我有一个导航栏和一个 Collection View 以编程方式添加到我的应用程序中,我也在尝试添加一个自定义 View 。我已经让 View 位于 Collection View 上方和导航栏下方,这是我想要的,但是,在 iOS 11 上,导航栏的高度会发生变化,具体取决于您是否向下拉伸(stretch) Collection View 。我也想让 View 向下移动,以便 Collection View 和导航栏之间没有空白,因为我的自定义 View 不会进一步向下移动,因为 View 的 safeInsets 不会更改。它将向上移动到折叠标题,这不是问题。
override func viewDidLoad() {
super.viewDidLoad()
navigationItem.title = "Home"
navigationController?.navigationBar.prefersLargeTitles = true
collectionView?.backgroundColor = UIColor.white
collectionView?.translatesAutoresizingMaskIntoConstraints = false
//collectionView?.contentInset = UIEdgeInsets(top: 50, left: 0, bottom: 0, right: 0)
//collectionView?.scrollIndicatorInsets = UIEdgeInsets(top: 50, left: 0, bottom: 0, right: 0)
collectionView?.register(StockCell.self, forCellWithReuseIdentifier: "cellid")
setupMenuBar()
}
let menuBar: MenuBar = {
let mb = MenuBar()
mb.translatesAutoresizingMaskIntoConstraints = false
mb.backgroundColor = .black
return mb
}()
private func setupMenuBar() {
view.addSubview(menuBar)
NSLayoutConstraint.activate([
(collectionView?.topAnchor.constraint(equalTo: menuBar.bottomAnchor))!,
(collectionView?.widthAnchor.constraint(equalTo: view.widthAnchor))!,
(collectionView?.bottomAnchor.constraint(equalTo: view.bottomAnchor))!,
menuBar.heightAnchor.constraint(equalToConstant: 50),
menuBar.widthAnchor.constraint(equalTo: view.widthAnchor, multiplier: 1),
menuBar.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor)
])
}
This is the starting screen, showing the view in its resting position
This is the navigation bar overlapping the view, which is what I want to fix
最佳答案
您可以将自定义菜单 View 的底部 anchor 约束到导航栏的底部 anchor ;这样,菜单 View 将始终保持相同的垂直偏移(不过您可能必须熟悉其他一些约束):
navigationController!.navigationBar.bottomAnchor.constraint(equalTo: menuBar.bottomAnchor)
参见 this answer一个扩展的例子。
关于ios - 如何将 UIView 固定在 iOS 11 NavigationBar 不断变化的高度框架下方?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/48718086/