带子ViewControllers

Question

我是iOS新手，目前有3个视图，想要使用滑动手势在它们之间导航。刷卡工作。红色bg视图首先按照我想要的方式加载，并且滑动效果很好，但是点击“下一步”按钮不会做任何事情。有人可以给我一个提示吗？我正在接近这个错误，但似乎无法在谷歌找到任何帮助

在我的项目中，我有一个处理UIPageViewController的MemberCardViewController：

class MemberCardViewController: UIPageViewController, UIPageViewControllerDataSource, UIPageViewControllerDelegate {

    lazy var viewArray: [UIViewController] = {

        return [self.ViewControllerInstance(name: "CalendarView"),
                self.ViewControllerInstance(name: "IdCardView"),
                self.ViewControllerInstance(name: "MemberInfoView")]
    }()

    private func ViewControllerInstance(name: String) -> UIViewController {
        return UIStoryboard(name: "MemberCardViewController", bundle: nil).instantiateViewController(withIdentifier: name)
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        self.dataSource = self
        self.delegate = self
        loadViewController(viewPosition: 1)
    }

    func loadViewController(viewPosition: Int) {
        if let viewController = viewArray.get(at: viewPosition) {
            setViewControllers([viewController], direction: .forward, animated: true, completion: nil)
        }
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}
...

目前，我还创建了一个与Id卡相对应的IdCardViewController（红色背景视图）

class IdCardViewController: UIViewController {

    var pvc = MemberCardViewController()

    @IBAction func loadRight(_ sender: Any) {
        pvc.loadViewController(viewPosition: 2)
    }
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}

我现在面临的问题是，当在Id卡中单击“下一步”按钮时，我想加载“成员信息”视图，但现在点击它时没有任何反应。但是，我在MemberCardViewController的loadViewController()方法中设置断点，并且可以看到应用在单击按钮时到达它，但视图不会更改为Member Info。

Answer 1

您没有为pvc的{​​{1}}变量分配任何内容。因此，当您实例化IdCardViewController的实例时，您应该将IdCardViewController对象分配给MemberCardViewController变量。祝你好运！

修改

更改

pvc

到

private func ViewControllerInstance(name: String) -> UIViewController {
        return UIStoryboard(name: "MemberCardViewController", bundle: nil).instantiateViewController(withIdentifier: name)
    }

这里做的是，在实例化private func ViewControllerInstance(name: String) -> UIViewController { if name == "IdCardView" { if let vc = UIStoryboard(name: "MemberCardViewController", bundle: nil).instantiateViewController(withIdentifier: name) as? IdCardViewController { vc.pvc = self return vc } } return UIStoryboard(name: "MemberCardViewController", bundle: nil).instantiateViewController(withIdentifier: name) } 的实例后，IdCardViewController的对象（在这种情况下为MemberCardViewController）被分配给self变量。此外，要使此代码起作用，您必须为＆＃34; Id卡＆＃34;分配正确的类。在故事板中查看控制器。为此，请选择＆＃34; Id Card＆＃34;在故事板中查看控制器的对象，并在＆＃34; Identity Inspector＆＃34;中将其更改为pvc。 希望这有帮助！