如何将 UICollectionView 添加到 inputAccessoryView

Question

我想将UICollectionView 添加到inputAccessoryView 以便滚动列表。

override var inputAccessoryView: UIView? {
    let customView = UIView(frame: CGRect(x: 0, y: 0, width: 10, height: 80))
    customView.backgroundColor = UIColor.red
    return customView
}

Answer 1

要将UICollectionView 添加为inputAccessoryView，

1. 首先创建一个包含UICollectionView 的custom UIView，并向其中添加UICollectionViewDataSource 方法。

class CustomView: UIView, UICollectionViewDataSource {
    @IBOutlet weak var collectionView: UICollectionView!

    let words = ["abscind","downwind","headwind","lind","rescind","sind","skinned","tailwind","thin-skinned","tinned","twinned","upwind","whirlwind","wind"]

    override func awakeFromNib() {
        super.awakeFromNib()
        self.collectionView.register(UINib(nibName: "CustomCell", bundle: nil), forCellWithReuseIdentifier: "cell")
    }

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

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! CustomCell
        cell.label.text = self.words[indexPath.row]
        return cell
    }
}

class CustomCell: UICollectionViewCell {
    @IBOutlet weak var label: UILabel!
}

2. 根据您的要求将上面创建的CustomView 的实例添加为UITextField/UITextView 的inputAccessoryView。

class ViewController: UIViewController {
    @IBOutlet weak var textField: UITextField!

    override func viewDidLoad() {
        super.viewDidLoad()

        if let customView = Bundle.main.loadNibNamed("CustomView", owner: self, options: nil)?.first as? CustomView {
            self.textField.inputAccessoryView = customView
        }
    }
}

在上面的代码中，你可以根据需要给collectionView配置数据。