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[iOS] Implement item move on iOS CollectionView #4863

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merged 2 commits into from Jan 7, 2019
Merged

[iOS] Implement item move on iOS CollectionView #4863

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c48f271
Implement item move on iOS CollectionView
hartez Dec 26, 2018
9cba2b0
Remove private modifier
hartez Dec 27, 2018
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10 changes: 9 additions & 1 deletion Xamarin.Forms.Platform.iOS/CollectionView/ObservableItemsSource.cs
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Expand Up @@ -21,7 +21,6 @@ public ObservableItemsSource(IEnumerable itemSource, UICollectionView collection

void CollectionChanged(object sender, NotifyCollectionChangedEventArgs args)
{
// TODO hartez 2018/07/31 16:02:50 Handle the rest of these cases (implementing selection will make them much easier to test)
switch (args.Action)
{
case NotifyCollectionChangedAction.Add:
Expand All @@ -33,6 +32,7 @@ void CollectionChanged(object sender, NotifyCollectionChangedEventArgs args)
case NotifyCollectionChangedAction.Replace:
break;
case NotifyCollectionChangedAction.Move:
Move(args);
break;
case NotifyCollectionChangedAction.Reset:
break;
Expand All @@ -41,6 +41,14 @@ void CollectionChanged(object sender, NotifyCollectionChangedEventArgs args)
}
}

void Move(NotifyCollectionChangedEventArgs args)
{
var oldPath = NSIndexPath.Create(0, args.OldStartingIndex);
var newPath = NSIndexPath.Create(0, args.NewStartingIndex);

_collectionView.MoveItem(oldPath, newPath);
}

static NSIndexPath[] CreateIndexesFrom(int startIndex, int count)
{
var result = new NSIndexPath[count];
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