eonil

import SwiftUI
import UIKit

struct HPSFNavigationStack<SliceID: Hashable, Content: View>: View {
    private var spec: Spec
    enum Action {
        case userNavigation([SliceID])
    }
    init(slices: [SliceID], content: @escaping (SliceID) -> Content) {
        spec = Spec(slices: slices, content: content, action: noop)

eonil

• 101_hd.mov
• 101_sd.mov
• 102_hd_platforms_state_of_the_union.mov
• 102_sd_platforms_state_of_the_union.mov
• 102_platforms_state_of_the_union.pdf
• 103_hd_apple_design_awards.mov
• 103_sd_apple_design_awards.mov
• [ 201_hd_advanced_

eonil

WWDC                                      2007  2008  2009
2010 2011 2012 2013 2014 2015 

eonil

Cocoa Note (including AppKit)

• NSLayoutManager.setTemporaryAttributes(:forCharacterRange:) is far faster than NSTextStorage.setAttributes(:range:). On My iMac, former took about 2 seconds, and latter took about 17 seconds in optimised build of test suit.

• Anyway, modifying NSTextStorage also took 2 seconds when wrapped by beginEditing/endEditing pair. So this performance drop is mainly due to inefficient layout refresh. You will get same performance

eonil

cd TestApp1

DEST="platform=iOS Simulator,name=iPhone 8,OS=13.6"
SIGNFLAGS="CODE_SIGN_IDENTITY= CODE_SIGNING_REQUIRED=NO CODE_SIGNING_ALLOWED=NO"

xcodebuild clean build test -scheme TestApp1 -sdk iphonesimulator -destination "$DEST" $SIGNFLAGS
~                                                                               
~                                                                               
~                            

eonil

An Opinion about How to Implement UI Apps for Apple Frameworks

Eonil, 2020.

This explains how I organize code of interactive programs.

Overview

eonil

import Foundation
import Combine

final class Task<I,O> {
    let control = PassthroughSubject<Int,Error>()
    let report = PassthroughSubject<Int,Error>()
    init() {
        let i = Channel(control)
        let o = Channel(report)
        DispatchQueue.global().async { [i,o] in

eonil

UIKit Note

Autolayout

• If you want self-sizing view by its subviews, just do not set its sizing constraint. Then it will become the

eonil

//
//  ContentView.swift
//  SwiftUIWithNSWindowWithoutTitlebar1
//
//  Created by Henry Hathaway on 1/9/20.
//  Copyright © 2020 Eonil. All rights reserved.
//

import SwiftUI

eonil

extension RelPath: Comparable {
    /// Sorts by lexicographical topological order.
    public static func < (_ a:RelPath, _ b:RelPath) -> Bool {
        let c = Swift.min(a.count, b.count)
        for i in 0..<c {
            if a[i] < b[i] { return true }
            if a[i] > b[i] { return false }
        }
        return a.count < b.count
    }