Crash when loading UICollectionView in, why?

Question

There is no error log just this what I see.

I have a dynamic prototype UICollectionViewCell, and loading in here:

override func collectionView(collectionView: UICollectionView!, cellForItemAtIndexPath indexPath: NSIndexPath!) -> UICollectionViewCell! {

    var cell: LeftMenuCollectionViewCell

cell = collectionView.dequeueReusableCellWithReuseIdentifier("xxx", forIndexPath: indexPath) as LeftMenuCollectionViewCell // <- at this line something goes wrong

    return cell
}

I am registering class before:

self.collectionView.registerClass(UICollectionViewCell.self, forCellWithReuseIdentifier: "xxx")

Using iOS 8 beta 5 now

enter image description here

score 2 · Answer 1 · answered Aug 06 '14 at 12:40

You have registered UICollectionViewCell instead of your own cell class LeftMenuCollectionViewCell. So that the casting of

UICollectionviewCell as LeftMenuCollectionViewCell

is breaking and causing the crash. To fix this register the proper class

self.collectionView.registerClass(LeftMenuCollectionViewCell.self, forCellWithReuseIdentifier: "xxx")

score 2 · Accepted Answer · edited May 23 '17 at 12:15

2

Agree with the two solution below, I registered cell incorrectly, but afterward I found an other issue, cell's outlets become nil. And the solution for that was to remove whole registration, if UICollectionViewController was created via Interface Builder.

edited May 23 '17 at 12:15

Community

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1

answered Aug 06 '14 at 17:49

János

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score 1 · Answer 3 · answered Aug 06 '14 at 12:26

1

You have registered the cell incorrectly. Try this:

self.collectionView.registerClass(LeftMenuCollectionViewCell.self, forCellWithReuseIdentifier: "xxx")

answered Aug 06 '14 at 12:26

wottle

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Crash when loading UICollectionView in, why?

3 Answers3