在 swift 中收集視圖單元格滾動到中心時出現問題

Question

我在我的 VC 中有一個集合視圖，我水平滾動集合視圖，我想將每個單元格水平滾動居中，我嘗試了一個代碼，但是當它滾動時它顯示下一個單元格比第二個更左。這是我的代碼，

fileprivate let sectionInsets = UIEdgeInsets(top: 0, left: 15, bottom: 0, right: 15)

gridView.delegate = self
    gridView.dataSource = self
    gridView.register(ItemCollectionViewCell.self, forCellWithReuseIdentifier: "ItemCollectionViewCell")
    gridView.register(UINib(nibName: "ItemCollectionViewCell", bundle: nil), forCellWithReuseIdentifier: "ItemCollectionViewCell")
    gridView.showsHorizontalScrollIndicator = true
    gridView.bounces = true
    gridView.showsHorizontalScrollIndicator = false
    gridView.showsVerticalScrollIndicator = false

func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int
{
    return auctions?.properties?.count ?? 0
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell
{
    let cell:ItemCollectionViewCell = collectionView.dequeueReusableCell(withReuseIdentifier: "ItemCollectionViewCell", for: indexPath) as! ItemCollectionViewCell;
    cell.propertyData = (auctions?.properties![indexPath.row])!
    if auctions?.status == AuctionStatus.Live.rawValue {
        cell.noOfBidsPlaced.isHidden = false
    }
    else {
        cell.noOfBidsPlaced.isHidden = true
    }
    cell.populateCell()

    return cell
}


func collectionView(_ collectionView: UICollectionView,
                    layout collectionViewLayout: UICollectionViewLayout,
                    sizeForItemAt indexPath: IndexPath) -> CGSize {
    let size = CGSize(width: 335 , height: 337)
    return size
}

//3
func collectionView(_ collectionView: UICollectionView,
                    layout collectionViewLayout: UICollectionViewLayout,
                    insetForSectionAt section: Int) -> UIEdgeInsets {
    return sectionInsets
}

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat
{
    return sectionInsets.left
}

func collectionView(_ collectionView: UICollectionView,
                    layout collectionViewLayout: UICollectionViewLayout,
                    minimumLineSpacingForSectionAt section: Int) -> CGFloat {
    return sectionInsets.left

}

如何滾動每個單元格以完美居中？ 這是它在開始時顯示我的收藏的方式，

這就是它在滾動上顯示的內容，它是從左側剪切的

Answer 1

不要使用 static 高度和寬度。 稱之為 function。也許它對你有幫助：-

// func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize { // return CGSize(width: yourCollectionView.frame.size.width, height: yourCollectionView.frame.size.height ) / / }