public ChatInputKeyboardDelegate(ChatInputView chatInputView)
{
_chatInputView = new WeakReferenceEx <ChatInputView>(chatInputView);
_willShowObserver = NSNotificationCenter.DefaultCenter.AddObserver(UIKeyboard.WillShowNotification, (notification) =>
{
if (!KeyBoardOpened)
{
TryInvokeOpenKeyboardEvent(notification);
}
});
_willHideObserver = NSNotificationCenter.DefaultCenter.AddObserver(UIKeyboard.WillHideNotification, (notification) =>
{
if (KeyBoardOpened)
{
KeyBoardOpened = false;
KeyboardHeightChanged?.Invoke(0);
}
});
_willChangeFrameObserver = NSNotificationCenter.DefaultCenter.AddObserver(UIKeyboard.WillChangeFrameNotification, (notification) =>
{
if (KeyBoardOpened)
{
TryInvokeOpenKeyboardEvent(notification);
}
});
}
internal static void Init(IKeyboardEvents platformImplementation)
{
implementation = platformImplementation;
implementation.KeyboardHeightChanged += (double height) => {
KeyboardHeightChanged?.Invoke(height);
};
}
private void TryInvokeOpenKeyboardEvent(NSNotification notification)
{
var keyboardHeight = UIKeyboard.FrameEndFromNotification(notification).Height;
if (_chatInputView.Target?.Frame.Height < keyboardHeight)
{
KeyBoardOpened = true;
}
KeyboardHeightChanged?.Invoke(keyboardHeight);
}
public KeyboardUtils()
{
var windowHeight = UIScreen.MainScreen.Bounds.Height;
// Show or change frame
NSNotificationCenter.DefaultCenter.AddObserver(
UIKeyboard.WillChangeFrameNotification, (notify) => {
var info = notify.UserInfo;
var value = (NSValue)(info [UIKeyboard.FrameEndUserInfoKey]);
var height = windowHeight - value.RectangleFValue.Y;
Debug.WriteLine("KeyboardEvents, height={0}", height);
KeyboardHeightChanged?.Invoke(height);
});
}
