Question

我正在使用UIPageViewController，我的意图是在单击UIButton中的一个UIViewController时单击以切换当前视图。我已经在我的问题上进行了搜索，并找到了一些类似的主题，但是我无法做出正确的答案。

例如，我第二个UIViewController vc2中的按钮应将视图更改为vc3。

RootPageViewController

import UIKit

class RootPageViewController: UIPageViewController, UIPageViewControllerDataSource {

    lazy var viewControllerList:[UIViewController] = {

        let sb = UIStoryboard(name: "Main", bundle: nil)

        let vc1 = sb.instantiateViewController(withIdentifier: "timelineView")
        let vc2 = sb.instantiateViewController(withIdentifier: "mainView")
        let vc3 = sb.instantiateViewController(withIdentifier: "addView")

        return [vc1, vc2, vc3]
    }()

    override func viewDidLoad() {
        super.viewDidLoad()

        self.dataSource = self

        let secondViewController = viewControllerList[1]
        self.setViewControllers([secondViewController], direction: .forward, animated: false, completion: nil)

    }

    func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
        guard let vcIndex = viewControllerList.firstIndex(of: viewController) else { return nil }

        let previousIndex = vcIndex - 1
        guard previousIndex >= 0 else { return nil }

        guard viewControllerList.count > previousIndex else { return nil }

        return viewControllerList[previousIndex]
    }

    func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {
        guard let vcIndex = viewControllerList.firstIndex(of: viewController) else { return nil }

        let nextIndex = vcIndex + 1

        guard viewControllerList.count != nextIndex else { return nil }

        guard viewControllerList.count > nextIndex else { return nil }

        return viewControllerList[nextIndex]
    }

}

第二个ViewController内部的按钮

@IBAction func addData(_ sender: Any) {


    }

Answer 1

在RootPageViewController的{{1}}中，将第二个视图控制器按钮的目标添加到viewDidLoad，并将self方法添加到addData。您可以使用RootPageViewController并使用该方法移至最后一个视图控制器

setViewControllers

OR

在MainViewControlle中保留addData方法，并向其添加协议

override func viewDidLoad() {
    super.viewDidLoad()

    self.dataSource = self
    if let secondViewController = viewControllerList[1] as? SecondViewController {
        self.setViewControllers([secondViewController], direction: .forward, animated: false, completion: nil)
        secondViewController.button.action = #selector(addData(_:))
    }
}
@IBAction func addData(_ sender: Any) {
    if let thirdViewController = viewControllerList.last {
        self.setViewControllers([thirdViewController], direction: .forward, animated: false, completion: nil)
    }
}

在RootPageViewController中确认此委托并添加委托方法

protocol MainVCDelegate {
    func buttonPlusTapped()
}
class MainViewController: UIViewController {

    @IBOutlet var buttonPlus: UIBarButtonItem!

    var delegate: MainVCDelegate?
    @IBAction func addData(_ sender: Any) {
        delegate?.buttonPlusTapped()
    }
}

Swift-更改按钮上的UIPageViewController视图

1 个答案: