Question

我有一个委托，我用它来触发Pageview控制器的下一页，并且我有6个viewcontroller附加到页面viewcontroller。在3个不同的控制器中进行前3次调用之后，委托停止被调用，因此，不会触发页面控制器的下一页，beleow是我的代码，它对前3个有效，在前3个后停止调用

此按钮的点击代码位于5个视图控制器中，并且在每个1..5中设置了pageIndex

   weak var delegate: NextDelegate?

    nextBtn.rx.tap.asDriver().drive(onNext: {
        guard let delegate = self.delegate else {return}
        delegate.next(pageIndex: 1)
    }).disposed(by: disposeBag)

    backBtn.rx.tap.asDriver().drive(onNext: {
        guard let delegate = self.delegate else {return}
        delegate.previous(pageIndex: 1)
    }).disposed(by: disposeBag)

我的协议和方法

lazy var controllers: [UIViewController] = {
        let locVC = LocationVC()
        locVC.delegate = self
        let typeVC = TypeVC()
        typeVC.delegate = self
        let descVC = DescVC()
        descVC.delegate = self
        let priceVC = PriceVC()
        descVC.delegate = self
        let featuresVC = FeaturesVC()
        featuresVC.delegate = self
        let picturesVC = PicturesVC()
        picturesVC.delegate = self
        return [locVC,
                typeVC, descVC, priceVC, featuresVC, picturesVC]
    }()


func backBtnClicked(index: Int) {

    guard index - 1 >= 0 else { return }
    pageController.setViewControllers([controllers[index - 1]], direction: .reverse, animated: false, completion: nil)
}

func nextBtnClicked(index: Int) {
    log("\(controllers.count)", .happy)
    guard index + 1 < controllers.count else { return }
    pageController.setViewControllers([controllers[index + 1]], direction: .forward, animated: false, completion: nil)

}

extension ViewController: NextDelegate {
    func next(pageIndex: Int) {
        print("nexteddddd \(pageIndex)")
        nextBtnClicked(index: pageIndex)
    }

    func previous(pageIndex: Int) {
        print("backedddd \(pageIndex)")
        backBtnClicked(index: pageIndex)
    }
}

protocol NextDelegate: AnyObject {
    func next(pageIndex: Int)
    func previous(pageIndex: Int)
}

Answer 1

问题可能与您在此处设置静态索引1的事实有关

nextBtn.rx.tap.asDriver().drive(onNext: {
    guard let delegate = self.delegate else {return}
    delegate.next(pageIndex: 1)
}).disposed(by: disposeBag)

backBtn.rx.tap.asDriver().drive(onNext: {
    guard let delegate = self.delegate else {return}
    delegate.previous(pageIndex: 1)
}).disposed(by: disposeBag)

相反，您需要在每个vc中都有一个索引var，并在实例化vc时对其进行分配，以便可以在上方使用它，也可以在主寻呼机中使用vaibale

修复

var current = 0 // assuming you set first vc initially 

 nextBtn.rx.tap.asDriver().drive(onNext: {
    guard let delegate = self.delegate else {return}
    delegate.next(pageIndex:self.current)
}).disposed(by: disposeBag)

backBtn.rx.tap.asDriver().drive(onNext: {
    guard let delegate = self.delegate else {return}
    delegate.previous(pageIndex:self.current)
}).disposed(by: disposeBag)


func backBtnClicked(index: Int) {

    guard index - 1 >= 0 else { return }
    self.current = index - 1
    pageController.setViewControllers([controllers[index - 1]], direction: .reverse, animated: false, completion: nil)
}

func nextBtnClicked(index: Int) {
    log("\(controllers.count)", .happy)
    guard index + 1 < controllers.count else { return }
    self.current = index + 1
    pageController.setViewControllers([controllers[index + 1]], direction: .forward, animated: false, completion: nil)

}

代表不再被称为swift

1 个答案: