Arrays 如何将这些单独的标签压缩到自定义UICollectionView单元格中的标签数组？

这段代码工作得非常好，但我假设有一种更有效的方法来做这样的事情。我将字符串数组的前四项（此列表可以包含无限量的变量）作为“快照”视图提供给用户。下面的代码位于自定义单元格类的内部

var tray: Tray? {

    didSet {
        guard let trayTitle = tray?.title else { return }
        guard let trayItems = tray?.items else { return }
        // tray.items will give an array of strings
        trayTitleLabel.text = trayTitle

        if trayItems.count == 1 {
            firstSnapshotLabel.text = trayItems[0]
            secondSnapshotLabel.text = ""
            thirdSnapshotLabel.text = ""
            fourthSnapshotLabel.text = ""
        } else if trayItems.count == 2 {
            firstSnapshotLabel.text = trayItems[0]
            secondSnapshotLabel.text = trayItems[1]
            thirdSnapshotLabel.text = ""
            fourthSnapshotLabel.text = ""
        } else if trayItems.count == 3 {
            firstSnapshotLabel.text = trayItems[0]
            secondSnapshotLabel.text = trayItems[1]
            thirdSnapshotLabel.text = trayItems[2]
            fourthSnapshotLabel.text = ""
        } else if trayItems.count >= 4 {
            firstSnapshotLabel.text = trayItems[0]
            secondSnapshotLabel.text = trayItems[1]
            thirdSnapshotLabel.text = trayItems[2]
            fourthSnapshotLabel.text = trayItems[3]
        } else {
            firstSnapshotLabel.text = ""
            secondSnapshotLabel.text = ""
            thirdSnapshotLabel.text = ""
            fourthSnapshotLabel.text = ""
        }

然后，我手动设置每个标签：

let firstSnapshotLabel: UILabel = {
    let label = UILabel()
    label.attributes(text:"Item 1", textColor: Colors.appDarkGrey, alignment: .left, font: Fonts.rubikRegular, size: 12, characterSpacing: 0.5, backgroundColor: nil)
    return label
}()

let secondSnapshotLabel: UILabel = {
    let label = UILabel()
    label.attributes(text:"Item 2", textColor: Colors.appDarkGrey, alignment: .left, font: Fonts.rubikRegular, size: 12, characterSpacing: 0.5, backgroundColor: nil)
    return label
}()

let thirdSnapshotLabel: UILabel = {
    let label = UILabel()
    label.attributes(text:"Item 3", textColor: Colors.appDarkGrey, alignment: .left, font: Fonts.rubikRegular, size: 12, characterSpacing: 0.5, backgroundColor: nil)
    return label
}()

let fourthSnapshotLabel: UILabel = {
    let label = UILabel()
    label.attributes(text:"Item 4", textColor: Colors.appDarkGrey, alignment: .left, font: Fonts.rubikRegular, size: 12, characterSpacing: 0.5, backgroundColor: nil)
    return label
}()

正如我所说，上面的代码提供了我想要的，但是它非常混乱和低效。 我还尝试了一些不太管用的东西。我假设“快照标签”是在填充“快照”数组之前加载到视图中的。我假设这是因为当我打印“快照”时，我得到了填充的数组，但当我打印“快照标签”时，我得到了一个空数组

var tray: Tray? {

    didSet {
        guard let trayTitle = tray?.title else { return }
        guard let trayItems = tray?.items else { return }
        // tray.items will give an array of strings
        trayTitleLabel.text = trayTitle

        for item in trayItems {
            snapshots.append(item) 
        }
    }
}

var snapshots = [] as [String]

    lazy var snapshotLabels = snapshots.prefix(4).map { item -> UILabel in
        let label = UILabel()
        label.attributes(text:"\(item)", textColor: Colors.appDarkGrey, alignment: .left, font: Fonts.rubikRegular, size: 12, characterSpacing: 0.5, backgroundColor: nil)
        return label
    }

托盘结构和实例数组：

struct Tray {
let title: String
let items: [String]
}

let trays = [Tray(title: "Groceries", items: ["Apples","Water","Milk","Eggs","Fruity Pebbles","Bread","Butter","Flour","Yogurt","Pop-Tarts"]),
             Tray(title: "Home", items: ["Laundry","Trash","Clean desk"]),
             Tray(title: "Miscellaneous", items: ["Call mom","Feed dogs"]),
             Tray(title: "Bucket List", items: ["Skydiving","England","Pilot's license","Learn spanish","Barcelona","Italy"]),
             Tray(title: "Dinner", items: ["Pasta","Crabs","Tacos","Pizza","Steak","Cheesesteaks","Chicken and Rice"])
]

有人知道为什么会这样吗？

---

谢谢D

将标签做成一个数组

  let labels = (0..<4).map {
    let label = UILabel()
    label.attributes(text:"Item \($0)", textColor: Colors.appDarkGrey, alignment: .left, font: Fonts.rubikRegular, size: 12, characterSpacing: 0.5, backgroundColor: nil)
    return label
  }

let labels=（0。。
  (0..<trayItems.count).forEach { labels[$0].text = trayItems[$0] }
  (trayItems.count..<labels.count).forEach { $0.text = "" }