harryworld

# UI framework rules for SwiftUI

1. State Management:
   - Use `@Observable` for reference types holding business logic and app state.  
   - Use `@Bindable` properties within @Observable classes so SwiftUI views can bind directly to them.
   - Avoid `@State` for view model observation, rely on `let model: MyModel` instead.  
   - Pass dependencies via initialisers rather than as global singletons.  
   - Use `@Environment` for app-wide or large-scope states.  
   - `@State` is only for view-local state.
   - Use `@Binding` only if necessary

harryworld

Vanilla SwiftUI

Micro Services

• SwiftUI Microservices by Michael Long
• App architecture Services

SwiftUI know-how

• Deep Inside Views, State and Performance in SwiftUI by Michael Long
• Every SwiftUI protocol explained by FIVE STARS
• Stop using MVVM for SwiftUI
• Preference update multiple times per frame

harryworld

//
//  Regex.swift
//

extension String {
    public var byStrippingFormatCharacters: String {
        var result = self

        // #H1, #H2
        Regex.headerRegex.matches(in: result, options: [], range: NSMakeRange(0, result.count)).forEach {

harryworld

City Guide Website

Summary

City Guide is a navigation map for Art Events and Spaces around the World. User can subscribe

Aim of this Project

Extend City Guide to web-based environment, where event organizers can post events to this platform.

harryworld

    func collectionView(collectionView: NSCollectionView, draggingSession session: NSDraggingSession, willBeginAtPoint screenPoint: NSPoint, forItemsAtIndexPaths indexPaths: Set<NSIndexPath>) {

        if let indexPath = draggingIndexPaths.first,
            item = collectionView.itemAtIndexPath(indexPath) {
            draggingItem = item  // draggingItem is temporary instance variable of NSCollectionViewItem
        }
    }
    
    func collectionView(collectionView: NSCollectionView, draggingSession session: NSDraggingSession, endedAtPoint screenPoint: NSPoint, dragOperation operation: NSDragOperation) {
        draggingItem = nil

harryworld

func animateView() {
  CATransaction.begin()
  
  CATransaction.setCompletionBlock { [unowned self] in
      self.removeFromSuperview()
  }
  
  let rotationAtStart = view.layer?.valueForKeyPath("transform.rotation.x") as? NSNumber
  let rotate = CABasicAnimation(keyPath: "transform.rotation.x")
  rotate.duration = 0.3

harryworld

#if os(iOS)
import Cocoa

public struct HNColor {

    public static var DarkGray: UIColor = UIColor(white: 36/255, alpha: 1)
    public static var DeepGray: UIColor = UIColor(white: 27/255, alpha: 1)
    
}
#endif

harryworld

#if os(OSX)
import Cocoa
#endif
#if os(iOS)
import UIKit
#endif

harryworld

# Uncomment this line to define a global platform for your project
platform :osx, '10.11'
use_frameworks!

target 'AppName' do

end

target 'AppNameTests' do
  

harryworld

//
//  ShiftClickGestureRecognizer.swift
//
//  Created by Harry Ng on 27/1/2016.
//  Copyright © 2016 STAY REAL. All rights reserved.
//

import Cocoa

class ShiftClickGestureRecognizer: NSClickGestureRecognizer {