In iOS development, there are several techniques available to achieve concurrency, You will see different approaches in this article along with some examples. You will learn about Grand Central Dispatch and NSOperationQueue techniques with examples. What is concurrency in iOS? In iOS applications, you can adopt the ability to run the multiple tasks or threads simultaneously by the operating system. In iOS, primarily you achieve concurrency through the use of Grand Central Dispatch (GCD) and NSOperationQueue Developers can prevent blocking the main thread, which updates the user interface, by leveraging concurrency. Instead, they can carry out background activities ... Read More

In this article, you will learn about both the pattern in the Swift language. Also, you will see what are advantages of using these patterns. You will see examples of how you can adopt these patterns in your projects. Using the adapter pattern, you can design a system that allows two different interfaces to work together or communicate between them. You can implement this design pattern with the class or structure by conforming to a certain protocol. Then, you can use an instance of that class or struct to interact with an object that conforms to a different protocol. Using ... Read More

In this article, you are going to learn how to use isKindOfClass in swift with some different examples. It is required many times you need to check the type of a class to perform specific code accordingly. What is “isKindOfClass”? The isKind(of:) method can be used for checking the object type. You can check if an object is an instance of a given type. You can check it for a class or subclass depending on the boolean value returned. In Swift 5, the isKind(of:) method has been replaced by the is an operator and the is a keyword. The is ... Read More

In Swift, you can use the is keyword to test the class type of an object in a switch statement. Also, you will some examples of how to typecast an object to the expected type. Here is an example to test primitive data types In this example, you will check the type for primitive data types such as String, Int, Double, etc. You can use the switch statement to check multiple conditions like the below −Example import Foundation func checkType(_ value: Any) { switch value { case is String: print("The value ... Read More

There are several ways to remove the last character from a string. Let's see some examples of different methods. We will use the below approaches to remove the character from a string − Using the dropLast() method Using the substring(to:) method Using the removeLast() method Using the prefix(upTo:) method Using an array and removeLast() method Using the remove(at:) method Using the dropLast() method In Swift, you can remove the last character from a string by using the String method dropLast(). Here is an example −Example  import Foundation let originalString = "Tutorials Point!" let modifiedString = originalString.dropLast() print("Original String: ... Read More

In this article, we will see some examples of how we can read the JSON file using JSONSerialization and JSONDecoder classes. Nowadays, these classes are used in most iOS applications to work with JSON files. You can use the JSONSerialization class to read the JSON file in the Swift language. In order to read a json file, first you will require to convert it into a string or data object. After that, you can pass the string or data object to JSONSerialization class to convert it into a dictionary or array object. JSONSerialization The Foundation framework for iOS and macOS ... Read More

In Swift, you can read and write a string from a text file using the String(contentsOfFile:) and write(toFile:atomically:encoding:) methods of the String class. You will see some examples of file reading and writing in Swift. String(contentsOfFile:) A class method for creating a string from a file's content is provided by the String class. This method is an initializer where the path to the file must be given. For instance, you can read the contents of local files by passing the path to the main bundle. A new string containing the file's content is returned by this procedure. Keep in mind ... Read More

You can use the reactive programming frameworks in iOS application development. To use it, the ReactiveCocoa and RxSwift frameworks are the best options to implement the features. Both frameworks provide a way to handle asynchronous events and data streams and are similar in many ways. What is ReactiveCocoa? You can use the ReactiveCocoa framework to adopt the reactive programming in your iOS, macOS, and watchOS platforms. Using reactive programming, you can handle asynchronous events and data streams easily. This framework has been built on top of Objective-C language. This framework provides you with some tools to work with streams of ... Read More

What are Storyboards in Swift? In Swift, the Storyboard is a tool that provides you with a user interface to design the UIs of your application. It provides you with a visual representation of all the screens and the connections between them. You can connect all the layout components in your controller classes easily using Storyboard. What is instantiateViewController(withIdentifier:)? You can set the initial view controller programmatically using the instantiateViewController(withIdentifier:) method of the UIStoryboard class. This method takes an identifier string as a parameter, which should match the storyboard ID of the view controller you want to set as the ... Read More

In Swift, there are different types of integers − Int − A signed integer with a size equal to the native word size of the computer (32 or 64 bits depending on the platform). Signed integer types with a range of bit sizes include Int8, Int16, Int32, and Int64. UInt − An unsigned integer type with the same native word size as the hardware (32 or 64 bits depending on the platform). Unsigned integer types with designated bit sizes are UInt8, UInt16, UInt32, and UInt64. Here are some examples of using each of the integer types in Swift ... Read More