Bật tính năng mua hàng với Flow Builder trong iOS SDK

Trong SwiftUI, khi hiển thị flow, bạn cũng cần xử lý các sự kiện. didFailPurchase, didFinishRestore, didFailRestore, và didReceiveError là bắt buộc. Khi kiểm thử, bạn có thể chỉ cần sao chép code từ đoạn snippet dưới đây để ghi log các sự kiện này.

.flow(
    isPresented: $flowPresented,
    flowConfiguration: flowConfiguration,
    didFailPurchase: { product, error in
        print("Purchase failed: \(error)")
    },
    didFinishRestore: { profile in
        print("Restore finished successfully")
    },
    didFailRestore: { error in
        print("Restore failed: \(error)")
    },
    didReceiveError: { error in
        flowPresented = false
        print("Flow error: \(error)")
    }
)

func presentFlow(with config: AdaptyUI.FlowConfiguration) {
    let flowController = try AdaptyUI.flowController(
        with: config,
        delegate: self
    )
    present(flowController, animated: true)
}

Triển khai AdaptyFlowControllerDelegate để xử lý các sự kiện. Tối thiểu, hãy triển khai các error handler bắt buộc (ba phương thức không có implementation mặc định):

extension YourViewController: AdaptyFlowControllerDelegate {
    func flowController(_ controller: AdaptyFlowController,
                        didFailPurchase product: AdaptyPaywallProduct,
                        error: AdaptyError) {
        print("Purchase failed: \(error)")
    }

    func flowController(_ controller: AdaptyFlowController,
                        didFinishRestoreWith profile: AdaptyProfile) {
        print("Restore finished successfully")
    }

    func flowController(_ controller: AdaptyFlowController,
                        didFailRestoreWith error: AdaptyError) {
        print("Restore failed: \(error)")
    }
}

.flow(
    isPresented: $flowPresented,
    flowConfiguration: flowConfiguration,
    didPerformAction: { action in
        switch action {
            case .close:
                flowPresented = false // dismiss the flow when the user taps close
            default:
                break
        }
    },
    didFailPurchase: { product, error in /* handle the error */ },
    didFinishRestore: { profile in /* check access level and dismiss */ },
    didFailRestore: { error in /* handle the error */ },
    didReceiveError: { error in flowPresented = false }
)

extension YourViewController: AdaptyFlowControllerDelegate {
    func flowController(_ controller: AdaptyFlowController,
                        didPerform action: AdaptyUI.Action) {
        switch action {
            case .close:
                controller.dismiss(animated: true) // default behavior — override only if needed
            default:
                break
        }
    }
}

struct ContentView: View {
    @State private var flowPresented = false
    @State private var flowConfiguration: AdaptyUI.FlowConfiguration?
    @State private var isLoading = false
    @State private var hasInitialized = false

    var body: some View {
        VStack {
            if isLoading {
                ProgressView("Loading...")
            } else {
                Text("Your App Content")
            }
        }
        .task {
            guard !hasInitialized else { return }
            await initializeFlow()
            hasInitialized = true
        }
        .flow(
            isPresented: $flowPresented,
            flowConfiguration: flowConfiguration,
            didPerformAction: { action in
                switch action {
                case .close:
                    flowPresented = false
                default:
                    break
                }
            },
            didFailPurchase: { product, error in
                print("Purchase failed: \(error)")
            },
            didFinishRestore: { profile in
                print("Restore finished successfully")
            },
            didFailRestore: { error in
                print("Restore failed: \(error)")
            },
            didReceiveError: { error in
                print("Flow error: \(error)")
                flowPresented = false
            }
        )
    }

    private func initializeFlow() async {
        isLoading = true
        defer { isLoading = false }

        await loadFlow()
        flowPresented = true
    }

    private func loadFlow() async {
        do {
            let flow = try await Adapty.getFlow(placementId: "YOUR_PLACEMENT_ID")
            guard flow.hasViewConfiguration else {
                print("Flow doesn't have a view configuration")
                return
            }
            flowConfiguration = try await AdaptyUI.getFlowConfiguration(forFlow: flow)
        } catch {
            print("Failed to load: \(error)")
        }
    }
}

class ViewController: UIViewController {
    private var flowConfiguration: AdaptyUI.FlowConfiguration?

    override func viewDidLoad() {
        super.viewDidLoad()

        Task {
            await initializeFlow()
        }
    }

    private func initializeFlow() async {
        do {
            flowConfiguration = try await loadFlow()

            if let flowConfiguration {
                await MainActor.run {
                    presentFlow(with: flowConfiguration)
                }
            }
        } catch {
            print("Error initializing: \(error)")
        }
    }

    private func loadFlow() async throws -> AdaptyUI.FlowConfiguration? {
        let flow = try await Adapty.getFlow(placementId: "YOUR_PLACEMENT_ID")

        guard flow.hasViewConfiguration else {
            print("Flow doesn't have a view configuration")
            return nil
        }

        return try await AdaptyUI.getFlowConfiguration(forFlow: flow)
    }

    private func presentFlow(with config: AdaptyUI.FlowConfiguration) {
        guard let flowController = try? AdaptyUI.flowController(
            with: config,
            delegate: self
        ) else { return }

        present(flowController, animated: true)
    }
}

extension ViewController: AdaptyFlowControllerDelegate {
    func flowController(_ controller: AdaptyFlowController,
                        didFailPurchase product: AdaptyPaywallProduct,
                        error: AdaptyError) {
        print("Purchase failed for \(product.vendorProductId): \(error)")

        guard error.adaptyErrorCode != .paymentCancelled else { return }

        let message = switch error.adaptyErrorCode {
        case .paymentNotAllowed:
            "Purchases are not allowed on this device."
        default:
            "Purchase failed. Please try again."
        }

        let alert = UIAlertController(title: "Purchase Error", message: message, preferredStyle: .alert)
        alert.addAction(UIAlertAction(title: "OK", style: .default))
        present(alert, animated: true)
    }

    func flowController(_ controller: AdaptyFlowController,
                        didFinishRestoreWith profile: AdaptyProfile) {
        print("Restore finished successfully")
        controller.dismiss(animated: true)
    }

    func flowController(_ controller: AdaptyFlowController,
                        didFailRestoreWith error: AdaptyError) {
        print("Restore failed: \(error)")
    }

    func flowController(_ controller: AdaptyFlowController,
                        didReceiveError error: AdaptyUIError) {
        print("Flow error: \(error)")
        controller.dismiss(animated: true)
    }
}