滚动时水平集合视图冻结

Question

我在一个具有单独视图的同一个viewcontroller中有一个collectionView和tableview。我正在使用Kingfisher下载图像。我可以毫无问题地滚动tableview。但是当我滚动collectionview时，应用程序会冻结，并且在一段时间之后应用程序崩溃并获得调试消息为＆＃34;来自调试器的消息：由于内存问题而终止＆＃34;。

func setupCollectionView(){
    let cell = UINib(nibName: "FilterCollectionCell", bundle: Bundle(for: FilterCollectionCell.self))
    self.collectionView.register(cell, forCellWithReuseIdentifier: "FilterCollectionCell")
    self.collectionFlowOut.estimatedItemSize = CGSize(width: 1, height: 1)
}

func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return self.sharedData.offerDetails.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "FilterCollectionCell", for: indexPath) as! FilterCollectionCell

    if self.sharedData.offerDetails.count > indexPath.row{
        let offerDetail = self.sharedData.offerDetails[indexPath.row]
        cell.price.text = offerDetail.currency + " " + offerDetail.lowestFare.withCommas()

        if let firstSector = offerDetail.flightDetails.first,
            let firstOption = firstSector.options.first,
            let firstSegment = firstOption.flightSegments.first{
            cell.flightName.text = firstSegment.airlineName
            let imgURL = self.sharedData.imageURL.replacingOccurrences(of: "{airlineID}", with: firstSegment.airlineCode)
            let placeholderImage = UIImage(named: "AirlineIcon")
            let url = URL(string: imgURL)
            cell.logoImage.kf.indicatorType = .activity
            cell.logoImage.kf.setImage(with: url, placeholder: placeholderImage, options: [], progressBlock: nil, completionHandler: nil)
        }
    }
    cell.backgroundColor = UIColor.clear
    cell.layoutIfNeeded()
    cell.setNeedsLayout()
    return cell
}

这是我的collectionView方法

当我删除了estimatedItemSize时，滚动效果很好，但我不能根据标签内容调整单元格大小。

        self.collectionFlowOut.estimatedItemSize = CGSize(width: 1, height: 1)

Answer 1

只需删除

cell.layoutIfNeeded()
cell.setNeedsLayout()

为什么以这种方式打电话给他们