RxSwift Chaining：在 Rxswift 中写这个的更好方法是什么？

Question

我是 RxSwift 的新手。很新。通常要在没有 Rx 的情况下链接你，你将下一个函数放在一个完成闭包中。我的同事告诉我改用 flatmap 或我们的 concatmap 版本，但从未给我一个例子。任何人都可以用 flatmap 或 swift 版本的 concatmap 转换这段代码吗？同样，我很新，所以请对判断保持温和。

 SVProgressHUD.show()
    params.address = address
    print(params)
    viewmodel
      .postSeekerAvatar(image: image).subscribe(onSuccess: {
//        SVProgressHUD.dismiss()
//        SVProgressHUD.show()
        self.viewmodel
          .updateSeeker(withFirstName: params.firstName, lastName: params.lastName, isBusiness: params.isBusiness, abn: "none", address: params.address)
          .subscribe(onSuccess: {
            SVProgressHUD.dismiss()

        self.performSegue(withIdentifier: SegueConstants.toProfileForm, sender: self)

      }) { (error) in
        SVProgressHUD.showDismissableError(with: error.message)
      }.disposed(by: self.disposeBag)
  }) { (error) in
    SVProgressHUD.showDismissableInfo(with: error.message)
  }.disposed(by: disposeBag)

Answer 1

postSeekerAvatar() method should return a Single response 
Add showLoader/hideLoader method in BaseViewController. 

viewmodel
    .postSeekerAvatar(image: image) //Return Single<Response>
    .do(onSubscribed: presenter.showLoader)
    .do(onDispose: presenter.hideLoader)
    .asCompletable()
    .andThen(update(params: params))
    .subscribe()
    .disposeOnDeactivate(interactor: self)

//Returns a completable 
  private func update(params: Model) -> Completable {
    viewmodel
      .updateSeeker(
        withFirstName: params.firstName,
        lastName: params.lastName,
        isBusiness: params.isBusiness,
        abn: "none",
        address: params.address
    )
    return Completable.empty()
  }

Answer 2

所以，您想要的是永远不会有嵌套的 subscribe 调用。相反，您将转换源可观察值，有时转换为另一个值，有时转换为另一个可观察值。

SVProgressHUD.show()
params.address = address
print(params)
viewmodel
  .postSeekerAvatar(image: image)
  .flatMap {
    self.viewmodel
      .updateSeeker(withFirstName: params.firstName, lastName: params.lastName, isBusiness: params.isBusiness, abn: "none", address: params.address)
  }
  .subscribe(onSuccess: {
    SVProgressHUD.dismiss()
      self.performSegue(withIdentifier: SegueConstants.toProfileForm, sender: self)
   }, onError: { (error) in
      SVProgressHUD.showDismissableError(with: error.message)
   })
  .disposed(by: disposeBag)

所以这里先订阅postSeekerAvatar，每推一个值，也会订阅updateSeeker。如果其中任何一个出错，错误关闭将运行.

RxSwift Chaining：在 Rxswift 中写这个的更好方法是什么？

RxSwift Chaining: What is a better way of writing this in Rxswift?

swift

rx-swift