了解如何在iOS Swift中创建具有多个列的表

Question

到目前为止,我花了一半时间研究并试图了解如何制作一个包含多列的表格.令人尴尬的是,我对Swift和编程一般都很陌生,所以我读过很多东西并没有给我太多帮助.

我基本上找到了我想要用这位绅士的血腥创造的东西:http://www.brightec.co.uk/blog/uicollectionview-using-horizo​​ntal-and-vertical-scrolling-sticky-rows-and-columns

然而,即使和他的Github我仍然感到困惑.好像他根本没有使用Storyboard(对于我的项目,我一直在使用故事板).我假设这是正确的吗？

到目前为止我所拥有的是嵌入在导航控制器中的UICollectionView.从这里开始,我在CollectionView中创建了一个新的cocoa touch类文件.但是从这里开始我不知道该去哪里.

如果我可以有一些方向,从这里去哪里或如何正确设置,将非常感激.

非常感谢提前!

Answer 1

IOS 10,XCode 8,Swift 3.0

我发现了一个很棒的教程.感谢Kyle Andrews

我创建了一个垂直表,可以通过子类化UICollectionViewLayout在两个方向上滚动.下面是代码.

 class CustomLayout: UICollectionViewLayout {

    let CELL_HEIGHT: CGFloat = 50
    let CELL_WIDTH: CGFloat = 180


    var cellAttributesDictionary = Dictionary<IndexPath, UICollectionViewLayoutAttributes>()
    var contentSize = CGSize.zero

    override var collectionViewContentSize: CGSize {
        get {
            return contentSize
        }
    }

    var dataSourceDidUpdate = true

    override func prepare() {

        let STATUS_BAR_HEIGHT = UIApplication.shared.statusBarFrame.height
        let NAV_BAR_HEIGHT = UINavigationController().navigationBar.frame.size.height

        collectionView?.bounces = false

        if !dataSourceDidUpdate {

            let yOffSet = collectionView!.contentOffset.y

            for section in 0 ..< collectionView!.numberOfSections {
                if section == 0 {
                    for item in 0 ..< collectionView!.numberOfItems(inSection: section) {
                        let cellIndexPath = IndexPath(item: item, section: section)
                        if let attrs = cellAttributesDictionary[cellIndexPath] {
                            var frame = attrs.frame
                            frame.origin.y = yOffSet + STATUS_BAR_HEIGHT + NAV_BAR_HEIGHT
                            attrs.frame = frame
                        }
                    }
                }
            }
           return
        }

        dataSourceDidUpdate = false

        for section in 0 ..< collectionView!.numberOfSections {
            for item in 0 ..< collectionView!.numberOfItems(inSection: section) {
                let cellIndexPath = IndexPath(item: item, section: section)
                let xPos = CGFloat(item) * CELL_WIDTH
                let yPos = CGFloat(section) * CELL_HEIGHT

                let cellAttributes = UICollectionViewLayoutAttributes(forCellWith: cellIndexPath)
                cellAttributes.frame = CGRect(x: xPos, y: yPos, width: CELL_WIDTH, height: CELL_HEIGHT)

                // Determine zIndex based on cell type.
                if section == 0 && item == 0 {
                    cellAttributes.zIndex = 4
                } else if section == 0 {
                    cellAttributes.zIndex = 3
                } else if item == 0 {
                    cellAttributes.zIndex = 2
                } else {
                    cellAttributes.zIndex = 1
                }

                cellAttributesDictionary[cellIndexPath] = cellAttributes

            }
        }

        let contentWidth = CGFloat(collectionView!.numberOfItems(inSection: 0)) * CELL_WIDTH
        let contentHeight = CGFloat(collectionView!.numberOfSections) * CELL_HEIGHT
        contentSize = CGSize(width: contentWidth, height: contentHeight)
    }

    override func layoutAttributesForElements(in rect: CGRect) -> [UICollectionViewLayoutAttributes]? {
        var attributesInRect = [UICollectionViewLayoutAttributes]()

        for cellAttrs in cellAttributesDictionary.values {
            if rect.intersects(cellAttrs.frame) {
                attributesInRect.append(cellAttrs)
            }
        }

        return attributesInRect
    }

    override func layoutAttributesForItem(at indexPath: IndexPath) -> UICollectionViewLayoutAttributes? {
        return cellAttributesDictionary[indexPath]
    }

    override func shouldInvalidateLayout(forBoundsChange newBounds: CGRect) -> Bool {
        return true
    }
}

下面是我的CollectionViewController代码.

    import UIKit

private let reuseIdentifier = "Cell"

class VerticalCVC: UICollectionViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        collectionView?.isScrollEnabled = true
    }

    // MARK: UICollectionViewDataSource

    override func numberOfSections(in collectionView: UICollectionView) -> Int {

        return 20
    }


    override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 10
    }

    override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: reuseIdentifier, for: indexPath) as! CustomCell

        if indexPath.section == 0 {
            cell.backgroundColor = UIColor.darkGray
            cell.titleLabel.textColor = UIColor.white


        } else {
            cell.backgroundColor = UIColor.white
            cell.titleLabel.textColor = UIColor.black
        }

        cell.titleLabel.text = "section: \(indexPath.section) && row: \(indexPath.row)"

        return cell
    }
}

要强制CollectionView使用自定义布局而不是UICollectionViwFlowLayout,请检查下图.

结果:

人像模式

景观模式

Answer 2

一种方法是在tableviewcontroller中使用自定义单元格.您的故事板包含一个表格,其中单元格是一个自定义单元格,其中UILabel用于彼此相邻的列(具有正确定义的约束).

控制器的示例代码如下所示:

import UIKit

class TableViewController: UITableViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }

    // MARK: - Table view data source

    override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
        return 1
    }

    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

        return 3
    }


    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCellWithIdentifier("reuseIdentifier", forIndexPath: indexPath) as TableViewCell
        cell.column1.text = "1" // fill in your value for column 1 (e.g. from an array)
        cell.column2.text = "2" // fill in your value for column 2

        return cell
    }

}

和:

import UIKit

class TableViewCell: UITableViewCell {

    @IBOutlet weak var column1: UILabel!
    @IBOutlet weak var column2: UILabel!
    override func awakeFromNib() {
        super.awakeFromNib()
        // Initialization code
    }

    override func setSelected(selected: Bool, animated: Bool) {
        super.setSelected(selected, animated: animated)

        // Configure the view for the selected state
    }

}