EXC_BAD_ACCESS tapping uisearchbar three times

I am trying to implement a search bar in a UICollectionView as a UICollectionViewReusableView

This way I am not using a UISearchController but I am changing the datasource of the collectionview

In my custom layout I am adding the searchbar this way:

override func prepareLayout() {
    super.prepareLayout()
    var searchBarAttributes = UICollectionViewLayoutAttributes(forSupplementaryViewOfKind: TeacherSearchbarIdentifier, withIndexPath: NSIndexPath(forItem: 0, inSection: 0))
    searchBarAttributes.frame = CGRectMake(0, 0, collectionViewContentSize().width, 44)
    searchBarAttributes.zIndex = 100
    miscAttributes.append(searchBarAttributes)
}

override func layoutAttributesForElementsInRect(rect: CGRect) -> [AnyObject]? {
    var attributes = [UICollectionViewLayoutAttributes]()
    for (idx, attr) in enumerate(miscAttributes) {
        if CGRectIntersection(rect, attr.frame) != CGRectNull {
            attributes.append(attr)
        }
    }

    return attributes
}

I am setting the delegate like this:

func collectionView(collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, atIndexPath indexPath: NSIndexPath) -> UICollectionReusableView {
    var view = collectionView.dequeueReusableSupplementaryViewOfKind(kind, withReuseIdentifier: kind, forIndexPath: indexPath) as! UICollectionReusableView
    if kind == TeacherSearchbarIdentifier {
        controller.searchBar = (view as! TeacherSearchView).searchBar
        return view
    }
}

The variable controller is the UICollectionViewController which implements the UISearchBarDelegate Protocol

The delegate is set in didSet of the searchBar variable. These are my delegates:

override func scrollViewDidScroll(scrollView: UIScrollView) {
    self.view.endEditing(true)
}

func searchBarShouldBeginEditing(searchBar: UISearchBar) -> Bool {
    searchBar.setShowsCancelButton(true, animated: true)
    return true
}

func searchBarShouldEndEditing(searchBar: UISearchBar) -> Bool {
    searchBar.setShowsCancelButton(false, animated: true)
    searchBar.resignFirstResponder()
    return true
}

func searchBarCancelButtonClicked(searchBar: UISearchBar) {
    searchBar.setShowsCancelButton(false, animated: true)
    searchBar.resignFirstResponder()
}

Now my problem!

When I am tapping on the search bar, the keyboard appears. If I press the cancel button or scroll, it dissappears. Just as I want it to. This also works a second time.

BUT!

If I do this a third time, I get a EXC_BAD_ACCESS:

I tried turning on Enabling Zombie Objects, but no information was provided. I also tried profiling for Zombie Objects, it just crashes without any noticeable information.

Please help me on how I can resolve this error, or give me further debugging instructions.