I have a table to which I've added a refreshControl and when I pull down the table to refresh the data, I reset the array that feeds the table with data and then immediately request new data through an API call. Until now, I have used completion handlers and protocols to get the data into the table view but I want to move the logic to async/await because of the complexity needed by the network calls and the pyramid of nested closures. Populating the view in viewDidLoad works fine but with pullToRefresh selector I get an error: Thread 1: EXC_BAD_ACCESS (code=1, address=0xbcf917df8160) override func viewDidLoad() {     super.viewDidLoad()     setupView()     setupTableView()     setupTableRefreshControl()     Task {       await getBalances() //async network call       myTable.reloadData()     }   }    func setupTableRefreshControl() {     myTable.refreshControl = UIRefreshControl()     myTable.refreshControl?.addTarget(self, action: #selector(didPullToRefresh), for: .valueChanged)   } Code that crashes app:    @objc func didPullToRefresh() async {     balance.reset() // reset array to []     Task {       await getBalances() //async network call       myTable.reloadData()     }   }

In the Meet AsyncSequence talk, there's a very cool use case that's shown in one of the slides - the new notifications property on NotificationCenter is an async sequence and the code sample does something like: let notification = await center.notifications(named: ....).first { ... } This seems really intriguing and useful to me but I had a few questions about the details of how this works: What is the type of notification in this snippet? A Task? Where would I store this value? What context should this be invoked in, especially if I want to have a long-running notification filter running that will remain active for the lifetime of the app? Basically, I'm curious to see an example of the code surrounding this snippet.

Can we use async await on under iOS 15?

Hi, I'd like to start playing around with the new Swift Concurrency framework in a Swift Package, but I cannot use AsyncSequence. AsyncSequence is not available despite I'm using swift-tools-version:5.5 in my package manifest.

How to iterate over a custom object given below with async sequence enum FetchError: Error { case badImage case badRequest case invalidImageURL case noURL case failedToFetchImage } struct Photo: Codable { let albumId: Int let id: Int let title: String let urlPath: String let thumbnailUrl: String } What i have tried :- func fetchAsyncImage(request:URLRequest) async throws -> [UIImage] { let (data, response) = try await URLSession.shared.data(for: request) guard (response as? HTTPURLResponse)?.statusCode == 200 else { throw FetchError.badRequest } let photos = try JSONDecoder().decode([Photo].self, from: data) guard let imagePath = photos.first?.urlPath, let imageURL = URL.init(string: imagePath) else { throw FetchError.noURL } var imageArr:[UIImage] = [] // getting error in following 2 lines // Error: For-in loop requires '[Photo]' to conform to 'AsyncSequence' for await photo in photos { // Error: Type of expression is ambiguous without more context guard let imagePath = photo.urlPath, let imageURL = URL.init(string: imagePath) else { throw FetchError.noURL } do { let (imageData, imageResponse) = try await URLSession.shared.data(from: imageURL) guard (imageResponse as? HTTPURLResponse)?.statusCode == 200 else { throw FetchError.invalidImageURL } guard let image = UIImage(data: imageData) else { throw FetchError.badImage } imageArr.append(image) } catch { throw FetchError.failedToFetchImage } } return imageArr } I tried implementing AsyncSequenc and AsyncIteratorProtocol on Photo struct as follows:- struct Photo: Codable, AsyncSequence {   typealias Element = URL       let albumId: Int   let id: Int   let title: String   let urlPath: String   let thumbnailUrl: String       struct AsyncIterator: AsyncIteratorProtocol {     let urlPath: String     mutating func next() async throws -> URL? {       do {         guard let imageURL = URL.init(string: urlPath) else { throw FetchError.noURL }         return imageURL       } catch {         throw FetchError.invalidImageURL       }     }   }       func makeAsyncIterator() -> AsyncIterator {     AsyncIterator(urlPath: urlPath)   } }