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我们需要一个可以使用 docker 部署的实时数据库。

我找到了一个 Hasura/PostGreSQL docker 容器，看起来我们可以将它用于我们的目的： https ://docs.hasura.io/1.0/graphql/manual/getting-started/docker-simple.html

我发现的一件事是文档中的 URL 是错误的。是http://localhost:8080/v1/graphql和不是http://localhost:8080/graphql。

但我似乎无法从订阅中获得任何结果......我在包的 SplitNetworkTransport.swift 中遇到 BAD_ACCESS 崩溃

碰撞

我错过了什么吗？

我的 Apollo 客户端代码如下所示：

import Apollo
import ApolloWebSocket

class Apollo {
    static let shared = Apollo()

    let client: ApolloClient = {
        let authPayloads = [ "x-hasura-admin-secret": "secret" ]
        let configuration = URLSessionConfiguration.default
        configuration.httpAdditionalHeaders = authPayloads

        let wsEndpointURL = URL(string: "ws://localhost:8080/v1alpha1/graphql")!
        let endpointURL = URL(string: "http://localhost:8080/v1alpha1/graphql")!

        let map: GraphQLMap = authPayloads
        let websocket = WebSocketTransport(request: URLRequest(url: wsEndpointURL), connectingPayload: map)

        let httpNetworkTransport = HTTPNetworkTransport( url: endpointURL,  session: URLSession(configuration: configuration))

        let splitTransport = SplitNetworkTransport(httpNetworkTransport: httpNetworkTransport, webSocketNetworkTransport: websocket)

        return ApolloClient(networkTransport: splitTransport)
    }()
}

我这样称呼它：

import UIKit
import Apollo

class ViewController: UIViewController {
    private var subscription: Cancellable?
    @IBOutlet weak var label: UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.

        self.subscription = Apollo.shared.client.subscribe(subscription: MySubscriptionSubscription()) { [weak self] result in
            guard let this = self else { return }

            switch result {
                case .success(let graphQLResult):
                    if let data = graphQLResult.data {
                        this.label.text = "data"
                        print("Simon Says data: \(data)")//TODO: Remove
                    }
                case .failure(let error):
                    this.label.text = "error"
                    print("Simon Says error: \(error)")//TODO: Remove
            }
        }
    }

    deinit {
        self.subscription?.cancel()
    }
}

Ps 我正在使用 Xcode 版本 11.2.1 (11B500)、swift 5.1、Apollo swift 包 0.20.0 和来自上面链接的 Hasura 文档中 URL 的 docker-compose.yaml。

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1 回答 1

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解决方法是不使用 swift 包管理器，而是使用 COCOAPODS。

于 2019-11-29T07:46:05.043 回答