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iOS Development

Conditionally debounce value updates, in Swift

Conditionally debounce value updates, in Swift

Improve your iOS app's performance and enhance your users' experience by learning how to conditionally debounce events. Also, it's a panacea that solves everything. Ok, almost everything. Depending on how you look at it.

Convert between image (pixels) and scaleAspectFit UIImageView coordinates like a champ!

Convert between image (pixels) and scaleAspectFit UIImageView coordinates like a champ!

When working with images in iOS, it's sometimes necessary to convert between an image's pixel coordinates and the coordinates of the UIImageView that displays the image. Here's how to do it.

Preserve your images' transparency when saving and sharing them, in Swift

Preserve your images' transparency when saving and sharing them, in Swift

Loosing your rounded corners or transparent background when saving an image to the user's photo library or sharing it with UIActivityViewController? It's because it's be turned into a JPEG. Here's how to solve that.

Build OpenCV Contrib as a .xcframework, for iOS, on a M1

Build OpenCV Contrib as a .xcframework, for iOS, on a M1

We needed an OpenCV Contrib module in an iOS app, using Swift Package Manager. I thought the hardest part would be using OpenCV. How wrong I was.

Add a height-flexible placeholder to your UITextView

Add a height-flexible placeholder to your UITextView

Once you have tasted SwiftUI, this kind of UIKit lacking makes you wish you could refactor a client's whole codebase at a snap from your fingers. At least the UI side of it. But, alas, there is no magic spell for that. Yet. What kind of lacking? UITextView doesn't have

Make your UIButtons come to life

Make your UIButtons come to life

After giving our UIViews' both shadows AND rounded corners, today we will learn how to animate UIButtons and make them visually respond to our users' touch!

Solve most of your Xcode problems through Cargo Cult

Solve most of your Xcode problems through Cargo Cult

If you are an iOS or macOS developper, you probably work with Xcode. And if you work with Xcode, you've most probably had some weird times where, suddenly, things just stopped working. Here's how to solve that