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Swift Programming

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

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!

Getting the last two values from an RxSwift Observable

Getting the last two values from an RxSwift Observable

I really can't remember why, but at some point I needed to get a RxSwift Observable's last two values, to compare them and decide what to do next.

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

Add a bottom divider to your SwiftUI view!

Add a bottom divider to your SwiftUI view!

Where we learn to look around thoroughly before blindly trusting strangers.