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Mobile Development

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.

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!

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.

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.

Give your UIViews and UIButtons some rounded edges and a shadow!

Give your UIViews and UIButtons some rounded edges and a shadow!

Somehow, making a button rounded, and then adding a shadow to it, seems to be more difficult than it should. Here's how to do it in Swift!

Memoize your API calls in Swift using functions' scopes!

Memoize your API calls in Swift using functions' scopes!

Improve your iOS app's performance and battery usage by not repeating expensive computation and network calls, using memoization, in Swift!