Swift 从服务器接收数据保存Model #DataProvider #NetworkDataProvider_swift 接收数据处理

Swift DataProvider NetworkDataProvider
从服务器接收数据，保存到model里

第一步：在DataProvider里添加这个方法

protocol DataProvider {
 func collectData(_ completionHandler: CompletionHandler?)
 }
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第二步：在NetworkDataProvider里添加这个方法

final class NetworkDataProvider: DataProvider {
	  func collectData(_ completionHandler: CompletionHandler?) {
        self.processRequest(CollectDataRequest(), completionHandler)
    }
  }
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第三步：在Requset里添加这个class

class CollectDataRequest: JsonRequest<CollectData> {
    init() {
        super.init(method: .get, urlPath: "(服务器的网址)")
    }
    
    override func needsAccessToken() -> Bool {
        return false
    }
}
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第四步：在Model里添加这个class

class CollectData: Codable {
    public var notes: [CollectNote] = []
    public var stat: HomeCount
    
    private enum CodingKeys: String, CodingKey {
        case notes
        case stat
    }
    
    required public init(from decoder: Decoder) throws {
        let container = try decoder.container(keyedBy: CodingKeys.self)
        self.notes = try container.decode(.notes)
        self.stat = try container.decode(.stat)
    }
}
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第五步：在NetworkDataProvider里添加这个两个方法

    // MARK: - Private methods
    private func processRequest(_ request: BaseRequest,_ completionHandler: CompletionHandler?) -> Void {
        self.executeRequest(request, completionHandler)
    }
    
    private func executeRequest(_ request: BaseRequest,_ completionHandler: CompletionHandler?) -> Void {
        NetworkProvider.shared.sendRequest(request) {(_ data: Any, _ error: Error?) in
            completionHandler?(data, error)
        }
    }
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第六步：在NetworkDataProvider里添加这个方法

  func sendRequest(_ baseRequest: BaseRequest, _ completionHandler: CompletionHandler?) -> Void {
        //Send the request
        self.alamofireManager?.request(baseRequest).validate().responseJSON { response in
            switch response.result {
            case .success:
                if let json = response.result.value {
                    print(json)
                    guard let completionHandler = completionHandler else { return }
                    guard let res = response.data else { return }
                    guard let jsonResponse = try? JSON(data: res) else { return }
                    if jsonResponse["success"].boolValue {
                        let data = try? jsonResponse["data"].rawData()
                        let allData = try? jsonResponse.rawData()
                        let responseData = baseRequest.parseNetworkResponse(data ?? allData ?? Data())
                        completionHandler(responseData, nil)
                    } else {
                        completionHandler(nil, MyError(message: jsonResponse["message"].stringValue))
                    }
                }
            case .failure:
                if response.error.debugDescription.contains("\(NSURLErrorTimedOut)") || response.error.debugDescription.contains("\(NSURLErrorNotConnectedToInternet)") {
                    DispatchQueue.main.async {
                        H.error(H.t("no_network.title"), cancelTitle: H.t("common.cancel"), confirmTitle: H.t("no_network.open_setting")) {
                            guard let settingsUrl = URL(string: UIApplication.openSettingsURLString) else { return }
                            UIApplication.shared.open(settingsUrl, options: [:], completionHandler: nil)
                        }
                    }
                }
                break
            }
        }
    }
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第七步：到这里网络配置就告一段落了，下面就是调用了，在你需要用的页面进行一个方法的调用

func loadData() {
        DataManager.dataProvider.collectData() { (data, error) in
            if let error = error as? MyError {
                H.error(error.message)
                return
            }
            if let countsData = data as? CollectData {
                self.counts = countsData.stat
                self.searchSection.setData(homeCount: self.counts ?? HomeCount())
                self.vTable.reloadData()
            }
        }
    }
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第八步：我们来看看保存下来的数据
这里我们可以看到，我们之前服务器返回的数据是这个：

在这里我们就能看到，服务器返回的数据和我们这里获取到的数据是一样的，这样我们就可以存储这些数据用于显示等各种用途了：