iOS应用程序

    /// # getAdventures(..)
    /// Returns all WKND adventures using the `wknd-shared/adventures-all` persisted query.
    /// For this func call to work, the `wknd-shared/adventures-all` query must be deployed to the AEM environment/service specified by the host.
    ///
    /// Since HTTP requests are async, the completion syntax is used.
    func getAdventures(params: [String:String], completion: @escaping ([Adventure]) ->  ()) {

        let request = makeRequest(persistedQueryName: "wknd-shared/adventures-all", params: params)

        URLSession.shared.dataTask(with: request) { (data, response, error) in
            if ((error) != nil) {
                print("Unable to connect to AEM GraphQL endpoint")
                completion([])
            } else if (!data!.isEmpty) {
                let adventures = try! JSONDecoder().decode(Adventures.self, from: data!)
                DispatchQueue.main.async {
                    completion(adventures.data.adventureList.items)
                }
            }
        }.resume();
    }

    ...

    /// #makeRequest(..)
    /// Generic method for constructing and executing AEM GraphQL persisted queries
    private func makeRequest(persistedQueryName: String, params: [String: String] = [:]) -> URLRequest {
        // Encode optional parameters as required by AEM
        let persistedQueryParams = params.map { (param) -> String in
            encode(string: ";\(param.key)=\(param.value)")
        }.joined(separator: "")

        // Construct the AEM GraphQL persisted query URL, including optional query params
        let url: String = "\(self.scheme)://\(self.host)/graphql/execute.json/" + persistedQueryName + persistedQueryParams;

        var request = URLRequest(url: URL(string: url)!);

        // Add authentication to the AEM GraphQL persisted query requests as defined by the iOS application's configuration
        request = addAuthHeaders(request: request)

        return request
    }

    ...