当我将协调器与 mvvm-c Rxswift 一起使用时，如何推送新视图？答案

【问题标题】：How i can push new view when i use coordinator with mvvm-c Rxswift?当我将协调器与 mvvm-c Rxswift 一起使用时，如何推送新视图？
【发布时间】：2020-07-08 08:38:32
【问题描述】：

我使用 MVVM-C (Rxswift) 我必须创建 homeVC 、 HomeViewModel 和 HomeCoordinator 当我尝试将 HomeCoordinator 与 HomeViewModel 连接以将新 VC 推送到 Coordinator 时，它没有采取任何行动谁能帮我举个例子或解释一下如何解决这个问题？

【问题讨论】：

标签： swift xcode mvvm viewmodel rx-swift

【解决方案1】：

也许这个例子会对你有所帮助：

//
//  ExampleLiftData.swift
//
//  Created by Daniel Tartaglia on 2/18/20.
//  Copyright © 2020 Daniel Tartaglia. MIT License.
//
import UIKit
import RxSwift
import RxCocoa
import RxEnumKit
import EnumKit

// MARK: - ExamplePresenter
func presentExample(window: UIWindow) {
    let value = PublishSubject<String>()
    let storyboard = UIStoryboard(name: "Example", bundle: nil)
    let controller = storyboard.instantiateInitialViewController() as! ExampleViewController
    let action = controller.install(viewModel: exampleViewModel(value: value.asObservable()))
    _ = action
        .filter(case: ExampleAction.showRequest)
        .flatMap { [unowned controller] _ in
            presentRequest(on: controller, title: "", message: "Add how much?")
        }
        .bind(to: value)
    window.rootViewController = controller
}

enum ExampleAction: CaseAccessible {
    case showRequest
}

// MARK: - ExampleViewModel
func exampleViewModel(value: Observable<String>) -> (ExampleInput) -> (ExampleOutput, Observable<ExampleAction>) {
    return { input in
        let state = value
            .compactMap { Int($0) }
            .scan(0, accumulator: +)
            .startWith(0)
        return (
            ExampleOutput(text: state.map { "\($0)" }),
            input.buttonTapped.map { ExampleAction.showRequest }
        )
    }
}

struct ExampleInput {
    let buttonTapped: Observable<Void>
}

// MARK: - ExampleView
class ExampleViewController: UIViewController, HasViewModel {
    @IBOutlet weak var button: UIButton!
    @IBOutlet weak var label: UILabel!
    var buildOutput: (ExampleInput) -> ExampleOutput = { _ in fatalError() }
    private let disposeBag = DisposeBag()
    override func viewDidLoad() {
        super.viewDidLoad()
        let input = ExampleInput(
            buttonTapped: button.rx.tap.asObservable()
        )
        let output = buildOutput(input)
        output.text.bind(to: label.rx.text).disposed(by: disposeBag)
    }
}

struct ExampleOutput {
    let text: Observable<String>
}

// MARK: - AlertPresenter
func presentRequest(on root: UIViewController, title: String, message: String) -> Observable<String> {
    let result = PublishSubject<String>()
    let controller = UIAlertController(title: title.isEmpty ? nil : title, message: message.isEmpty ? nil : message, preferredStyle: .alert)
    controller.addTextField(configurationHandler: { $0.keyboardType = .numberPad })
    let ok = UIAlertAction(title: "OK", style: .default, handler: { [unowned controller] _ in
        result.onNext(controller.textFields?[0].text ?? "")
        result.onCompleted()
    })
    let cancel = UIAlertAction(title: "Cancel", style: .default, handler: { _ in
        result.onCompleted()
    })
    controller.addAction(ok)
    controller.addAction(cancel)
    root.present(controller, animated: true)
    return result
}

通过https://github.com/danielt1263/RxEarthquake了解更多信息

【讨论】：