浅谈RxSwift 网络请求

import Foundation
import Moya
enum APIService{
  case mainClassList
}

extension APIService:TargetType{

  var baseURL: URL {
    return URL(string:"http://cmsadmin.fotoable.net")!
  }
  
  var path: String {
    switch self {
    case .mainClassList:
       return "/sandboxColor/category"
    }
  }
  
  var method: Moya.Method {
    switch self {
    case .mainClassList:
       return .get
    }
  }
  
  var parameters: [String : Any]? {
    
    switch self {
    case .mainClassList:
      return nil
    }
  }
  
  var parameterEncoding: ParameterEncoding {
    
    return URLEncoding.default
  }
  
  var sampleData: Data {
    return "{}".data(using: String.Encoding.utf8)!
  }
  
  var task: Task {
    return .requestPlain
  }
  
  var headers: [String : String]? {
    return nil
  }
}

import Foundation
import RxSwift
import Moya
import ObjectMapper

// MARK: - Json -> Model
extension Response {
  
  func mapObjectModel<T: BaseMappable>(_ type: T.Type, context: MapContext? = nil) throws -> T {
    guard let object = Mapper<T>(context: context).map(JSONObject: try mapJSON()) else {
      throw MoyaError.jsonMapping(self)
    }
    return object
  }
  
  func mapObjectArray<T: BaseMappable>(_ type: T.Type, context: MapContext? = nil) throws -> [T] {
    guard let array = try mapJSON() as? [[String : Any]] else {
      throw MoyaError.jsonMapping(self)
    }
    return Mapper<T>(context: context).mapArray(JSONArray: array)
  }
}

// MARK: - Json -> Observable<Model>

extension ObservableType where E == Response {
  // 将Json解析为Observable<Model>
  public func mapObjectModel<T: BaseMappable>(_ type: T.Type) -> Observable<T> {
    return flatMap { response -> Observable<T> in
      return Observable.just(try response.mapObjectModel(T.self))
    }
  }
  // 将Json解析为Observable<[Model]>
  public func mapObjectArray<T: BaseMappable>(_ type: T.Type) -> Observable<[T]> {
    return flatMap { response -> Observable<[T]> in
      return Observable.just(try response.mapObjectArray(T.self))
    }
  }
}

import Foundation
import RxSwift
import Moya
import HandyJSON

extension ObservableType where E == Response {
  public func mapHandyJsonModel<T: HandyJSON>(_ type: T.Type) -> Observable<T> {
    return flatMap { response -> Observable<T> in
      return Observable.just(response.mapHandyJsonModel(T.self))
    }
  }
}

extension Response {
  func mapHandyJsonModel<T: HandyJSON>(_ type: T.Type) -> T {
    let jsonString = String.init(data: data, encoding: .utf8)
    if let modelT = JSONDeserializer<T>.deserializeFrom(json: jsonString) {
      return modelT
    }
    return JSONDeserializer<T>.deserializeFrom(json: "{\"msg\":\"请求有误\"}")!
  }
}

import RxSwift
import Moya
import ObjectMapper
import HandyJSON
import RxCocoa

class MainClassViewModel {

  private let provider = MoyaProvider<APIService>()
  let disposeBag = DisposeBag()
  var dataSource = BehaviorRelay<[MainClassModelMapObject_sub]>(value:[])
  var networkError = BehaviorRelay(value: Error.self)
}


//MARK: -- 网络
extension MainClassViewModel {
  
  //网络请求-- ObjectMapper
  func getClassListWithMapObject(){
    provider.rx.request(.mainClassList).asObservable().mapObjectModel(MainClassModelMapObject.self).subscribe({ [unowned self] (event) in
      
      switch event {
      case let .next(classModel):
        print("ObjectMapper -- 加载网络成功")
        self.dataSource.accept(classModel.data)
        
      case let .error( error):
        print("error:", error)
        self.networkError.accept(error as! Error.Protocol)
      case .completed: break
      }
    }).disposed(by: self.disposeBag)
  }
  
  
  //网络请求-- HandyJSON
  func getClassListWithMapHandyJson(){
    provider.rx.request(.mainClassList).asObservable().mapHandyJsonModel(MainClassModel.self).subscribe({ [unowned self] (event) in
      
      switch event {
      case let .next(classModel):
        
        print("HandyJSON -- 加载网络成功")
        
      case let .error( error):
        print("error:", error)
        self.networkError.accept(error as! Error.Protocol)
      case .completed: break
      }
    }).disposed(by: self.disposeBag)
  }
  
}

import UIKit
import ObjectMapper

class MainClassModelMapObject: Mappable {
  
  var code:NSInteger?
  var data:[MainClassModelMapObject_sub]!
  
  required init?(map: Map) {}
  
  func mapping(map: Map) {
    code <- map["code"]
    data <- map["data"]
  }
}

class MainClassModelMapObject_sub: Mappable {
  
  var ID:String?
  var name:String?
  var desc:String?
  var imgUrl:String?
  var gifUrl:String?
  var isUpdate:Bool?
  var backgroundGroup:NSInteger?
  
  required init?(map: Map) {}
  
  func mapping(map: Map) {
    
    ID <- map["ID"]
    name <- map["name"]
    desc <- map["desc"]
    imgUrl <- map["imgUrl"]
    gifUrl <- map["gifUrl"]
    isUpdate <- map["isUpdate"]
    backgroundGroup <- map["backgroundGroup"]
  }
}

import UIKit
import HandyJSON

struct MainClassModel: HandyJSON {

  var code:NSInteger?
  var data:[MainClassModel_sub]!
}

struct MainClassModel_sub: HandyJSON {
  
  var ID:String?
  var name:String?
  var desc:String?
  var imgUrl:String?
  var gifUrl:String?
  var isUpdate:Bool?
  var backgroundGroup:NSInteger?
}

 //cell
   viewModel.dataSource.bind(to: tableView.rx.items) { (tableView, row, element) in
      let cell = tableView.dequeueReusableCell(withIdentifier: "MainClassTableViewCell", for: IndexPath(row: row, section: 0)) as! MainClassTableViewCell
      
      cell.setModel(model: element)
      // configure cell
      return cell
      }
      .disposed(by: disposeBag)