'SingleEvent<_>' 中的成员 'success' 产生类型为 'SingleEvent<Element>' 的结果

Question

有人可以解释这里的错误是什么吗？

Member 'success' in 'SingleEvent<_>' produces result of type 'SingleEvent<Element>', but context expects 'SingleEvent<_>'

如果结果案例是 .success 我想在单个事件中传递 JSON

这是完整的代码

import Foundation
import RxSwift

public class APIClient<T: APIProtocol> {
    var disposeBag: DisposeBag = DisposeBag()
}

extension APIClient {
    public func get<U>(apiService: T, key: String) -> Single<U> {
        return Single.create { single in

            let task = TaskRequestManager.run(apiService, completion: { result in
                DispatchQueue.main.async {
                    switch result {

                    case .error(let error):
                        single(.error(error))
                    case .success(let json):

                        guard let JSON = json[key] as? [String: Any] else {
                            single(.error(ApiError.jsonParsingFailure))
                            return
                        }
                        single(.success(JSON))
                    }
                }

            })
            task.resume()
            return Disposables.create {
                task.cancel()
            }
    }
        }
}

Answer 1

改变这个

return Single.create { single in

进入这个

return Single<U>.create { single in