Question

我遇到了错误

严重错误：找不到类型为LoginResponse的ObservableObject。作为该视图的祖先，可能缺少用于LoginResponse的View.environmentObject（_：）。

我已将环境对象传递给LoginView（）的所有子视图，但错误仍然存在

struct LoginView: View {
    
    @State var loginCredentials = Credentials()
    var loginResponse = LoginResponse()
    var dataCall = DataCall()
    
    var body: some View {
        VStack{
            
            Button(action:{self.dataCall.AttemptLogin(loginCredentials: self.loginCredentials)}){
                
                Text("LOGIN")
                
            }
            
            Text("\(self.loginResponse.jwt)")
            
        }
        .environmentObject(self.loginResponse)
        .padding(.horizontal)
    }
}

如果需要，这里是其余的代码

struct Credentials: Encodable {
    var login: String = ""
    var password: String = ""
}

class LoginResponse: Decodable, ObservableObject {
    
    enum CodingKeys: CodingKey {
        case success, userId, jwt
    }
    
    @Published var success: Bool = false
    @Published var userId: String = ""
    var error: String = ""
    @Published var jwt: String = ""
    init(){}
    required init(from decoder: Decoder) throws {
        let values = try decoder.container(keyedBy: CodingKeys.self)
        success = try values.decode(Bool.self, forKey: .success)
        userId = try values.decode(String.self, forKey: .userId)
        jwt = try values.decode(String.self, forKey: .jwt)
    }
}

struct DataCall {
    
    @EnvironmentObject var dataResponse : LoginResponse
    
    func AttemptLogin(loginCredentials: Credentials)  {
        
        let loginResponse = LoginResponse()
        dataResponse.success = loginResponse.success
        
        }
}

Answer 1

由于DataCall不是SwiftUI视图，因此我认为您不能使用.environmentObject修饰符将数据传递给它。相反，只需在LoginResponse结构中添加对DataCall对象的引用，然后像普通一样将其传递给构造函数即可。

示例：

struct DataCall {
  weak var dataResponse : LoginResponse
  ...
}

let dataCall = DataCall(dataResponse: loginResponse)

但是，我对您的视图设计感到非常困惑。您在视图中正常声明的任何对象，如果没有@State或@ObservedObject，将一遍又一遍地创建。那是你想要的吗？

SwiftUI @EnvironmentObject否类型为ObservableObject的错误

1 个答案: