IanKeen

struct User: Equatable {
    var firstName: String
    var lastName: String
}

@main
struct MyApp: App {
    @State var value = User(firstName: "", lastName: "")
    @State var showEdit = false

noahsark769

import SwiftUI

// Note: There are some issues with using these modifiers inside of ButtonStyles on macOS. Please see https://twitter.com/noahsark769/status/1288256379640139776?s=20 for more info.

struct ConditionalContent<TrueContent: View, FalseContent: View>: View {
    let value: Bool
    let trueContent: () -> TrueContent
    let falseContent: () -> FalseContent

    @ViewBuilder var body: some View {

chriseidhof

import SwiftUI

struct SizeKey: PreferenceKey {
    static func reduce(value: inout CGSize?, nextValue: () -> CGSize?) {
        value = value ?? nextValue()
    }
}
struct ContentView: View {
    @State var width: CGFloat? = nil
    var body: some View {

mattgallagher

//
//  AppDelegate.swift
//  SwiftUITestApp
//
//  Created by Matt Gallagher on 4/6/24.
//  Copyright © 2019 Matt Gallagher. All rights reserved.
//

import Cocoa
import SwiftUI

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)

AliSoftware

/*:
 This is a concept re-implementation of the @Binding and @State property wrappers from SwiftUI

 The only purpose of this code is to implement those wrappers myself
   just to understand how they work internally and why they are needed,

 ⚠️ This is not supposed to be a reference implementation nor cover all
      subtleties of the real Binding and State types.
    The only purpose of this playground is to show how re-implementing
      them myself has helped me understand the whole thing better

chriseidhof

//
//  ContentView.swift
//  TestingMoreSwiftUI
//
//  Created by Chris Eidhof on 04.06.19.
//  Copyright © 2019 Chris Eidhof. All rights reserved.
//

import SwiftUI
import Combine

Shehryar

#!/bin/sh

if [ -z "$XCODE_VERSION_CORRECT" ]
then
    export SUDO_ASKPASS="${PROJECT_DIR}/../scripts/askpass.sh"
fi

UNIVERSAL_OUTPUTFOLDER=${BUILD_DIR}/${CONFIGURATION}-universal

# make sure the output directory exists

tclementdev

libdispatch efficiency tips

The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).

My take-aways are:

• You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.

• Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse

smileyborg

// UICollectionView Objective-C example

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
        
    NSIndexPath *selectedIndexPath = [[self.collectionView indexPathsForSelectedItems] firstObject];
    if (selectedIndexPath != nil) {
        id<UIViewControllerTransitionCoordinator> coordinator = self.transitionCoordinator;
        if (coordinator != nil) {
            [coordinator animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext> context) {