How do I call async APIs from SwiftUI lifecycle methods?

In SwiftUI, you can call asynchronous APIs within the lifecycle methods such as `onAppear`. This is useful for fetching data when a view appears on the screen. Below is an example of how you can do this using Swift's `async`/`await` features.

When using asynchronous code, make sure to handle any possible errors gracefully and update your UI accordingly.


        <?php
        import SwiftUI

        struct ContentView: View {
            @State private var data: String = ""
            @State private var isLoading: Bool = false

            var body: some View {
                VStack {
                    if isLoading {
                        ProgressView()
                    } else {
                        Text(data)
                    }
                }
                .onAppear {
                    Task {
                        await fetchData()
                    }
                }
            }

            func fetchData() async {
                isLoading = true
                do {
                    let url = URL(string: "https://api.example.com/data")!
                    let (data, _) = try await URLSession.shared.data(from: url)
                    self.data = String(data: data, encoding: .utf8) ?? "No data"
                } catch {
                    print("Error fetching data: \(error)")
                }
                isLoading = false
            }
        }
        ?>

SwiftUI async APIs lifecycle methods onAppear async/await URLSession fetching data

How do I call async APIs from SwiftUI lifecycle methods?

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How do I call async APIs from SwiftUI lifecycle methods?

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