Question

我想在每次出现floatingViewController时隐藏一个FabButton，并在关闭视图时再次显示它。

我尝试用

隐藏FabButton本身

class FileObject
{
   var path:String
   init(_ path:String)
   { self.path = path }
}

var files:[FileObject] = 
  [
    FileObject("./b/c.ext"),
    FileObject("./f.ext"),
    FileObject("./g.ext"),
    FileObject("./a/a.ext"),
    FileObject("./b/b.ext"),
    FileObject("./b/d/d.ext"),
    FileObject("./c/e.ext")
  ]

files = files.map({ ($0, $0.path.rangeOfString("/", options: .BackwardsSearch)!) })
             .map({ ($0, $0.path.stringByReplacingCharactersInRange($1, withString: "/ ")) })
             .map({ ($0, $1.lowercaseString) })
             .sort({ $0.1 < $1.1 })
             .map({  $0.0 })


files.forEach({ print($0.path) })

// prints:
//
// ./f.ext
// ./g.ext
// ./a/a.ext
// ./b/b.ext
// ./b/c.ext
// ./b/d/d.ext
// ./c/e.ext

// Benchmark for 8000 gives 0.134 sec.

但是当我关闭floatingViewController时没有回调函数，所以我没有办法取消隐藏它。

我也尝试手动设置zPosition，但按钮不受影响

有更好的方法吗？

Answer 1

NavigationBarViewController具有用于检测floatingViewController状态的委托方法。设置委托对象

navigationBarViewController?.delegate = self

然后尝试委托方法：

extension AppNavigationBarViewController: NavigationBarViewControllerDelegate {
    /// Delegation method that executes when the floatingViewController will open.
func navigationBarViewControllerWillOpenFloatingViewController(navigationBarViewController: NavigationBarViewController) {
    print("Will Open")
}

    /// Delegation method that executes when the floatingViewController will close.
func navigationBarViewControllerWillCloseFloatingViewController(navigationBarViewController: NavigationBarViewController) {
    print("Will Close")
}

    /// Delegation method that executes when the floatingViewController did open.
func navigationBarViewControllerDidOpenFloatingViewController(navigationBarViewController: NavigationBarViewController) {
    print("Did Open")
}

    /// Delegation method that executes when the floatingViewController did close.
func navigationBarViewControllerDidCloseFloatingViewController(navigationBarViewController: NavigationBarViewController) {
    print("Did Close")
}

}

您应该能够使用这些方法来达到预期的效果。

Answer 2

将此方法添加到FloatingViewController类

override func viewWillDisappear(animated: Bool) {
  let vc = ...assign to the viewcontroller that holds tour menu button 
  vc.menuButton.hidden = false
}

出现floatingViewController时隐藏FabButton。 Cosmicmind /材料

2 个答案: