如何在点击按钮时观察 PublishSubject

Question

我正在处理这种情况，我想在这里应用 RxSwift。

我有 .xib 带按钮的 UIView。

class RightButtonItemView: UIView {

    @IBOutlet weak var rightButtonimageView: UIImageView!
    @IBOutlet weak var rightButtonButton: UIButton!

    let performEventSegue = PublishSubject<Bool>()

    class func instanceFromNib() -> RightButtonItemView {
        return UINib(nibName: "NotificationView", bundle: nil).instantiate(withOwner: nil, options: nil)[0] as!  RightButtonItemView
    }

    override func awakeFromNib() {
       //I'm not sure how should I link button tap and my subject 
       rightButtonButton.rx.tap
    }
}

我在 viewController

中创建了这个视图的一个实例

var rightButtonItemView = RightButtonItemView.instanceFromNib()

Bu 在我的 segue 中点击这个按钮我需要移动到下一个 VC，所以我订阅了 UIView 的主题

rightButtonItemView.performEventSegue.asObserver().subscribe(onNext: { (isAuthorized) in

        if isAuthorized {
            let storyboard = UIStoryboard(name: "Notifications", bundle: nil)
            let viewController = storyboard.instantiateViewController(withIdentifier: "UserNotificationsViewController")
            self.present(viewController, animated: true, completion: nil)
        }
    })

但我无法了解如何在更改发布主题状态时点击 link 按钮？

Answer 1

您在这种情况下使用 bind 运算符：

class RightButtonItemView: UIView {

    @IBOutlet weak var rightButtonimageView: UIImageView!
    @IBOutlet weak var rightButtonButton: UIButton!

    let performEventSegue = PublishSubject<Void>()
    private let bag = DisposeBag()

    class func instanceFromNib() -> RightButtonItemView {
        return UINib(nibName: "NotificationView", bundle: nil).instantiate(withOwner: nil, options: nil)[0] as!  RightButtonItemView
    }

    override func awakeFromNib() {
        rightButtonButton.rx.tap
            .bind(to: performEventSegue)
            .disposed(by: bag)
    }
}

-- 更新--

我想到了这个解决方案，我认为它更好。您根本不需要主题：

class RightButtonItemView: UIView {

    @IBOutlet weak var rightButtonButton: UIButton!

    var performEventSegue: Observable<Void> {
        return rightButtonButton.rx.tap.asObservable()
    }
}

如何在点击按钮时观察 PublishSubject

how to observe PublishSubject on button tap

uiview

ios

rx-swift

rx-cocoa