使用合并的运行时错误:dyld:找不到符号:_ $ s7Combine9PublishedV9PublisherCyx_GAadAMc [英] Runtime error using Combine: dyld: Symbol not found: _$s7Combine9PublishedV9PublisherCyx_GAadAMc

问题描述

我正在使用Xcode 11 Beta 5(11M382q)，并将iphone x与iOS 13 beta 6结合使用，尝试使用Combine时遇到此运行时错误:

I'm using Xcode 11 Beta 5 (11M382q), and iphone x with iOS 13 beta 6 and I am having this runtime error when trying to use Combine:

模型:未找到符号:_ $ s7Combine9PublishedV9PublisherCyx_GAadAMc

dyld: Symbol not found: _$s7Combine9PublishedV9PublisherCyx_GAadAMc

我有一个Core类，它是一个 ObservableObject

I have a Core class that is an ObservableObject

import SwiftUI
import Combine

open class Core: ObservableObject {
    @Published public var userId = ""

    public var isUserValid: AnyPublisher<Bool, Never> {
    return $userId.debounce(for: 0.5, scheduler: RunLoop.main).removeDuplicates().map { (user: String) in
      return user.isEmpty
    }.eraseToAnyPublisher()
  }
}

一个简单的视图

import SwiftUI
import Combine

struct LoginView: View {
    @EnvironmentObject var core: Core
    @State var isLoading: Bool = false
    @State var submitButtonEnabled: Bool = false

    var body: some View {
        VStack {
            VStack(alignment: .center) {
                Image("logo")
                    .frame(minWidth: Constants.logoWidth, minHeight: Constants.logoHeight, alignment: .center)
                    .padding(.top, Constants.logoTopPadding)
                    .animation(.default)
                    .scaledToFit()
             }
        }

        CircularButton(isLoading: $isLoading, image: Constants.submitButtonArrowImageName) {
            // Button Action
        }
        .padding(.top, Constants.submitButtonTopPadding)
        .disabled($submitButtonEnabled.value)
        .onReceive(self.core.isUserValid) { value in
          self.submitButtonEnabled = value
        }
    }
}

我的代码有什么问题?我只希望使用反应式编程的MVVM体系结构来禁用或启用按钮.

What's wrong with my code? I Just want a MVVM architecture using reactive programming to disable or enable a button.

推荐答案

我下载了Xcode 11 beta 6，iOS 13 beta 7，现在工作正常.这是先前Beta版本的错误.

I downloaded Xcode 11 beta 6, iOS 13 beta 7 and now is working fine. It was a bug from previous beta versions.

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