onevcat

import Foundation

/// A class that keeps a weakly reference for `self` when implementing `onXXX` behaviors.
/// Instead of remembering to keep `self` as weak in a stored closure:
///
/// ```swift
/// // MyClass.swift
/// var onDone: (() -> Void)?
/// func done() {
///     onDone?()

onevcat

import SwiftUI

struct ContentView: View {
    
    @State var offset: CGFloat = 0.0
    @State var previousOffset: CGFloat = 0.0
    
    init() {
        let appearance = UINavigationBarAppearance()

onevcat

用户体验和布局进阶

PokeMaster app 现在已经是一个具有完整功能的 SwiftUI app 了。麻雀虽小，五脏俱全，在这个示例 app 里，我们涉及到了一个一般性的 iOS app 所需要的大部分内容：

• 如何构建内容展示的列表
• 如何构建用户交互的表单
• 如何进行网络请求并把内容展示出来
• 如何响应用户的手势
• 如何在不同页面之间进行导航
• 以及，如何通过一定的架构将所有上面的内容整合起来

onevcat

import Foundation
import Combine

protocol Resumable {
    func resume()
}

extension Subscribers {
    class ResumableSink<Input, Failure: Error>: Subscriber, Cancellable, Resumable {
        let receiveCompletion: (Subscribers.Completion<Failure>) -> Void

onevcat

```swift
actor GiftCache {
  private(set) var cachedGifts: [GiftId: CachedGift] = [:]
  
  // this method would be caller by other parts
  func add(gift: CachedGift) {
    cachedGifts[gift.giftId] = gift
    //...
  }
  

onevcat

#pragma mark - Magic
// Need for supporting orientation when not supported in host app plist.
// Swizzle original -application:supportedInterfaceOrientationsForWindow: to change supported orientation in runtime.
-(void) swizzleSupportedInterfaceOrientationsForWindow
{
    Class applicationDelegateClass = [[UIApplication sharedApplication].delegate class];
    Class sdkClass = [self class];
    
    SEL originalSelector = @selector(application:supportedInterfaceOrientationsForWindow:);
    SEL swizzledSelector = @selector(las_application:supportedInterfaceOrientationsForWindow:);

onevcat

// https://github.com/pointfreeco/swift-composable-architecture/discussions/488#discussioncomment-591715

@propertyWrapper
public struct CoW<T> {
  private final class Ref {
    var val: T
    init(_ v: T) { val = v }
  }
  private var ref: Ref

onevcat

import UIKit
import PlaygroundSupport

struct ToDoItem {
    let id: UUID
    let title: String
    
    init(title: String) {
        self.id = UUID()
        self.title = title

onevcat

protocol P: AnyObject { }
class A: P {}

Runtime.classes(conformTo: P.Type.self) // [MyApp.A]

class Runtime {

    public static func allClasses() -> [AnyClass] {
        let numberOfClasses = Int(objc_getClassList(nil, 0))
        if numberOfClasses > 0 {

onevcat

pkill -f "Jitouch"
sleep 5
nohup ~/Library/PreferencePanes/Jitouch.prefPane/Contents/Resources/Jitouch.app/Contents/MacOS/Jitouch > /dev/null 2>&1 &