自定义UICollectionViewCell上的标签插座在Swift中导致Optional.None崩溃 [英] Label Outlet On Custom UICollectionViewCell In Swift Causing Optional.None Crash

问题描述

我有一个collectionViewController，我想显示一堆自定义的UICollectionViewCells，上面有一些标签。不幸的是，每当我尝试访问自定义UICollectionViewCell的标签时，都会导致崩溃：

I have a collectionViewController that I want to display a bunch of custom UICollectionViewCells with some labels on them. Unfortunately whenever I try and access the custom UICollectionViewCell's label it causes a crash with:

控制台

致命错误：无法打开Optional.None

fatal error: Can't unwrap Optional.None

窗口

Thread1：EXC_BAD_INSTRUCTION（代码= EXC_1386_INVOP，子代码= 0x0）

Thread1: EXC_BAD_INSTRUCTION(code=EXC_1386_INVOP, subcode=0x0)

我正试图像这样访问标签：

I'm trying to access the label like so:

cell.name.text = names[indexPath!.item]

也许这来自我的商店标签为零？但是，寻找答案没有任何效果，因为我不确定添加的问题是什么？/！在我的代码中并没有真正帮助。

Perhaps this comes from my outlet label being nil? But looking around for answers nothing has worked, and because I'm not really sure what the issue is adding ?/! in my code isn't really helping.

MyCustomUICollectionViewController

class ScrambledTextCollectionViewController: UICollectionViewController {

    var names: String[] = ["Anna", "Alex", "Brian", "Jack"]

    override func viewDidLoad() {
        super.viewDidLoad()

        // Register cell classes
        self.collectionView.registerClass(MyCustomCollectionViewCell.self, forCellWithReuseIdentifier: reuseIdentifier)

    }

    override func numberOfSectionsInCollectionView(collectionView: UICollectionView?) -> Int {
        return 1
    }

    override func collectionView(collectionView: UICollectionView?, numberOfItemsInSection section: Int) -> Int {
        return names.count
    }

    override func collectionView(collectionView: UICollectionView?, cellForItemAtIndexPath indexPath: NSIndexPath?) -> UICollectionViewCell? {
        var cell = collectionView?.dequeueReusableCellWithReuseIdentifier("Cell", forIndexPath: indexPath) as MyCustomCollectionViewCell

        cell.name.text = names[indexPath!.item]

        return cell
    }
}

MyCustomCollectionViewCell

class MyCustomCollectionViewCell: UICollectionViewCell {

    @IBOutlet var name: UILabel
    init(frame: CGRect) {
        super.init(frame: frame)                
    }
}

推荐答案

找到答案这里

删除， self.collectionView.registerClass（MyCustomCollectionViewCell.self，forCellWithReuseIdentifier：reuseIdentifier）

阅读链接了解

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