First animation broken when starting using a .grid layout

[Drusy]

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The first layout transition is broken if the first layout configuration is .grid

Report a bug

What did you do?

Update the example project with the following:

    fileprivate var layoutState: LayoutState = .grid

    fileprivate func setupCollectionView() {
        collectionView.collectionViewLayout = gridLayout
        // ...
    }

What did you expect to happen?

Proper animation for the layout transition

What happened instead?

The first animation is not smooth and flickers

Your Environment

• Version of the component: a02d5a1
• Swift version: 4.1
• iOS version: 11.2.6
• Device: Simulator iPhone X / iPhone 6Plus
• Xcode version: 9.3
• If you use Carthage: 0.29.0

Project that demonstrates the bug

Simply updating your example project with the code previously provided:

1. Update initial layout in the setupCollectionView method for a gridLayout.
2. Update the initial layoutState to .grid