如何在iOS上插入键盘类型的电子邮件按钮".com“？

yourTextField.keyboardType = .emailAddress

// 创建工具栏
let toolbar = UIToolbar()
toolbar.sizeToFit()

// 创建".com"按钮
let comButton = UIBarButtonItem(title: ".com", style: .plain, target: self, action: #selector(insertCom))

// 将按钮添加到工具栏
toolbar.items = [comButton]

// 将工具栏设置为文本输入框的inputAccessoryView
yourTextField.inputAccessoryView = toolbar

@objc func insertCom() {
    yourTextField.text?.append(".com")
}