Question

我有以下代码：

loginViewModel.facebookLogin
.asObservable()
subscribe() { [unowned self] facebookLogin in
     if let isLoggedIn = facebookLogin.element?.isLoggedIn {
         if isLoggedIn {
              elf.performSegue(withIdentifier: "toRestaurantSelect", sender: self)
              }
      }

     if let didLoginFail = facebookLogin.element?.didLoginFail {
         self.errorLabel.isHidden = !didLoginFail
     }
  }
.disposed(by: disposeBag)

facebookLogin是一个变量，在用户登录时会更新。但是，不会调用performSegue（条件为true）。奇怪的是，如果我在模拟器中打开慢动画，就会执行segue。当关闭慢动画时，segue不会执行（Facebook登录工作）。任何帮助表示赞赏。谢谢！

Answer 1

我认为您应该使用主线程来使其正常工作

    loginViewModel.facebookLogin
        .asObservable()
        .subscribe() { [unowned self] facebookLogin in
            if let isLoggedIn = facebookLogin.element?.isLoggedIn {
                if isLoggedIn {


                    DispatchQueue.main.async {
                        self.performSegue(withIdentifier: "toRestaurantSelect", sender: self)

                    }



                }
            }

            if let didLoginFail = facebookLogin.element?.didLoginFail {
                self.errorLabel.isHidden = !didLoginFail
            }
        }
        .disposed(by: disposeBag)

Answer 2

使用主调度程序进行观察：

loginViewModel.facebookLogin
.asObservable()

// Switch to the main scheduler
.observeOn(MainScheduler.instance)


subscribe() { [unowned self] facebookLogin in
     if let isLoggedIn = facebookLogin.element?.isLoggedIn {
         if isLoggedIn {
              elf.performSegue(withIdentifier: "toRestaurantSelect", sender: self)
              }
      }

     if let didLoginFail = facebookLogin.element?.didLoginFail {
         self.errorLabel.isHidden = !didLoginFail
     }
  }
.disposed(by: disposeBag)

swift - performSegue无法在RxSwift Observable订阅中工作

2 个答案: