kean

enum APIEnvironment: String, CaseIterable {
    case dev
    case test
    case stage
    case prod
}

struct ContentView: View {
    @State private var selection: APIEnvironment? = env
    

miguelmota

lsblk
sudo umount /dev/sd<?><?>  
xzcat ~/Downloads/linux.img.xz | sudo dd of=/dev/sd<?> conv=fdatasync status=progress

atomicbird

//
//  NSPersistentContainer+extension.swift
//  CDMoveDemo
//
//  Created by Tom Harrington on 5/12/20.
//  Copyright © 2020 Atomic Bird LLC. All rights reserved.
//

import Foundation
import CoreData

mecid

//
//  PagerView.swift
//
//  Created by Majid Jabrayilov on 12/5/19.
//  Copyright © 2019 Majid Jabrayilov. All rights reserved.
//
import SwiftUI

struct PagerView<Content: View>: View {
    let pageCount: Int

scottmatthewman

import SwiftUI
import Combine

struct AdaptsToSoftwareKeyboard: ViewModifier {
  @State var currentHeight: CGFloat = 0

  func body(content: Content) -> some View {
    content
      .padding(.bottom, currentHeight)
      .edgesIgnoringSafeArea(.bottom)

josephlord

//
//  FetchedResultsControllerPublisher.swift
//  ListsModel
//
//  Created by Joseph Lord on 09/06/2019.
//  Copyright © 2019 Joseph Lord. All rights reserved.
//

import Foundation
import Combine

gokselkoksal

public class Channel<Value> {
    
    private class Subscription {
        
        weak var object: AnyObject?
        private let notifyBlock: (Value) -> Void
        private let queue: DispatchQueue
        
        var isValid: Bool {
            return object != nil

morishin

rcholic

1. The Layer Tree

Core Animation's original name is Layer Kit

Core Animation is a compositing engine; its job is to compose different pieces of visual content on the screen, and to do so as fast as possible. The content in question is divided into individual layers stored in a hierarchy known as the layer tree. This tree forms the underpinning for all of UIKit, and for everything that you see on the screen in an iOS application.

In UIView, tasks such as rendering, layout and animation are all managed by a Core Animation class called CALayer. The only major feature of UIView that isn’t handled by CALayer is user interaction.

There are four hierarchies, each performing a different role:

• view hierarchy
• layer tree

policante

extension UIView {

  func startShimmering(){
        let light = UIColor.white.cgColor
        let alpha = UIColor.white.withAlphaComponent(0.7).cgColor
        
        let gradient = CAGradientLayer()
        gradient.colors = [alpha, light, alpha, alpha, light, alpha]
        gradient.frame = CGRect(x: -self.bounds.size.width, y: 0, width: 3 * self.bounds.size.width, height: self.bounds.size.height)
        gradient.startPoint = CGPoint(x: 0.0, y: 0.5)