In Swift, the do-try-catch statement is used to handle errors that can be thrown by a function or method. It provides a structured way to catch and handle errors in your code. In your codebase, you cannot handle all runtime errors when they come but using try-catch you can handle them without crashing your application. The do-try-catch Syntax The do block is used to wrap code that could throw an error. Inside the do block, you call the function or method that throws an error. The try keyword is used before calling any function or method that may throw an ... Read More

In Swift, you can use KVO to observe changes to an object property by registering an observer for that property. When the property value changes, the observer is notified and can take appropriate actions. In this article, you will see an example of how to implement KVO in Swift. To use KVO in Swift, you need to do the following Mark the property that you want to observe with the @objc dynamic attribute. This attribute tells the Swift compiler to generate Objective-C-compatible code for the property. Register an observer for the property using the addObserver(_:forKeyPath:options:context:) method of the observed ... Read More

In Swift, there are several ways to save local data in an app, depending on the type and size of data you want to save. You can use User Defaults, Property List Serialization, Core Data, etc. In this article, you will learn about User Defaults with some examples. User Defaults In iOS, macOS, and watchOS, a fundamental storage mechanism called UserDefaults enables an app to store relatively small amounts of data, including user preferences or settings. You assign a value to a particular key in a key-value pair system that is used. The value may then be obtained by using ... Read More

In iOS Swift, you can manually deprecate members (properties, methods, and other members) by using the @available attribute with the deprecated argument. @available The @available attribute in Swift is used to specify the availability of a particular piece of code. It can be used to mark a class, function, method, property, or enumeration as available or unavailable for a particular platform, version, or architecture. Here's an example syntax of the @available attribute @available(platform version, *) The platform argument specifies the platform on which the code is available (e.g. iOS, macOS, watchOS, tvOS). The version argument specifies the version of ... Read More

In Swift, there are several ways to create an empty array. All approaches are very easy to create an array. Manytimes, creating an empty array is most common requirement in your apps. You can create empty array of any type. In this article, you will see different ways to construct an empty array. Syntax In Swift, you can create an empty array of a certain type using the following syntax − var arrayName = [Type]() Or you can use this alternate syntax − var arrayName: [Type] = [] Both syntaxes work similarly in Swift. For example, if you ... Read More

In Swift, you can use the UITapGestureRecognizer class to add a tap gesture on view programmatically. This class provides you with different properties and methods to enable a tap gesture. In this article, you will learn how to add a tap gesture with an example. UITapGestureRecognizer class UITapGestureRecognizer is a built-in class in the UIKit framework that recognizes a tap gesture on a view. A tap gesture is a quick touch with a single finger or multiple fingers on the screen. UITapGestureRecognizer recognizes taps of a certain number of fingers, taps a certain number of times, and a combination of ... Read More

Sorting a list of string names is a common task in programming, and the LINQ OrderBy() method in C# provides an easy and efficient way to do so. In this article, we will walk you through a C# program to sort a list of string names using the LINQ OrderBy() method. What is LINQ OrderBy() Method? The LINQ OrderBy() method is used to sort the elements of a sequence in ascending or descending order based on one or more keys. The keys can be simple properties or complex expressions that return a value based on one or more properties of ... Read More

Sorting a list of integers is a common task in programming, and the LINQ OrderBy() method in C# provides an easy and efficient way to do so. In this article, we'll walk you through a C# program to sort a list of integers using the LINQ OrderBy() method. What is LINQ OrderBy() Method? The LINQ OrderBy() method is used to sort the elements of a sequence in ascending or descending order based on one or more keys. The keys can be simple properties or complex expressions that return a value based on one or more properties of the objects in ... Read More

In many software development projects, there comes a point where it becomes necessary to sort a list of objects based on one or more properties of the objects. In C#, the LINQ (Language Integrated Query) library provides a powerful and easy-to-use way to sort lists of objects based on one or more criteria. In this tutorial, we will demonstrate how to sort a list of Employee objects based on their salary using LINQ. Steps Create an Employee class with properties for Name, Salary, and Department. Create a List of Employee objects and populate it with some data. Use LINQ ... Read More

In C#, LINQ (Language Integrated Query) is a powerful tool that enables you to easily sort, filter, and manipulate data. In this article, we'll demonstrate how to use LINQ to sort a list of employees based on their salary in descending order and department in which they work. Sorting a List of Employees Based on Salary in Descending Order and Whose Department is XYZ using LINQ − To sort a list of employees based on their salary in descending order and department using LINQ, you can follow the steps below − Create a class to represent an Employee − ... Read More