88
99import UIKit
1010
11- private class Keyboard {
11+ internal class Keyboard {
1212 static let shared = Keyboard ( )
1313 var currentHeight : CGFloat = 0
1414}
@@ -17,7 +17,7 @@ extension UIView {
1717 private enum AssociatedKeys {
1818 static var keyboardLayoutGuide = " keyboardLayoutGuide "
1919 }
20-
20+
2121 /// A layout guide representing the inset for the keyboard.
2222 /// Use this layout guide’s top anchor to create constraints pinning to the top of the keyboard.
2323 public var keyboardLayoutGuide : KeyboardLayoutGuide {
@@ -38,14 +38,14 @@ open class KeyboardLayoutGuide: UILayoutGuide {
3838 updateButtomAnchor ( )
3939 }
4040 }
41-
41+
4242 private var bottomConstraint : NSLayoutConstraint ?
43-
43+
4444 @available ( * , unavailable)
4545 public required init ? ( coder aDecoder: NSCoder ) {
4646 fatalError ( " init(coder:) has not been implemented " )
4747 }
48-
48+
4949 public init ( notificationCenter: NotificationCenter = NotificationCenter . default) {
5050 super. init ( )
5151 // Observe keyboardWillChangeFrame notifications
@@ -56,7 +56,7 @@ open class KeyboardLayoutGuide: UILayoutGuide {
5656 object: nil
5757 )
5858 }
59-
59+
6060 internal func setUp( ) {
6161 guard let view = owningView else { return }
6262 NSLayoutConstraint . activate (
@@ -68,25 +68,25 @@ open class KeyboardLayoutGuide: UILayoutGuide {
6868 )
6969 updateButtomAnchor ( )
7070 }
71-
71+
7272 func updateButtomAnchor( ) {
7373 if let bottomConstraint = bottomConstraint {
7474 bottomConstraint. isActive = false
7575 }
76-
76+
7777 guard let view = owningView else { return }
78-
78+
7979 let viewBottomAnchor : NSLayoutYAxisAnchor
8080 if #available( iOS 11 . 0 , * ) , usesSafeArea {
8181 viewBottomAnchor = view. safeAreaLayoutGuide. bottomAnchor
8282 } else {
8383 viewBottomAnchor = view. bottomAnchor
8484 }
85-
85+
8686 bottomConstraint = bottomAnchor. constraint ( equalTo: viewBottomAnchor)
8787 bottomConstraint? . isActive = true
8888 }
89-
89+
9090 @objc
9191 private func keyboardWillChangeFrame( _ note: Notification ) {
9292 if var height = note. keyboardHeight {
@@ -98,7 +98,7 @@ open class KeyboardLayoutGuide: UILayoutGuide {
9898 Keyboard . shared. currentHeight = height
9999 }
100100 }
101-
101+
102102 private func animate( _ note: Notification ) {
103103 if
104104 let owningView = self . owningView,
0 commit comments