使用InputAccessoryView swift在键盘顶部添加视图

Question

我试图将uiview添加到键盘顶部。 我首先使用KeyboardWillShow / Hide完成了它，但它并没有涵盖所有内容 我试图使用inputAccesoryView。 这就是我的尝试：

private var accessoryView = UIView(frame: CGRectZero)

class ViewController : UIViewController {

var myView: customUIView

override var inputAccessoryView: UIView {
    return accessoryView
}

override func canBecomeFirstResponder() -> Bool {
    return true
}

override func viewDidLoad() {
   super.viewDidLoad()
   accessoryView = myView
}
}

我收到以下错误： 由于未捕获的异常终止应用程序＆＃39; UIViewControllerHierarchyInconsistency＆＃39;，原因：＆＃39;子视图控制器：UICompatibilityInputViewController应该有父视图控制器：MyViewController但是请求的父级是：UIInputWindowController：＆＃39;

任何帮助将不胜感激！

Answer 1

为了让视图坚持键盘，代码本身非常简单。您发布的代码不正确，请尝试此操作（请注意，您必须将textField与故事板中的UITextField相关联：

@IBOutlet weak var textField: UITextField!

override func viewDidLoad() {
    super.viewDidLoad()

    let customView = UIView(frame: CGRect(x: 0, y: 0, width: 10, height: 44))
    customView.backgroundColor = UIColor.red
    textField.inputAccessoryView = customView
}

Answer 2

详细

• Xcode 9.2，swift 4
• Xcode 10.2.1（10E1001），Swift 5

解决方案

  

KeyboardToolbarButton

import UIKit

enum KeyboardToolbarButton: Int {

    case done = 0
    case cancel
    case back, backDisabled
    case forward, forwardDisabled

    func createButton(target: Any?, action: Selector?) -> UIBarButtonItem {
        var button: UIBarButtonItem!

        switch self {
        case .back:
            button = UIBarButtonItem(title: "back", style: .plain, target: target, action: action)
        case .backDisabled:
            button = UIBarButtonItem(title: "back", style: .plain, target: target, action: action)
            button.isEnabled = false
        case .forward:
            button = UIBarButtonItem(title: "forward", style: .plain, target: target, action: action)
        case .forwardDisabled:
            button = UIBarButtonItem(title: "forward", style: .plain, target: target, action: action)
            button.isEnabled = false
        case .done:
            button = UIBarButtonItem(title: "done", style: .plain, target: target, action: action)
        case .cancel:
            button = UIBarButtonItem(title: "cancel", style: .plain, target: target, action: action)
        }
        button.tag = rawValue
        return button
    }

    static func detectType(barButton: UIBarButtonItem) -> KeyboardToolbarButton? {
        return KeyboardToolbarButton(rawValue: barButton.tag)
    }
}

  

KeyboardToolbar

import UIKit

protocol KeyboardToolbarDelegate: class {
    func keyboardToolbar(button: UIBarButtonItem, type: KeyboardToolbarButton, tappedIn toolbar: KeyboardToolbar)
}

class KeyboardToolbar: UIToolbar {

    weak var toolBarDelegate: KeyboardToolbarDelegate?

    init() {
        super.init(frame: .zero)
        barStyle = UIBarStyle.default
        isTranslucent = true
        sizeToFit()
        isUserInteractionEnabled = true
    }

    func setup(leftButtons: [KeyboardToolbarButton], rightButtons: [KeyboardToolbarButton]) {

        let leftBarButtons = leftButtons.map { (item) -> UIBarButtonItem in
            return item.createButton(target: self, action: #selector(buttonTapped))
        }

        let rightBarButtons = rightButtons.map { (item) -> UIBarButtonItem in
            return item.createButton(target: self, action: #selector(buttonTapped(sender:)))
        }

        let spaceButton = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
        setItems(leftBarButtons + [spaceButton] + rightBarButtons, animated: false)
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }

    @objc func buttonTapped(sender: UIBarButtonItem) {
        if let type = KeyboardToolbarButton.detectType(barButton: sender) {
            toolBarDelegate?.keyboardToolbar(button: sender, type: type, tappedIn: self)
        }
    }

}

完整的使用示例

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        createTextField(frame: CGRect(x: 50, y: 50, width: 200, height: 40), leftButtons: [.backDisabled, .forward], rightButtons: [.cancel])
        createTextField(frame: CGRect(x: 50, y: 120, width: 200, height: 40), leftButtons: [.back, .forwardDisabled], rightButtons: [.done])
    }

    private func createTextField(frame: CGRect, leftButtons: [KeyboardToolbarButton] = [], rightButtons: [KeyboardToolbarButton] = []) {
        let textField = UITextField(frame: frame)
        textField.borderStyle = .roundedRect
        let toolbar = KeyboardToolbar()
        toolbar.toolBarDelegate = self
        toolbar.setup(leftButtons: leftButtons, rightButtons: rightButtons)
        textField.inputAccessoryView = toolbar
        view.addSubview(textField)
    }
}

extension ViewController: KeyboardToolbarDelegate {
   func keyboardToolbar(button: UIBarButtonItem, type: KeyboardToolbarButton, tappedIn toolbar: KeyboardToolbar) {
        print("Tapped button type: \(type)")
    }
}

结果

Answer 3

对代码进行的更改：

• 给accessoryView一个高度
• 删除var myView: customUIView＆amp;整个viewDidLoad()覆盖

Answer 4

尝试一下。

override var inputAccessoryView: UIView? {
    get {
       return containerView
    }
}
override var canBecomeFirstResponder: Bool {
   return true
}