swift5

问题 I want a @Published variable to be persisted, so that it's the same every time when I relaunch my app. I want to use both the @UserDefault and @Published property wrappers on one variable. For example I need a ' @PublishedUserDefault var isLogedIn '. I have the following propertyWrapper import Foundation @propertyWrapper struct UserDefault<T> { let key: String let defaultValue: T init(_ key: String, defaultValue: T) { self.key = key self.defaultValue = defaultValue } var wrappedValue: T { get

问题 After migrating the project to swift 5, I'm getting a lot of errors such as Expression implicitly coerced from 'UIButton?' to 'Any' I'm not sure what's causing this. One example where this is happening(there are a bunch) is when I'm setting the view.accessibilityElements. The array is supposed to contain : [Any]?... Any idea what's causing this? Here is an example: @IBOutlet weak var shareButton: UIButton! @IBOutlet weak var shareTitleLabel: UILabel! view.accessibilityElements = [shareButton,

问题 After migrating the project to swift 5, I'm getting a lot of errors such as Expression implicitly coerced from 'UIButton?' to 'Any' I'm not sure what's causing this. One example where this is happening(there are a bunch) is when I'm setting the view.accessibilityElements. The array is supposed to contain : [Any]?... Any idea what's causing this? Here is an example: @IBOutlet weak var shareButton: UIButton! @IBOutlet weak var shareTitleLabel: UILabel! view.accessibilityElements = [shareButton,

问题 After migrating the project to swift 5, I'm getting a lot of errors such as Expression implicitly coerced from 'UIButton?' to 'Any' I'm not sure what's causing this. One example where this is happening(there are a bunch) is when I'm setting the view.accessibilityElements. The array is supposed to contain : [Any]?... Any idea what's causing this? Here is an example: @IBOutlet weak var shareButton: UIButton! @IBOutlet weak var shareTitleLabel: UILabel! view.accessibilityElements = [shareButton,

问题 I am following along with the session from WWDC2019 here : https://developer.apple.com/videos/play/wwdc2019/216/ I have the following code working for creating a TabbedView using SwiftUI : //Section1 | ContentView (mine)--------------------------- import SwiftUI struct ContentView : View { var body: some View { NavigationView { TabbedView(selection: .constant(1)) { PlaceForm().tabItemLabel(Text("Tab1")).tag(1) FavoritesForm().tabItemLabel(Text("Tab2")).tag(2) } } } } #if DEBUG struct

问题 I want to put the image to the right in an ActionSheet as seen on the AppStore. I know how to add an image and change the titleText style but I am unable to figure out how to change the positions of these two. Third party libraries are not appreciated. Thanks! Screenshot - AppStore 回答1: Updated to swift 4.2 and added images. Go through below link for more info. How to customize UIAlertController with UITableView or is there any default control available like this UI in Pages app? import

问题 I am parsing Json with Alamofire and SwiftyJSON. I can see all json data from url. Everything is clear in my console but I need to append some values in string arrays. As you can see json values. I create 3 string arrays. I need to append to arrays teams, player names and trophies. I will list team and player name in tableview. I need help to append values in arrays // json values in console [ { "id" : 1, "team" : "Liverpool", "players" : [ { "id" : 2, "name" : "Alisson", "position" : "Goal

问题 This code using AVPlayer works only on Playground import AVFoundation var player = AVPlayer() let playerItem = AVPlayerItem(url: URL(string: "https://www.soundhelix.com/examples/mp3/SoundHelix-Song-1.mp3")!) player = AVPlayer(playerItem: playerItem) player.play() When I tried to run it on my SwiftUI App on my physical device, using this code: Button(action:{ var player = AVPlayer() let playerItem = AVPlayerItem(url: URL(string: "https://www.soundhelix.com/examples/mp3/SoundHelix-Song-1.mp3")!

问题 I am stumbling upon an issue with concurrency and arrays in Swift 5. To reproduce the issue I have simplified my code to the following fragment: import Dispatch let group = DispatchGroup() let queue = DispatchQueue( label: "Concurrent threads", qos: .userInitiated, attributes: .concurrent ) let threadCount = 4 let size = 1_000 var pixels = [SIMD3<Float>]( repeating: .init(repeating: 0), count: threadCount*size ) for thread in 0..<threadCount { queue.async(group: group) { for number in thread

问题 This code used to be fine (in the sense that the compiler didn't complain): extension OutputStream { func write(_ data: Data) -> Int { return data.withUnsafeBytes { pointer in return self.write(pointer, maxLength: data.count) } } } Since Swift 5.0, this produces a warning: Warning: 'withUnsafeBytes' is deprecated: use withUnsafeBytes<R>(_: (UnsafeRawBufferPointer) throws -> R) rethrows -> R instead I tried using the proposed method but I can't seem to wrangle the UnsafeRawBufferPointer into