public override UICollectionViewCell GetCell(UICollectionView collectionView, NSIndexPath indexPath)
{
var cell = collectionView.DequeueReusableCell(TabCollectionCell.cellIdentifier(), indexPath) as TabCollectionCell;
configureCell(cell, indexPath: indexPath, tabView);
return(cell);
}
public TabView(bool _isInfinity, TabPageOption _option) : base(CGRect.Empty)
{
option = _option;
isInfinity = _isInfinity;
NSBundle.FromClass(new ObjCRuntime.Class(typeof(TabView))).LoadNib(nameof(TabView), this, null);
AddSubview(contentView);
contentView.BackgroundColor = option.tabBackgroundColor.ColorWithAlpha(option.tabBarAlpha);
var top = NSLayoutConstraint.Create(contentView, NSLayoutAttribute.Top, NSLayoutRelation.Equal, this, NSLayoutAttribute.Top, 1.0f, 0.0f);
var left = NSLayoutConstraint.Create(contentView, NSLayoutAttribute.Leading, NSLayoutRelation.Equal, this, NSLayoutAttribute.Leading, 1.0f, 0.0f);
var bottom = NSLayoutConstraint.Create(this, NSLayoutAttribute.Bottom, NSLayoutRelation.Equal, contentView, NSLayoutAttribute.Bottom, 1.0f, 0.0f);
var right = NSLayoutConstraint.Create(this, NSLayoutAttribute.Trailing, NSLayoutRelation.Equal, contentView, NSLayoutAttribute.Trailing, 1.0f, 0.0f);
contentView.TranslatesAutoresizingMaskIntoConstraints = false;
this.AddConstraints(new NSLayoutConstraint[] { top, left, bottom, right });
var bundle = NSBundle.FromClass(new ObjCRuntime.Class(typeof(TabView)));
var nib = UINib.FromName(TabCollectionCell.cellIdentifier(), bundle);
collectionView.RegisterNibForCell(nib, TabCollectionCell.cellIdentifier());
cellForSize = nib.Instantiate(null, null).First() as TabCollectionCell;
collectionView.ScrollsToTop = false;
collectionView.DataSource = this;
collectionView.Delegate = this;
//collectionView.SetCollectionViewLayout(this, true);
collectionView.Delegate = this;
currentBarView.BackgroundColor = option.currentColor;
currentBarViewHeightConstraint.Constant = option.currentBarHeight;
if (!isInfinity)
{
currentBarView.RemoveFromSuperview();
collectionView.AddSubview(currentBarView);
collectionView.TranslatesAutoresizingMaskIntoConstraints = false;
var topOne = NSLayoutConstraint.Create(currentBarView, NSLayoutAttribute.Top, NSLayoutRelation.Equal, collectionView, NSLayoutAttribute.Top, 1.0f,
option.tabHeight - currentBarViewHeightConstraint.Constant);
var leftOne = NSLayoutConstraint.Create(currentBarView, NSLayoutAttribute.Leading, NSLayoutRelation.Equal, collectionView, NSLayoutAttribute.Leading, 1.0f, 0.0f);
currentBarViewLeftConstraint = leftOne;
collectionView.AddConstraints(new[] { topOne, leftOne });
}
bottomBarViewHeightConstraint.Constant = 1.0f / UIScreen.MainScreen.Scale;
}
public void configureCell(TabCollectionCell cell, NSIndexPath indexPath, TabView tabView)
{
var fixedIndex = tabView.isInfinity ? indexPath.Item % tabView.pageTabItemsCount : indexPath.Item;
cell.item = tabView.pageTabItems[fixedIndex];
cell.option = tabView.option;
cell.isCurrent = fixedIndex == (tabView.currentIndex % tabView.pageTabItemsCount);
cell.tabItemButtonPressedBlock = (arg1, arg2) =>
{
var direction = UIPageViewControllerNavigationDirection.Forward;
var pageTabItemsCount = arg1.pageTabItemsCount;
var currentIndex = arg1.currentIndex;
if (arg1.isInfinity)
{
if (indexPath.Item < pageTabItemsCount || indexPath.Item < currentIndex)
{
direction = UIPageViewControllerNavigationDirection.Reverse;
}
}
else
{
if (indexPath.Item < currentIndex)
{
direction = UIPageViewControllerNavigationDirection.Reverse;
}
}
arg1.pageItemPressedBlock(fixedIndex, direction);
if (arg2?.isCurrent == false)
{
arg1.updateCollectionViewUserInteractionEnabled(false);
}
arg1.updateCurrentIndexForTap((int)indexPath.Item);
};
}
