委托停止被调用 swift
Delegate stops being called swift
我有一个委托,用于触发网页浏览控制器的下一页,我有 6 个 viewcontroller 附加到页面 viewcontroller。在 3 个不同的控制器中的前 3 个调用之后,委托停止被调用,因此,页面控制器的下一个页面没有被触发,下面是我的代码,它适用于前 3 个,并在前 3[=13 之后停止调用=]
此按钮点击代码在 viewcontroller 中的 5 个中,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)
}
问题可能与您在此处设置的静态索引 1 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,你需要在每个 vc 中有一个索引变量,并在实例化 vc 时分配它,这样你就可以在上面使用它或在主寻呼机中使用 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)
}
我有一个委托,用于触发网页浏览控制器的下一页,我有 6 个 viewcontroller 附加到页面 viewcontroller。在 3 个不同的控制器中的前 3 个调用之后,委托停止被调用,因此,页面控制器的下一个页面没有被触发,下面是我的代码,它适用于前 3 个,并在前 3[=13 之后停止调用=]
此按钮点击代码在 viewcontroller 中的 5 个中,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)
}
问题可能与您在此处设置的静态索引 1 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,你需要在每个 vc 中有一个索引变量,并在实例化 vc 时分配它,这样你就可以在上面使用它或在主寻呼机中使用 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)
}