具有多行的UICollectionView

Question

我使用UICollectionView（使用UIButtons的视图）预订时间：

    override func viewDidLoad() {
        super.viewDidLoad()        
        collectionViewTime.register(UINib(nibName: "TimeCollectionViewCell", bundle: nil), forCellWithReuseIdentifier: "timecell")
        collectionViewTime.dataSource = self
        collectionViewTime.delegate = self        
        if let layout = collectionViewTime.collectionViewLayout as? UICollectionViewFlowLayout {
            layout.scrollDirection = .vertical
        }

    }

    func numberOfSections(in collectionView: UICollectionView) -> Int {
        return 1
    }

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return Timeline.count
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {            
        let flowLayout = collectionViewLayout as! UICollectionViewFlowLayout
        let numberOfItems = CGFloat(collectionView.numberOfItems(inSection: 0))
        let combinedItemWidth = (numberOfItems * flowLayout.itemSize.width) + ((numberOfItems - 1)  * flowLayout.minimumInteritemSpacing)
        let padding = (collectionView.frame.width - combinedItemWidth) / 2
        return UIEdgeInsets(top: 0, left: padding, bottom: 0, right: padding)
    }

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {            
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "timecell", for: indexPath) as! TimeCollectionViewCell            
        let time = Timeline[indexPath.row][0]
        cell.btnTime.setTitle(DateManager.dateToTime(date: time.0), for: .normal)            
        return cell
    }

我在一行中得到了所有观点（UIButtons）： 如何在新行中设置自动移动的UIView？ 因此，在我的情况下（iPad），一行将包含7个UIViews，iPhone将在一行中包含4-5个UIViews。

Answer 1

为此，您需要实施UICollectionViewDelegateFlowLayout方法collectionView(_:layout:sizeForItemAt:)并将collectionView的{​​{1}}更改为Scroll direction

Vertical

Answer 2

请再使用一个流代理方法，如下所示

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize;
------
 func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        return CGSize(width:(button width), height:button hieght);
    }