count: inout Int) { count = count + 1 } Passing value We will now pass our value to the input parameter with an & and the variable name to use the above function.

What is a memberwise initializer? — A memberwise initializer is an initializer that is added by default to structs by the compiler and these do not define the custom initializers. Let's consider this struct People, with two constant properties name as String and age as Int Because People struct has no custom initializer, the compiler generates…

Almost every app now has QR be it authentication, more info and much more. Today let's dive right in and check how we can add a QR scanner to our iOS app. Do not forget to add the camera permissions in your info.plist. In your storyboard, add the UI you…

As the name goes, property wrappers in swift is a type that wraps the value with additional logic to it apart from just read and write. Implementing this is quite easy and also leverages your code reusability. Your struct or class can be annotated with the @propertyWrapper attribute. …

SwiftUI provides us with the @StateObject property wrapper which is essential for state management. A property wrapper type that instantiates an observable object. It creates an instance for that particular view and stays alive in it or the view where you share it. The best part about @StateObject is swift…

The screen sizes vary for iPad and iOS apps, which requires different constraints every time you switch your device. One approach to this is of course the “Vary for Traits” where you give a specific constraint for each trait. But another approach could be adding a whole new storyboard just…

The iOS 14 SDK introduced many improvements and new APIs that allow developers to write efficient code. The target-action pattern is used in combination with user interface controls as a callback to a user event. Whenever a button is pressed on a target, its action will be called. One such…

We know that a var will create a variable and let will create a constant. Static will create type properties which can be a let or a var, which can be shared between all objects of that specific class. What this means is adding a static keyword to an object’s…

Memory Management is an important aspect when it comes to developing an App. Memory Management in brief There are 2 ways how an iPhone stores data — 1) The disk 2) RAM (Random Access Memory) When your application is running a part of RAM is allocated, where all your instances are stored, this part…