我正在使用 UIPageViewController
,我的目的是在其 UIViewController
之一中单击 UIButton
时切换当前 View 。我已经用 google 搜索了我的问题并找到了一些类似的线索,但我无法确定答案。
例如,我的第二个 UIViewController
vc2
中的按钮应将 View 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 内的按钮
@IBAction func addData(_ sender: Any) {
}
最佳答案
在 RootPageViewController
的 viewDidLoad
中,将第二个 View Controller 按钮的目标添加到 self
并将 addData
方法添加到 RootPageViewController
。您可以使用 setViewControllers
并移动到该方法中的最后一个 View Controller
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)
}
}
或
在 MainViewControlle 中保留 addData 方法,并像这样向其添加协议(protocol)
protocol MainVCDelegate {
func buttonPlusTapped()
}
class MainViewController: UIViewController {
@IBOutlet var buttonPlus: UIBarButtonItem!
var delegate: MainVCDelegate?
@IBAction func addData(_ sender: Any) {
delegate?.buttonPlusTapped()
}
}
在 RootPageViewController 中确认这个委托(delegate)并添加委托(delegate)方法
class RootPageViewController: UIPageViewController, UIPageViewControllerDataSource, MainVCDelegate {
func buttonPlusTapped() {
if let thidViewController = viewControllerList.last {
self.setViewControllers([thidViewController], direction: .forward, animated: false, completion: nil)
}
}
lazy var viewControllerList:[UIViewController] = {
let sb = UIStoryboard(name: "Main", bundle: nil)
let vc1 = sb.instantiateViewController(withIdentifier: "timelineView")
let vc2 = sb.instantiateViewController(withIdentifier: "mainView") as! MainViewController
vc2.delegate = self
let vc3 = sb.instantiateViewController(withIdentifier: "addView")
return [vc1, vc2, vc3]
}()
}
关于ios - Swift - 单击按钮更改 UIPageViewController View ,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/55847188/