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getPreferredLanguages

Parses the Accept-Language header's value in an array of language directives.

Usage

const acceptLanguageValue = 'pt-BR, en;q=0.9, fr;q=0.8, it;q=0.7, *;q=0.5'

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useMatchMedia hook

Allow to obtain match responses of given media query list items.

Details

This hook relies on window.matchMedia to provide precise updates when some media query matches or not its requirements. It will also handle and dispose event listeners properly and avoid uncessary re-renders.

API

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Maybe type for TypeScript

Maybe is a type to help to work with nullable or undefined types more pleasurable. Very inspired by Haskell and some bits of Rust's pattern matching.

API

Types

Maybe<T>

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BindingUnwrapperView

⚠️ WARNING ⚠️

This concept still not working and I don't have a clue (so far) why it do not compile because the only error I get is:

failed to produce diagnostic for expression; please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project

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DebugView Modifier

Extends View's protocol including some additional modifiers to help debugging SwiftUI

Example

import SwiftUI

struct ContentView: View {

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Cache

Allows to store values in memory, powered by system NSCache (but for value types too). The Cache class is full based in a John Sundell tutorial (check out at See Also section).

Also, there's a Environment modifier to allow share cache between views in same context. It would be helpful in situations where Cache is initialized just once in runtime.

And remember, Cache is only cache-memory, so use it wisely.

For file cache based, I trully recommend reading the article mentioned at See Also to understand and implement file-based cache.

jancassio

LadyBug

LadyBug is cute and log messages along app execution. Behind the scenes LadyBug uses OSLog to perform log messages and store log in app archive according by level.

level	persisted	performance
debug	❌	faster
info	❓ (only during log collect)	faster (out of log collect), lower (during log collect)
notice	✅	lower
error	✅	lower

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FontFamily Enumerated (Swift)

Helps to quick enumarate font faces by strong typed enumerators.

Usage

enum Arial: String, FontFamily {
  case regular = "Arial-Regular"
 case bold = "Arial-Bold"

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StatefulPreview.swift

What's it?

StatefulPreview is a simple struct wrapped in a PreviewProvider extension that enables stateful previews for SwiftUI views.

Why?

Fields wrapped in @Binding annotation, are not easy to preview as stateful value. It's possible to wrap a value using .constant utilty but it will not allow to modify the value.

jancassio

//
//  String+Localized.swift
//
//  Created by Jan Cássio on 2021/03/27.
//  Copyright © 2021 Jan Cassio. All rights reserved.
//

import Foundation

extension String {