将一个 ViewController 部分呈现在另一个之上

Question

我有一个 MapViewController，它基本上是一个 MKMapView，并显示带有自定义注释的地图。

现在，我正尝试从底部展示另一个 ViewController，其中包含用户可以在旅途中使用的额外过滤器。

但是我运行遇到了一个问题，当我将新的 FilterMenuViewController 作为 MapViewController 的子项呈现时，MapViewController 消失了。

这是它的样子：

Initial state

Button to present new controller tapped

New controller presented but the MapViewController disappearing

负责交互的代码如下：

MapViewController 变量声明：

var filterMenuVC = FilterMenuViewController()
var isFilterMenuOpened = false

MapViewController viewDidLoad():

    filterMenuVC = storyboard?.instantiateViewController(withIdentifier: "FilterMenuViewController") as! FilterMenuViewController

MapViewController showFilterMenu 按钮操作：

@IBAction func showFilterMenu(_ sender: UIButton) {
    // Presents the filter menu
    if isFilterMenuOpened == true {
        isFilterMenuOpened = false
        filterMenuVC.willMove(toParentViewController: nil)
        filterMenuVC.view.removeFromSuperview()
        filterMenuVC.removeFromParentViewController()
    } else if isFilterMenuOpened == false {
        isFilterMenuOpened = true
        self.addChildViewController(filterMenuVC)
        self.view.addSubview(filterMenuVC.view)
        filterMenuVC.didMove(toParentViewController: self)
    }
}

Answer 1

问题是我创建了一个从按钮到 ViewController 的 segue "show"，这与将控制器添加到当前视图发生冲突，它推入了它，而 MapViewController 已解除分配。

所以我刚刚从 sotryboard 中删除了 segue 并以编程方式添加了 child，它现在就像魅力一样。

这是一个愚蠢的错误，但也许这会对遇到同样问题的人有所帮助:)

Answer 2

试试这个，视图从顶部和背面显示，这是图像：https://imgur.com/a/gzIGjEa

if isFilterMenuOpened{
            if let searching = self.childViewControllers.first as? ViewController{
                UIView.animate(withDuration: 0.7, animations: {
                    searching.view.frame = CGRect.init(x: 0,
                                                       y: self.view.frame.origin.y-308,
                                                       width: self.view.frame.size.width,
                                                       height: 308)
                }, completion: {(boos) in
                    searching.removeFromParentViewController()
                    searching.dismiss(animated: true, completion: nil)
                    self.isFilterMenuOpened = false
                })
            }
        }else{
            let search = self.storyboard?.instantiateViewController(withIdentifier: "searchView") as! ViewController
            search.view.frame = CGRect.init(x: 0, y: self.view.frame.origin.y-308, width: self.view.frame.size.width, height: 308) //The View controller height same size of your view in storyboard
            search.delegateSearch = self
            self.addChildViewController(search)
            UIView.animate(withDuration: 0.5, animations: {
                search.view.frame = CGRect.init(x: 0, y: self.view.frame.origin.y, width: self.view.frame.size.width, height: 308)
            })
            self.view.addSubview(search.view)
            self.didMove(toParentViewController: search)
            isFilterMenuOpened = true
        }

将一个 ViewController 部分呈现在另一个之上

Presenting one ViewController over another partially

ios

swift

view

uikit

subview