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In Swift, working with JSON objects is very easy with the JSONDecoder class. It is always necessary to create model classes or structs with the Codable protocol. One single mistake leads you to fail to decode the complete JSON object. Let's explore some examples to understand when this failure might occur and how you can handle it in Swift. What is the JSONDecoder class? The JSONDecoder class is then used to parse the JSON data from the file into an instance of the given Type either a class or structure. The decode(_:from:) method is used to deserialize the JSON data, ... Read More
We can define a subclass that is inherited from a superclass in the Swift language, That means you can override its properties and methods using the override keyword. However, you cannot override the properties with a different type in the subclass. By default, the subclass must override the properties of the same type as the superclass type. For example, let's say you have a Person class with name and age properties of type String and Double − class Person { let name: String let age: Double ... Read More
URL encoding is an essential part of iOS app development. Many times, you will need to encode the URL to communicate with servers. Let's look at some examples of how you can encode an URL in Swift and Objective-C. URL Encoding in Swift In Swift, you can use the addingPercentEncoding(withAllowedCharacters:) method for URL encoding. URL Encoding in Objective-C In Objective-C, you can use the stringByAddingPercentEncodingWithAllowedCharacters method for URL encoding. Encode a URL in Objective-C In Objective-C, you can encode a URL string using the stringByAddingPercentEncodingWithAllowedCharacters: method of the NSString class. Here's an example NSString *stringToEncode = @"https://www.exampleserver.com/complete path with spaces"; ... Read More
In Swift, you can create an array using the ArraySlice type. The following examples will show how to use the ArraySlice type. You can create an extension as well to define the subscript method. Example 1 In the following example, we create an array of numbers with values from 0 to 9 and then create a range of indices from startIndex to endIndex (exclusive). Using this range we can generate an ArraySlice of the original array. In the end, we will convert the ArraySlice to an array using the Array initializer and print the result. import Foundation let numbers = ... Read More
In Swift, there are several ways to implement type constraints on types. We will use some common approaches like the where clause, protocol, etc. Generics provide lots of flexibility to write better and more secure code in Swift. We can apply generics to collections, custom types, etc. One of them is generic type constraints. Using type constraints, you can make your generic code behave that matches a certain set of constraints whatever you define. Swift provides multiple ways to specify type constraints on generic type parameters. Type constraints using the "where" clause The "where" clause in Swift is a highly ... Read More
Kubernetes is an open-source container orchestration platform that allows organizations to deploy, manage, and scale containerized applications. With its widespread adoption, Kubernetes security has become a crucial concern for businesses to ensure safety of their workloads. This article highlights six Kubernetes security best practices that can help secure your workloads. Implement Role-Based Access Control (RBAC) One of critical security features of Kubernetes is Role-Based Access Control (RBAC), which restricts users' access to Kubernetes API based on their roles and responsibilities. With RBAC, organizations can define roles for users, groups, or service accounts and assign specific permissions to perform actions within ... Read More
If you're a Linux user, chances are you rely on Firefox as your go-to web browser. Firefox is a fast and reliable browser, but it can still suffer from slow performance if you're not careful. Luckily, there are several easy ways to speed up Firefox on your Linux desktop. Here are five ways to do it − Install uBlock Origin One of easiest ways to speed up Firefox on Linux is by installing uBlock Origin. This is an open-source browser extension that blocks ads, trackers, and malware. By blocking these unwanted elements, uBlock Origin can significantly speed up Firefox's loading ... Read More
If you are a Debian user, you might have encountered "ifconfig command not found" error while trying to check your network interface configurations. This error occurs when ifconfig command, which is used to configure and display network interfaces, is not installed on your Debian system or package that contains it is not properly configured. Fortunately, there are several ways to fix this error and get back to managing your network interfaces. In this article, we will discuss five ways to fix ifconfig command not found error on Debian. Install Net-tools Package The first and easiest way to fix ifconfig command ... Read More
Have you ever encountered a binary command and wondered where it's located on your file system? A binary command is a compiled program that you can run in your terminal. It's easy to get lost in maze of directories on your computer, but fear not, we have compiled five ways to find a binary command's description and location on your file system. Use "which" Command The "which" command is a simple but effective way to locate a binary command's location. It will tell you full path of command you are looking for. Simply open up your terminal and type − ... Read More
In the iOS applications, the UIImageView class does not provide in-build support to make it clickable like other components e.g. UIButton. In order to make UIImageView clickable, you can add a UITapGestureRecognizer to the image view. Remember that, by default, UIImageView does not take any interaction from the user. To make it interactable, set true to the isUserInteractionEnabled property. In this article, you will learn how you can add a tag gesture to the image view in Swift. To add a tap gesture, we will follow these steps − Step 1 - Create an Image View let profileImageView = ... Read More