ios - 如何使用 RxSwift 检测双击

Question

我正在尝试使用 RxSwift 检测双击

如果没有 RxSwift，我会是这样的:

private func setupFakePanView() {
    let singleTapGesture = UITapGestureRecognizer()
    let doubleTapGesture = UITapGestureRecognizer()

    singleTapGesture.numberOfTapsRequired = 1
    doubleTapGesture.numberOfTapsRequired = 2

    singleTapGesture.addTarget(self, action: #selector(self.tapped))
    doubleTapGesture.addTarget(self, action: #selector(self.doubleTapped))

    someView.addGestureRecognizer(singleTapGesture)
    someView.addGestureRecognizer(doubleTapGesture)

    singleTapGesture.require(toFail: doubleTapGesture)
}

@objc private func tapped() {
    // Do something
}

@objc private func doubleTapped() {
    // Do something else
}

有没有办法可以使用 RxSwift、RxCocoa 和 RxGesture 实现相同的效果？我已经尝试过以下方法，但当然不起作用:

someView.rx
    .tapGesture(numberOfTouchesRequired: 1, numberOfTapsRequired: 1)
    .when(.recognized)
    .subscribe(onNext: { _ in
        // Do something
    })
    .disposed(by: bag)

someView.rx
    .tapGesture(numberOfTouchesRequired: 1, numberOfTapsRequired: 2)
    .when(.recognized)
    .subscribe(onNext: { _ in
        // Do something else
    })
    .disposed(by: bag)

有没有办法让第一个 tapGesture 知道第二个一定会失败？

Answer 1

我找到了两个解决方案来解决这个问题!

A.使用自定义 UITapGestureRecognizer

let doubleTapGesture = UITapGestureRecognizer()
doubleTapGesture.numberOfTapsRequired = 2

let singleTapGesture = UITapGestureRecognizer()
singleTapGesture.numberOfTapsRequired = 1
singleTapGesture.require(toFail: doubleTapGesture)

let singleTap = someView.rx
    .gesture(singleTapGesture)
    .when(.recognized)
    .subscribe(onNext: { _ in
        // Do something
    })
    .disposed(by: bag)


let doubleTap = someView.rx
    .gesture(doubleTapGesture)
    .when(.recognized)
    .subscribe(onNext: { _ in
        // Do something else
    })
    .disposed(by: bag)

或者..

B。使用自定义 UIGestureRecognizerDelegate

谢谢Kishan建议Jegnux's answer !

1 - 为单击手势设置自定义委托(delegate)...

someView.rx
    .tapGesture(
        numberOfTouchesRequired: 1,
        numberOfTapsRequired: 1,
        configuration: { [weak self] gesture, delegate in
            gesture.delegate = self
        }
    )
    .subscribe(onNext: { _ in
        // Do something
    })
    .disposed(by: bag)

// double tap same as before

2 - 实现 gestureRecognizer(_:shouldRequireFailureOf:)

extension MyController: UIGestureRecognizerDelegate {
    func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRequireFailureOf otherGestureRecognizer: UIGestureRecognizer) -> Bool {
        if let gesture = otherGestureRecognizer as? UITapGestureRecognizer, gesture.numberOfTapsRequired == 2 {
             return true
        }
        return false
    }
}

两种解决方案都工作正常。