setObjectForKey: object cannot be nil when using TLIT on a CollectionView with a custom layout about tlindexpathtools HOT 4 CLOSED

I found this very relevant Radar report. The report says that one of the ways to reproduce this problem is:

1. Set a header size in UICollectionView, but don't provide a supplementary view
2. Invoke -performBatchUpdates with an empty block

But I haven't set any headers. Sure, I didn't provide an implementation to collectionView:viewForSupplementaryElementOfKind:atIndexPath:

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TLCollectionViewController has a default implementation of viewForSupplementaryElementOfKind. If you're subclassing this, check and see if it's returning nil. Other than this, TLIT has no connection with supplementary views.

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This seems done.

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Ya thanks for the info. I didn't think it was a problem with TLIT but I couldn't be sure, as the errors always look like they go through TLIT. I think the danger is that as a (very happy, I might add!) TLIT user, I expect things to 'just work' — and when it doesn't it's very surprising and it's hard to pinpoint where the fault lies.

I've had to go with a [collectionView reloadData] workaround, if I remember correctly.

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