ios - 在 RxSwift 中从 ViewModel 获取字符串到 View

Question

我尝试使用 PublishSubject() 从 ViewModel 到 View 获取字符串，但 View 不是能够得到它。以下是我在 ViewModel 中的代码:

var myImageURL: PublishSubject<String> = PublishSubject<String>()

self.myService.getImage(materialNo: materialNumber).subscribe(
    onNext: { [weak self] imageURL in //I am able to get url here and want to send it to View, following doesn't work
        self?.myImageURL.onNext(imageURL)
        self?.myImageURL.onCompleted()
    },
    onError: { error in },
    onCompleted: { }
)
.disposed(by: disposeBag)

View 中的代码:

let disposeBag = DisposeBag()

self.viewModel.myImageURL.subscribe(
    onNext: { 
        print($0 + " image url")
        self.myImageView.af_setImage(withURL: URL(string: $0)!, placeholderImage:UIImage(named: "tool_placeholder"))
    },
    onError: {
        print(String(describing: $0).capitalized)
    }
)
.disposed(by: disposeBag)

虽然 viewModel 代码工作正常，但我无法在 View 中接收其值。

编辑1: 使用驱动器更新了 View 中的代码:

self.viewModel.myImageURL
        .asObservable()
        .asDriver(onErrorJustReturn: "Error")
        .drive(onNext: {
                        self. myImageView.af_setImage(withURL: URL(string: $0)!, placeholderImage:UIImage(named: "tool_placeholder"))
                    }
            )
        .disposed(by: disposeBag)

Answer 1

看来您订阅的值不正确？您定义:

var toolImageURL: PublishSubject<String> = PublishSubject<String>()

在您的 viewModel 中，但在 viewModel.myImageURL 上调用 subscribe。