请告诉我这个 UI 名称是如何命名的

这是通过输入附件视图完成的 UIViewController

使用您的文本作为输入附件视图，UIViewController因此从故事板中删除该底部视图

在您的视图控制器中添加以下内容

var viewAcc: UIView?
var sendButton: UIButton!
var inputTextField: UITextField!

override var inputAccessoryView: UIView? {
    return viewAcc
}

override var canBecomeFirstResponder: Bool {
    return true
}

在视图中加载方法添加以下代码
注意：请根据您的要求更改约束

    viewAcc = UIView(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 44))
    viewAcc?.backgroundColor = UIColor.white
    inputTextField = UITextField (frame: CGRect(x:8, y:0, width:UIScreen.main.bounds.width, height: 44 ))
    inputTextField.inputAccessoryView = nil
    inputTextField.delegate = self as? UITextFieldDelegate
    inputTextField.placeholder = "Enter message..."
    viewAcc?.backgroundColor = .white
    viewAcc?.addSubview(inputTextField);

    let topBorderView = UIView()
    topBorderView.backgroundColor = UIColor(white: 0.5, alpha: 0.5)
    viewAcc?.addSubview(topBorderView)
    viewAcc?.addConstraintsWithFormat(format: "H:|[v0]|", views: topBorderView)
    viewAcc?.addConstraintsWithFormat(format: "V:|[v0(0.5)]", views: topBorderView)

    sendButton = UIButton(type: .system)
    sendButton.isEnabled = true
    sendButton.titleLabel?.font = UIFont.systemFont(ofSize: 16)
    sendButton.setTitle("Send", for: .normal)
    sendButton.contentEdgeInsets = UIEdgeInsets(top: 8, left: 8, bottom: 8, right: 8)
    sendButton.addTarget(self, action: #selector(handleSend), for: .touchUpInside)
    viewAcc?.addSubview(sendButton)

    inputTextField.translatesAutoresizingMaskIntoConstraints = false
    sendButton.translatesAutoresizingMaskIntoConstraints = false
    viewAcc?.addConstraint(NSLayoutConstraint(item: inputTextField, attribute: .left, relatedBy: .equal, toItem: viewAcc, attribute: .left, multiplier: 1, constant: 8))
    viewAcc?.addConstraint(NSLayoutConstraint(item: inputTextField, attribute: .top, relatedBy: .equal, toItem: viewAcc, attribute: .top, multiplier: 1, constant: 7.5))
    viewAcc?.addConstraint(NSLayoutConstraint(item: inputTextField, attribute: .right, relatedBy: .equal, toItem: sendButton, attribute: .left, multiplier: 1, constant: -2))
    viewAcc?.addConstraint(NSLayoutConstraint(item: inputTextField, attribute: .bottom, relatedBy: .equal, toItem: viewAcc, attribute: .bottom, multiplier: 1, constant: -8))
    viewAcc?.addConstraint(NSLayoutConstraint(item: sendButton, attribute: .right, relatedBy: .equal, toItem: viewAcc, attribute: .right, multiplier: 1, constant: 0))
    viewAcc?.addConstraint(NSLayoutConstraint(item: sendButton, attribute: .bottom, relatedBy: .equal, toItem: viewAcc, attribute: .bottom, multiplier: 1, constant: -4.5))

转到 Storyboard 选择您的 tableview 并将键盘关闭模式设置为交互式就是这样

现在您可以用手指拖动以关闭键盘和文本字段

编辑 IPHONE X 支持

lazy var viewAcc: SafeAreaInputAccessoryViewWrapperView = {
    return SafeAreaInputAccessoryViewWrapperView(for: button)
}()

这是完整的演示https://github.com/29satnam/InputAccessoryView

希望它有帮助