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根据选择的选项,为视图控制器呈现不同的视图:Swift 4

viewcontroller uiview swift iphone ios

Chandler Long · 技术社区 · 6 年前

我会尽力解释我的问题,所以提前谢谢你。

例如,如果在菜单栏上选择“设置”选项。我会被带到 选择控制器 并让selectionController继承名为

目前,我可以导航到我的设置控制器,并让导航栏代表选择的选项。但我该如何继承 设置视图 也?

家庭控制器

class HomeController: UIViewController {
    lazy var menu: Menu = {
        let menuLauncher = Menu()
        menuLauncher.homeController = self
        return menuLauncher
    }()

    override func viewDidLoad() {
        super.viewDidLoad()
        navigationItem.title = "Home"
            view.backgroundColor = Color.blue
            navigationItem.leftBarButtonItem = UIBarButtonItem(image: UIImage(named: "menu"), style: .plain, target: self, action: #selector(displayMenu))
    }

    func displayController(menuOption: MenuOption) {
        let selectionController = UIViewController()
        selectionController.navigationItem.title = menuOption.name
        selectionController.view.backgroundColor = Color.blue
        navigationController?.navigationBar.tintColor = UIColor.white
        navigationController?.pushViewController(selectionController, animated: true)
    }

    @objc func displayMenu() {
        menu.displayMenu()
    }
}

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return menuOptions.count
}

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: cellId, for: indexPath) as! MenuCell
    let menuOption = menuOptions[indexPath.row]
    cell.menuOption = menuOption
    return cell
}

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
    return CGSize(width: collectionView.frame.width, height: 30)
}

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    let menuOption = self.menuOptions[indexPath.row]
    print(menuOption.name)
    UIView.animate(withDuration: 0.5, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 1, options: .curveEaseOut, animations: {
        self.blackView.alpha = 0

        if let app = UIApplication.shared.delegate as? AppDelegate, let window = app.window {
            let width = window.frame.width - 150

            self.menuView.frame = CGRect(x: -width, y: 0, width: 0, height: window.frame.height)
        }

    }) { (completed: Bool) in


//THIS IS WHERE I CALL MY FUNCTION TO SET UP THE SELECTIONCONTROLLER
        self.homeController?.displayController(menuOption: menuOption)
    }
}

override init(frame: CGRect) {
    super.init(frame: frame)
    self.collectionView.delegate = self
    self.collectionView.dataSource = self
    collectionView.register(MenuCell.self, forCellWithReuseIdentifier: cellId)

    setUpView()
    setUpCollectionView()

}

选择一个选项(以索引路径的形式)后,以及菜单动画完成后。我在设置新的控制器。

如何实现视图?如果我选择了“设置”,如何让selectionController显示也?

2 回复 | 直到 6 年前

u84six 6 年前

可以将子视图添加到现有视图:

//The container view can be in the vc with constraints already setup.
//Or you can use the vc's default view.
enum MyView: Int { case settingsView = 0, otherView }

//Add view
let view = UIView(frame: containerView.bounds)
view.tag = MyView.settingsView.rawValue
containerView.addSubview(view)

//Remove view
if let remove = containerView.viewWithTag(MyView.settingsView.rawValue) {
    remove.removeFromSuperview()
}

Tony Lin 6 年前

我个人认为 ViewController 是个问题。它给了你一些额外的好处,比如生命周期控制,你可以利用这个视图。

一个很好的解释: https://stackoverflow.com/a/30459226/7591205

视图控制器 .

但如果你坚持要 View 为1 视图控制器