當floatingViewController出現時隱藏FabButton。 Cosmicmind /材質

Question

我想在每次出現floatingViewController時隱藏FabButton，並在關閉視圖時再次顯示它。

我試圖隱藏FabButton本身

self.menuButton.hidden = true 

但沒有一個回調函數，當我關閉floatingViewController所以我沒有辦法取消隱藏它。

我也嘗試手動設置z位置，但按鈕不受影響

是否有這更好的方法呢？

Answer 1

NavigationBarViewController具有用於檢測floatingViewController狀態的委派方法。將委託對象，

navigationBarViewController?.delegate = self 

然後嘗試委託方法：

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") 
} 

}

您應該能夠使用這些方法來達到預期的效果。

Answer 2

此方法添加到FloatingViewController類

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