public static void TPKeyboardAvoiding_updateContentInset(this UIScrollView scrollView)
{
//TPKeyboardAvoidingState state = KeyboardAvoidingState ();
if (State == null)
{
State = new TPKeyboardAvoidingState();
}
if (State.keyboardVisible)
{
scrollView.ContentInset = scrollView.TPKeyboardAvoiding_contentInsetForKeyboard();
}
}
public static UIEdgeInsets TPKeyboardAvoiding_contentInsetForKeyboard(this UIScrollView scrollView)
{
//TPKeyboardAvoidingState state = KeyboardAvoidingState();
if (State == null)
{
State = new TPKeyboardAvoidingState();
}
UIEdgeInsets newInset = scrollView.ContentInset;
CGRect keyboardRect = State.keyboardRect;
newInset.Bottom = (nfloat)(keyboardRect.Size.Height - Math.Max((keyboardRect.GetMaxY() - scrollView.Bounds.GetMaxY()), 0));
return(newInset);
}
public static void TPKeyboardAvoiding_updateFromContentSizeChange(this UIScrollView scrollView)
{
//TPKeyboardAvoidingState state = KeyboardAvoidingState ();
if (State == null)
{
State = new TPKeyboardAvoidingState();
}
if (State.keyboardVisible)
{
State.priorContentSize = scrollView.ContentSize;
scrollView.ContentInset = scrollView.TPKeyboardAvoiding_contentInsetForKeyboard();
}
}
public static void TPKeyboardAvoiding_keyboardWillHide(this UIScrollView scrollView, NSNotification notification)
{
CGRect keyboardRect = scrollView.ConvertRectFromView((notification.UserInfo.ObjectForKey(UIKeyboard.FrameEndUserInfoKey) as NSValue).CGRectValue, null);
if (keyboardRect == CGRect.Empty)
{
return;
}
//TPKeyboardAvoidingState state = KeyboardAvoidingState();
if (State == null)
{
State = new TPKeyboardAvoidingState();
}
if (!State.keyboardVisible)
{
return;
}
State.keyboardRect = new CGRect(0, 0, 0, 0);
State.keyboardVisible = false;
// Restore dimensions to prior size
//TODO : add animations
UIView.BeginAnimations(null);
UIView.SetAnimationCurve(UIViewAnimationCurve.EaseIn);
UIView.SetAnimationDuration(1.0);
if (scrollView is TPKeyboardAvoidingScrollView)
{
scrollView.ContentSize = State.priorContentSize;
}
scrollView.ContentInset = State.priorInset;
scrollView.ScrollIndicatorInsets = State.priorScrollIndicatorInsets;
scrollView.PagingEnabled = State.priorPagingEnabled;
scrollView.LayoutIfNeeded();
UIView.CommitAnimations();
}
public static void TPKeyboardAvoiding_scrollToActiveTextField(this UIScrollView scrollView)
{
//TPKeyboardAvoidingState state = KeyboardAvoidingState ();
if (State == null)
{
State = new TPKeyboardAvoidingState();
}
if (!State.keyboardVisible)
{
return;
}
nfloat visibleSpace = scrollView.Bounds.Size.Height - scrollView.ContentInset.Top - scrollView.ContentInset.Bottom;
CGPoint idealOffset = new CGPoint(0, scrollView.TPKeyboardAvoiding_idealOffsetForViewwithViewingAreaHeight(scrollView.TPKeyboardAvoiding_findFirstResponderBeneathView(scrollView), visibleSpace));
DispatchQueue.CurrentQueue.DispatchAfter(DispatchTime.Now, () =>
{
scrollView.SetContentOffset(idealOffset, true);
});
}
/*static TPKeyboardAvoidingState KeyboardAvoidingState()
* {
* TPKeyboardAvoidingState state = State;
* if(state == null)
* state = new TPKeyboardAvoidingState();
*
* return state;
* }*/
public static void TPKeyboardAvoiding_keyboardWillShow(this UIScrollView scrollView, NSNotification notification)
{
CGRect keyboardRect = scrollView.ConvertRectFromView((notification.UserInfo.ObjectForKey(UIKeyboard.FrameEndUserInfoKey) as NSValue).CGRectValue, null);
if (keyboardRect == CGRect.Empty)
{
return;
}
//TPKeyboardAvoidingState state = KeyboardAvoidingState();
if (State == null)
{
State = new TPKeyboardAvoidingState();
}
UIView firstResponder = scrollView.TPKeyboardAvoiding_findFirstResponderBeneathView(scrollView);
if (firstResponder == null)
{
return;
}
State.keyboardRect = keyboardRect;
if (!State.keyboardVisible)
{
State.priorInset = scrollView.ContentInset;
State.priorScrollIndicatorInsets = scrollView.ScrollIndicatorInsets;
State.priorPagingEnabled = scrollView.PagingEnabled;
}
State.keyboardVisible = true;
scrollView.PagingEnabled = false;
if (scrollView is TPKeyboardAvoidingScrollView)
{
State.priorContentSize = scrollView.ContentSize;
if (CGSize.Equals(scrollView.ContentSize, new CGSize(0, 0)))
{
// Set the content size, if it's not set. Do not set content size explicitly if auto-layout
// is being used to manage subviews
scrollView.ContentSize = scrollView.TPKeyboardAvoiding_calculatedContentSizeFromSubviewFrames();
}
}
// Shrink view's inset by the keyboard's height, and scroll to show the text field/view being edited
//TODO : need fix
UIView.BeginAnimations(null);
NSNumber number = notification.UserInfo.ValueForKey(UIKeyboard.AnimationCurveUserInfoKey) as NSNumber;
UIView.SetAnimationCurve((UIViewAnimationCurve)number.Int32Value);
number = notification.UserInfo.ValueForKey(UIKeyboard.AnimationDurationUserInfoKey) as NSNumber;
UIView.SetAnimationDuration(number.FloatValue);
// UIView.SetAnimationCurve (UIViewAnimationCurve.EaseIn);
// UIView.SetAnimationDuration (1.0);
scrollView.ContentInset = scrollView.TPKeyboardAvoiding_contentInsetForKeyboard();
nfloat viewableHeight = scrollView.Bounds.Size.Height - scrollView.ContentInset.Top - scrollView.ContentInset.Bottom;
scrollView.SetContentOffset(new CGPoint(scrollView.ContentOffset.X, (nfloat)scrollView.TPKeyboardAvoiding_idealOffsetForViewwithViewingAreaHeight(firstResponder, viewableHeight)), false);
scrollView.ScrollIndicatorInsets = scrollView.ContentInset;
scrollView.LayoutIfNeeded();
UIView.CommitAnimations();
}