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You can use the Timer class in Swift to create a timer that can execute a method repeatedly at a specified time interval. You can implement the timer to solve different problems. You can schedule repeatable and non-repeatable timers in Swift. Timers in Swift can be used to perform a variety of tasks, such as − The process of carrying out a specific action or chunk of code at specified intervals of time, such as updating a display or changing a label's content, or performing any other UI action. Sending a reminder or establishing a background activity that will ... Read More
In Swift, you can make a weak protocol reference by using the weak keyword when declaring the variable or property that holds the reference to the protocol. The weak reference helps you to avoid the retain cycle creation. What is a weak protocol reference? A weak protocol reference in Swift is a technique for defining a protocol that a class can use without starting a strong reference cycle. When two objects maintain strong references to one another, preventing either object from being deallocated, this is known as a strong reference cycle. One of the objects is able to deallocate the ... Read More
In Swift, you can define a base class using the class keyword. The base class can be used to implement common properties using a single class. You can define the properties and methods in a class like the one below − class MyBaseClass { // properties and methods go here } A subclass is also defined by the class keyword. In a similar way, you can define the properties and methods in the class. To make it a subclass, you have to mention the parent class followed by the parent class name after the colon like ... Read More
In this article, you will learn various ways to generate random alphanumeric strings in the Swift language. Here we are going to use the following 3 methods to generate a random alphanumeric string in swift − Using the RandomNumberGenerator protocol Using the Random() function Using higher-order functions Using the RandomNumberGenerator protocol Swift 5 comes with a random() function that is added to the Foundation framework. We will use the RandomNumberGenerator protocol as the random() function is a part of this protocol.Example The following example demonstrates on how to use the random() function to generate a random alphanumeric ... Read More
In Swift, there are two different concepts i.e. protocols and superclasses are used to build the application by writing reusable and flexible code. They both are different concepts but somehow they have some common features. You can define the protocol with methods and properties to achieve any particular feature. In the same way, you can create a class with methods and properties to hold some information. Swift provides flexibility in that class, structure, and enums can conform to a protocol. A superclass is also a class type. It can be inherited from other classes in a similar way. In this ... Read More
In this article, you will learn about how to create a button prograticamtilly in the Swift language. There are different ways to create a button object programmatically in iOS. Let's explore some of them with an example. We will see the following ways to create a button − Step 1 − In this step, we will create a button object and customize it later when required. Step 2 − In this step, we will create a button object using a lazy keyword. Step 3 − In this step, we will create a button object and set the frame later. ... Read More
In Swift, you can use the layer property of a UIButton to set the corner radius of its border. You can use the layer (CALayer) property to apply the border width and color to the button. Also, the same property provides access to the cornerRadius property to make the button rounded. We will use the following steps to make a button rounded with a border Step 1 − In this step, create a button object with basic customization. Step 2 − In this step, add a border and corner radius to the button. Step 3 − In this step, make ... Read More
To change the text of a UIButton in Swift, you can use the setTitle() method of the button. This method takes an argument to set the button title for a particular state. Generally, we used the normal button state. We will change the text of the button programmatically by following the below steps − Step 1 − In this step, we will create two buttons (login and T&C) and add basic customization. Step 2 − In this step, we will change the text of the login button. Step 3 − In this step, we will change the text of the ... Read More
This article explains how to go back from a view controller programmatically using Swift language. You will see an example of using the popViewController method to go back to the previous controller. What is ViewController in Swift? In Swift, a UIViewController manages the interaction between the user interface and the logic data. It is responsible for handling user interactions with the user interface. The class is part of the UIKit framework and provides some functions and properties along with a life cycle. This class is the most common class used in iOS development. To go back to a previous view ... Read More
In this article, you will learn about how you can hide the keyboard while editing text in the UITextField. In this example, you will hide the keyboard by pressing the return button on the keyboard. In the Swift language, UITextField class provides us with some delegate methods. They called on different actions or events. We will implement one of the delegate methods to hide the keyboard. Also, you will see how to change the return type if required. In this example, we will hide the keyboard in UITextField to enter an email address by following the below steps − ... Read More