集合视图作为自定义键盘不起作用

问题描述 投票:1回答:1

我正在构建具有自定义键盘的应用程序。

在它的类中我创建了集合视图,这里是代码:

class KeyboardViewController: UIInputViewController, UICollectionViewDelegateFlowLayout, UICollectionViewDataSource, UICollectionViewDelegate {

let stickerImages = [
    UIImage(named: "Image-1"),
    UIImage(named: "Image-2"),
    UIImage(named: "Image-3"),
    UIImage(named: "Image-4"),
    UIImage(named: "Image-5")
]

@IBOutlet var nextKeyboardButton: UIButton!
@IBOutlet var collectionView: UICollectionView!

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

override func viewDidLoad() {
    super.viewDidLoad()

    let layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout()
    layout.scrollDirection = UICollectionView.ScrollDirection.vertical
    layout.sectionInset = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
    layout.itemSize = CGSize(width: 50, height: 50)

    collectionView = UICollectionView(frame: self.view.frame, collectionViewLayout: layout)
    collectionView.dataSource = self
    collectionView.delegate = self
    collectionView.register(StickersCell.self, forCellWithReuseIdentifier: StickersCell.reuseIdentifier)
    collectionView.backgroundColor = UIColor.white
    collectionView.showsHorizontalScrollIndicator = false
    collectionView.backgroundColor = UIColor.red

    collectionView.translatesAutoresizingMaskIntoConstraints = false

    self.view.addSubview(collectionView)

    self.nextKeyboardButton = UIButton(type: .system)

    self.nextKeyboardButton.setTitle(NSLocalizedString("Next Keyboard", comment: "Title for 'Next Keyboard' button"), for: [])
    self.nextKeyboardButton.sizeToFit()
    self.nextKeyboardButton.translatesAutoresizingMaskIntoConstraints = false
    self.nextKeyboardButton.backgroundColor = UIColor.white

    self.nextKeyboardButton.addTarget(self, action: #selector(handleInputModeList(from:with:)), for: .allTouchEvents)

    self.view.addSubview(self.nextKeyboardButton)

    self.nextKeyboardButton.leftAnchor.constraint(equalTo: self.view.leftAnchor).isActive = true
    self.nextKeyboardButton.bottomAnchor.constraint(equalTo: self.view.bottomAnchor).isActive = true

    self.collectionView.leftAnchor.constraint(equalTo: self.view.leftAnchor).isActive = true
    self.collectionView.rightAnchor.constraint(equalTo: self.view.rightAnchor).isActive = true
    self.collectionView.topAnchor.constraint(equalTo: self.view.topAnchor).isActive = true
    self.collectionView.bottomAnchor.constraint(equalTo: self.view.bottomAnchor).isActive = true
}

override func textWillChange(_ textInput: UITextInput?) {
    // The app is about to change the document's contents. Perform any preparation here.
}

override func textDidChange(_ textInput: UITextInput?) {
    // The app has just changed the document's contents, the document context has been updated.

    var textColor: UIColor
    let proxy = self.textDocumentProxy
    if proxy.keyboardAppearance == UIKeyboardAppearance.dark {
        textColor = UIColor.white
    } else {
        textColor = UIColor.black
    }
    self.nextKeyboardButton.setTitleColor(textColor, for: [])
}

func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {

    return stickerImages.count
}

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

    cell.setImage(stickerImages[indexPath.item]!)

    return cell
}}

这是我的Collection View单元类:

class StickersCell: UICollectionViewCell {

static let reuseIdentifier: String = "StickersCell"

lazy var imageView: UIImageView = {
    let imageView = UIImageView(frame: .zero)
    imageView.contentMode = .scaleAspectFit
    imageView.translatesAutoresizingMaskIntoConstraints = false
    return imageView
}()

override init(frame: CGRect) {
    super.init(frame: frame)
    contentView.clipsToBounds = true
    contentView.addSubview(imageView)

    imageView.leftAnchor.constraint(equalTo: contentView.leftAnchor).isActive = true
    imageView.rightAnchor.constraint(equalTo: contentView.rightAnchor).isActive = true
    imageView.topAnchor.constraint(equalTo: contentView.topAnchor).isActive = true
    imageView.bottomAnchor.constraint(equalTo: contentView.bottomAnchor).isActive = true
}

required init?(coder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
}

func setImage(_ image: UIImage) {
    imageView.image = image
}}

在将集合视图添加到任何UIViewUIViewController时,此代码工作正常,但是当尝试将其添加到键盘时,它会抛出此类错误:

Errors

据我所知,我已经将约束放错了,但我不明白究竟是什么问题,特别是当它在简单视图或视图控制器中正常工作时。

我用googled分配了,找不到任何解决方案......这个SO问题也没有帮助:

  1. First question
  2. Second question
  3. Third question

我也尝试将创建集合视图的代码移动到viewDidAppearviewWillAppear方法,但同样没有运气。

另一个奇怪的事情:如果我添加简单的UIView与键盘相同的约束 - 一切正常。问题似乎特别与集合视图有关。

那么,我错过了什么?如果有任何帮助,我将感激不尽,因为我已经与这个问题进行了一个多星期的斗争......

更新:

在阅读了Apple dev论坛之后,想到了我的想法:我之前和UITableView一样创建了UICollectionView,奇怪的是它有效。所以接下来的问题是:你能否使用UICollectionView作为自定义键盘?

ios swift uicollectionview keyboard custom-keyboard
1个回答
0
投票

在与这个问题作斗争2周后,终于找到了解决方法:

出于某种原因,你不能在UIImageView中使用MSStickerViewUICollectionViewCell,就像在iMessage扩展中一样,所以我只是在这个按钮里面加了透明的UIButtonUIImage而且它有效!

仍然不知道为什么你不能使用图像或视图,但找不到任何具体的信息,但我的解决方案有效,我希望这将有助于将来的人。

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