ios - 如何从HTTPS云函数返回错误？

Question

从 iOS 应用程序调用云函数如下所示:

var functions = Functions.functions()
functions.httpsCallable(name).call(data){ (result, error) in
    // Code here
}

如何从我的云函数发送错误，以便在上面的代码中拾取该错误？例如:

云功能:

exports.joinGame = functions.https.onCall((data, context) => {
     return Error("The game is full")
})

SwiftUI:

var functions = Functions.functions()
functions.httpsCallable("joinGame").call(data){ (result, error) in
    print(error) // "The game is full"
}

Answer 1

我仍然不确定你想在哪里返回错误...但这里有一些可能的处理变体:

@State private var error: Error?

var body: some View {
   VStack {
     Text("Wait for Error")
       .onAppear {
         functions.httpsCallable("joinGame").call(data){ (result, error) in
            print(error) // "The game is full"
            DispatchQueue.main.async {
               self.error = error
            }
         }
     }
     if nil != error {
        Text("Got error!")   // << do anything with error here
     }
   }
   .onChange(of: error) { newError in
                            // << or here 
   }
}