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Calling Async Functions in SwiftUI
Hi, I'd like to call an Async function upon a state change or onAppear() but I'm not sure how to do so. Below is my code: .onAppear() { if !subscribed { await Subscriptions().checkSubscriptionStatus() } } class Subscriptions { var subscribed = UserDefaults.standard.bool(forKey: "subscribed") func checkSubscriptionStatus() async { if !subscribed { await loadProducts() } } func loadProducts() async { for await purchaseIntent in PurchaseIntent.intents { // Complete the purchase workflow. await purchaseProduct(purchaseIntent.product) } } func purchaseProduct(_ product: Product) async { // Complete the purchase workflow. do { try await product.purchase() } catch { // Add your error handling here. } // Add your remaining purchase workflow here. } }
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Jan ’25
Handling Context Save Errors
I was wondering if errors are common for the code below for saving SwiftData data and what would be the best way to handle them (popup, closing the app)? do { try modelContext.save() } catch { print("error") }
Topic: Design SubTopic: General Tags:
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Passing binding variable to function with optional parameter
Hi, I have a view that takes an optional binding boolean variable. I'd like to pass a variable to it from certain views only. The problem I'm having is when I pass a variable, I get the error "Cannot convert value of type 'Binding' to expected argument type 'Binding<Bool?>'", and when I don't, I get the error "Missing argument for parameter 'toggle' in call". Below Is the code I have. Thank you. Heading(text: "Heading1") // error: Missing argument for parameter 'toggle' in call Heading(text: "Heading2", toggle: $newEntry) // Cannot convert value of type 'Binding<Bool>' to expected argument type 'Binding<Bool?>' struct Heading: View { @State var text: String @Binding var toggle: Bool? var body: some View { VStack { Spacer() .frame(height: 25) HStack { Text(text) .font(.system(size: 36)) Spacer() if text == "str" { Button(action: { toggle!.toggle() }) { Image(systemName: "plus") .foregroundColor(.black) .font(.system(size: 36)) } } } Spacer() .frame(height: 25) } } }
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Apr ’24
Condensing HTTP request functions
Hi, For HTTP requests, I have the following function: func createAccount(account: Account, completion: @escaping (Response) -> Void) { guard let url = URL(string: "http://localhost:4300/account") else { return } var request = URLRequest(url: url) request.httpMethod = "POST" request.setValue("application/json", forHTTPHeaderField: "Content-Type") guard let encoded = try? JSONEncoder().encode(account) else { print("Failed to encode request") return } request.httpBody = encoded URLSession.shared.dataTask(with: request) { (data, response, error) in guard let data = data else { return } do { let resData = try JSONDecoder().decode(Response, from: data) DispatchQueue.main.async { completion(resData) } } catch let jsonError as NSError { print("JSON decode failed: \(jsonError)") } }.resume() } Because various HTTP requests use different body structs and response structs, I have a HTTP request function for each individual HTTP request. How can I condense this into one function, where the passed struct and return struct are varying, so I can perhaps pass the struct types in addition to the data to the function? Any guidance would be greatly appreciated.
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Aug ’24
StoreKit Subscription Price Not Updating
I updated the price of subscriptions within an app in App Store Connect, however the new price does not show within the test app. I would just like to make sure that if the app is released that the subscription price is set to the most recent price. Is there any way to confirm that and is there a way to see the new price in the test app?
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