In this article you’ll learn what you need to start unit testing your Swift code in Xcode. It is supposed that the project is not having any test target created during it’s creation. Adding unit test target to your Xcode project To unit test your app, your Xcode project must have a unit test target.… Read More »
SwiftUI provides the symbolEffect() modifier to add built-in animation effects for SF Symbols and produce a real touch of delight with almost no effort. For example, we could animate a dog icon up and down with a gentle bounce whenever a button is pressed. You could also try .pulse to animate the opacity, but where things get really clever is when… Read More »
In latest iOS versions ( ios 17 onwards) we can directly put stroke and fill shapes just by adding modifiers one after another as shown below. It works with multiple strokes of various sizes as shown below. In older versions of iOS ( iOS 16 ) SwiftUI provides the fill(), stroke(), and strokeBorder() modifiers for adjusting the way we… Read More »
How to show alerts in swiftUI-Tutorial In our application we show alerts to users to provide some kind of information about the action they have taken. SwiftUI provides simple and direct way of showing alert to users. With iOS 15 it became even easier. In this tutorial we will show you how to setup alerts… Read More »
In swiftUI, apple doesn’t provide any dedicated background image or color modifier. It lets us add any kind of background view using its background() modifier. For example, this creates a text view with a large font, then places a 100×100 image behind it. However, it doesn’t need to be an image all the time. For example, this… Read More »
In swiftUI we can render colors in different ways, one of them is gradient. In the latest versions of swiftUI it can be done easily. If you are targeting iOS 16 or later you can easily generate gradient simply by adding .gradient() to the color as shown below. To support iOS versions prior to 16,… Read More »
Swift’s Text views usually show static, unselectable text by default. Therefore quite often users cannot select the text and copy it, but now you can change that using the .textSelection() modifier with the .enable value. For example, this makes some text the user can select, and some the user cannot: Once the text got selected,… Read More »
There will be situations where you have to expose your Swift class to React Native. To do this, you need to use some Obj-C Macros available in React Native. To use these Obj-C Macros, you need a new Obj-C file: You have to import RCTBridgeModule, so that you can use the Macros to bridge the native… Read More »
Like many other text UI’s SwiftUI’s Text wraps across multiple lines, they align to their leading edge by default. You can change that behavior, by using swiftUI’s ‘multilineTextAlignment()’ modifier to specify an alternative like .center, .trailing etc. For example, this will center several lines of text as they wrap across lines: Let’s use a picker… Read More »
The timeline view in Swift is a bit different, because it doesn’t have a display of its own. The main idea behind timeline view is that you can provide some kind of schedule and based on the schedule the view is going to get date and you can pass it to analog view or digital… Read More »
There are two main approaches to implementing pull-to-refresh functionality in SwiftUI, depending on your SwiftUI version and desired level of customization: 1. Using the built-in refreshable modifier (iOS 16+) If you’re targeting iOS 16 and above, SwiftUI offers a built-in refreshable modifier that simplifies pull-to-refresh functionality for List and ScrollView. Here’s how to use it:… Read More »
AsyncImage is a component introduced in SwiftUI to handle the loading and displaying of remote images asynchronously. It simplifies the process of fetching images from the web, handling the loading state, and displaying a placeholder until the image is ready. Here’s a detailed breakdown of how AsyncImage works, its customisation options, and usage examples. Basic… Read More »
Higher-order functions in Swift are functions that take other functions as parameters or return functions as output. They enable a functional programming style by allowing you to compose functions, pass behavior as arguments, and manipulate collections with concise and expressive code. Here are some common higher-order functions in Swift with examples: map(_:): filter(_:): reduce(_:combine:): sorted(by:):… Read More »
In Swift, inout is a keyword used to indicate that a parameter is passed by reference and can be modified inside a function, affecting the original value outside the function. This allows a function to modify the value of the parameter and have those changes reflected in the calling scope. Here’s an example to illustrate… Read More »