public async override void LayoutSubviews()
{
base.LayoutSubviews();
// set correct page width
if (pageWidth == -1)
{
pageWidth = Bounds.Width;
}
// simulate end of scrollView at right
// condition to avoid new creations of views
if (prevPageIndex >= rightIndexLimit)
{
prevPageIndex = PageIndex;
if (PageIndex > rightIndexLimit)
{
// disable user interaction
UserInteractionEnabled = false;
// animate scrollview to correct position
var offset = ContentOffset.X % pageWidth;
SetContentOffset(new CGPoint(ContentOffset.X - offset, ContentOffset.Y), true);
// wait for movement and enable user interaction
await Task.Delay(350);
UserInteractionEnabled = true;
}
return;
}
ContentSize = new CGSize(pageWidth * 20, Bounds.Height);
_containerView.Frame = new CGRect(0, 0, ContentSize.Width, ContentSize.Height);
RecenterIfNeeded();
// tile content in visible bounds
CGRect visibleBounds = ConvertRectToView(Bounds, _containerView);
nfloat minimumVisibleX = CGRectGetMinX(visibleBounds);
nfloat maximumVisibleX = CGRectGetMaxX(visibleBounds);
TileViews(minimumVisibleX, maximumVisibleX);
if (prevPageIndex != PageIndex)
{
prevPageIndex = PageIndex;
if (OnChangePage != null)
{
OnChangePage.Invoke(this, new EventArgs());
}
}
}
public void RefreshVisibleView()
{
if (Dragging)
{
return;
}
var currentView = pages.Find(v => v.Frame.X.CompareTo(ContentOffset.X) == 0);
var center = currentView.Center;
TView newView = InsertView();
var offSetY = ContentSize.Height;
var frame = currentView.Frame;
frame.Y += offSetY;
newView.Frame = frame;
UIView.Animate(0.6, 0.4, UIViewAnimationOptions.CurveEaseIn, () => { currentView.Alpha = 0.25f; }, null);
UIView.Animate(0.7, 0.5, UIViewAnimationOptions.CurveEaseIn,
() => {
currentView.Transform = CGAffineTransform.MakeScale(0.75f, 0.75f);
currentView.Center = new CGPoint(center.X, center.Y + 105);
}, null);
UIView.Animate(0.7, 0.6, UIViewAnimationOptions.CurveEaseInOut,
() => {
newView.Center = center;
}, () => {
foreach (var item in pages)
{
viewSource.Dispose(item);
item.RemoveFromSuperview();
}
pages.Clear();
pages.Add(newView);
if (OnChangePage != null)
{
OnChangePage.Invoke(this, new EventArgs());
}
});
}
