Swift 3 中的 CSStickyHeaderFlowLayout

Question

在我的UICollectionView 中使用了CSStickyHeaderFlowLayout 类（https://github.com/CSStickyHeaderFlowLayout/CSStickyHeaderFlowLayout）。它通过使用 Swift2.3 在 iOS7 中工作。更新到Swift3后，失败了。 错误消息如下。

未捕获的异常：索引路径 ( {length = 2, path = 0 - 0}) 处的补充项目的布局属性从 indexPath: {0, 0} zIndex: 1024 有效: YES kind: UICollectionElementKindSectionHeader to indexPath: {0, 0}

我的代码如下。

let flowLayout = CSStickyHeaderFlowLayout()
    collectionView = UICollectionView(frame: CGRect(x: 0, y: self.navigationController!.navigationBar.frame.size.height+statusBarHeight() ,width: screenWidth,  height: screenHeight-(self.navigationController!.navigationBar.frame.size.height+statusBarHeight())), collectionViewLayout: flowLayout)    

self.collectionView?.register(CollectionParallaxHeader.self, forSupplementaryViewOfKind: CSStickyHeaderParallaxHeader, withReuseIdentifier: "parallaxHeader")

self.headerNib = UINib(nibName: "CSParallaxHeader", bundle: nil)
self.collectionView.register(self.headerNib, forSupplementaryViewOfKind: CSStickyHeaderParallaxHeader, withReuseIdentifier: "header")

fileprivate var layout : CSStickyHeaderFlowLayout? {
    return self.collectionView?.collectionViewLayout as? CSStickyHeaderFlowLayout
}

func onParallaxHeadered(_ count:Int)
{
    if count == 0
    {
        self.layout?.parallaxHeaderReferenceSize = CGSize(width: getScreenWidth(), height: 0)
    }
}

func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {
    let view = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: "parallaxHeader", for: indexPath) as! CollectionParallaxHeader

    return view
}

我不知道如何解决这个问题。有没有人提出一些建议？ 谢谢。

Answer 1

我找到了答案here。

代码是

override func viewDidLoad() {
    super.viewDidLoad()
    if #available(iOS 10.0, *) {
        self.collectionView?.isPrefetchingEnabled = false
    } else {
        //Fallback on earlier versions
    }
}