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將UICollectionViewController的集合視圖中的前3個單元格的位置推到導航堆棧上之前,獲取其位置的最佳方法是什麼?如何在屏幕出現之前獲取UICollectionView中的單元格框架?
例如:
let collectionViewController = SomeCollectionViewControllerSubclass(data: someData)
// @ TODO: get the frames of the first three cells here so I can create a fancy transition
self.navigationController.pushViewController(collectionViewController, animated: true)
這是我已經嘗試:
let collectionViewController = SomeCollectionViewControllerSubclass(data: someData)
// force load the view
let view = collectionViewController.view
// try to get a cell directly (result: nil)
println(collectionViewController.collectionView.cellForRowAtIndexPath(NSIndexPath(forRow: 0, inSection: 0)
// try to ask the layout for the cell attributes (result: CGRectZero)
println(collectionViewController.collectionView.collectionViewLayout.initialLayoutAttributesForAppearingItemAtIndexPath(NSIndexPath(forRow: 0, inSection: 0)))
self.navigationController.pushViewController(collectionViewController, animated: true)
是的,這是我在過渡期間一直在做的事情。我希望有一個更靈活的解決方案,但這可能要做。謝謝! – user2393462435