将 UIToolBar 添加到所有键盘（swift）

Question

我正在尝试将自定义 UIToolBar 添加到我的所有键盘中，并尽可能少地重复。我目前这样做的方式需要我将代码添加到我的所有 viewDidLoads 并将每个文本字段的委托分配给我正在使用的 viewController。我曾尝试创建自己的 UIToolBar 子类，但我发现当我的“完成”和“取消”按钮的目标是自身视图时，我真的无法做到这一点。有人对创建易于重用的工具栏有任何建议吗？提前致谢。

override func viewDidLoad() {
    super.viewDidLoad()

    var toolBar = UIToolbar()
    toolBar.barStyle = UIBarStyle.Default
    toolBar.translucent = true
    toolBar.tintColor = UIColor(red: 76/255, green: 217/255, blue: 100/255, alpha: 1)
    var doneButton = UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.Done, target: self, action: "donePressed")
    var cancelButton = UIBarButtonItem(title: "Cancel", style: UIBarButtonItemStyle.Plain, target: self, action: "cancelPressed")
    var spaceButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target: nil, action: nil)
    toolBar.setItems([cancelButton, spaceButton, doneButton], animated: false)
    toolBar.userInteractionEnabled = true
    toolBar.sizeToFit()

    stateField.inputAccessoryView = toolBar
    stateField.delegate = self

Answer 1

我有一个实用程序，我已经使用了一段时间（从 Objective-C 移植到 Swift），它可以做到这一点，你可能会发现它很有用：

https://github.com/ncerezo/SwiftKeyboardAccessory

它创建一个工具栏，其中至少有一个“完成”按钮来关闭键盘，以及可选的下一个和上一个按钮。它还负责在您在文本字段外点击时关闭键盘，以及在键盘出现或消失时调整视图大小和滚动视图。 它旨在与 UITableVIew 以及 UIScrollView 一起使用。

Answer 2

感谢 Glorfindel 的建议和 ncerezo 的示例代码，我使用扩展解决了我的问题。

extension UIViewController: UITextFieldDelegate{
    func addToolBar(textField: UITextField){
        var toolBar = UIToolbar()
        toolBar.barStyle = UIBarStyle.Default
        toolBar.translucent = true
        toolBar.tintColor = UIColor(red: 76/255, green: 217/255, blue: 100/255, alpha: 1)
        var doneButton = UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.Done, target: self, action: "donePressed")
        var cancelButton = UIBarButtonItem(title: "Cancel", style: UIBarButtonItemStyle.Plain, target: self, action: "cancelPressed")
        var spaceButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target: nil, action: nil)
        toolBar.setItems([cancelButton, spaceButton, doneButton], animated: false)
        toolBar.userInteractionEnabled = true
        toolBar.sizeToFit()

        textField.delegate = self
        textField.inputAccessoryView = toolBar
    }
    func donePressed(){
        view.endEditing(true)
    }
    func cancelPressed(){
        view.endEditing(true) // or do something
    }
}

虽然我仍然需要在我的所有文本字段上调用下面的代码。我觉得可能有更好的方法，而不必在每个 textField 上调用函数，但现在这绝对是更可重用的。

override func viewDidLoad() {
    super.viewDidLoad()
    addToolBar(addressField)
}

Answer 3

相当于 swift 3 中的 vivian 版本：

extension UIViewController: UITextFieldDelegate {
    func addToolBar(textField: UITextField) {
        let toolBar = UIToolbar()
        toolBar.barStyle = .default
        toolBar.isTranslucent = true
        toolBar.tintColor = UIColor(red: 76 / 255, green: 217 / 255, blue: 100 / 255, alpha: 1)
        let doneButton = UIBarButtonItem(title: "Done", style: .done, target: self, action: #selector(donePressed))
        let cancelButton = UIBarButtonItem(title: "Cancel", style: .plain, target: self, action: #selector(cancelPressed))
        let spaceButton = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
        toolBar.setItems([cancelButton, spaceButton, doneButton], animated: false)


        toolBar.isUserInteractionEnabled = true
        toolBar.sizeToFit()

        textField.delegate = self
        textField.inputAccessoryView = toolBar
    }

    func donePressed() {
        view.endEditing(true)
    }

    func cancelPressed() {
        view.endEditing(true) // or do something
    }
}

Answer 4

您可以利用响应者链使 UIToolbar 子类工作。无需更改您的视图控制器。在 Swift 3 中：

class KeyboardAccessoryToolbar: UIToolbar {
    convenience init() {
        self.init(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 50))
        self.barStyle = .default
        self.isTranslucent = true
        self.tintColor = UIColor(red: 76 / 255, green: 217 / 255, blue: 100 / 255, alpha: 1)

        let doneButton = UIBarButtonItem(barButtonSystemItem: .done, target: self, action: #selector(self.done))
        let cancelButton = UIBarButtonItem(barButtonSystemItem: .cancel, target: self, action: #selector(self.cancel))
        let spaceButton = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
        self.items = [cancelButton, spaceButton, doneButton]

        self.isUserInteractionEnabled = true
        self.sizeToFit()
    }

    func done() {
        // Tell the current first responder (the current text input) to resign.
        UIApplication.shared.sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: nil, for: nil)
    }

    func cancel() {
        // Call "cancel" method on first object in the responder chain that implements it.
        UIApplication.shared.sendAction(#selector(cancel), to: nil, from: nil, for: nil)
    }
}

然后将以下内容添加到您的 applicationDidFinishLaunching 以将其应用于您的所有键盘：

    let accessoryView = KeyboardAccessoryToolbar()
    UITextField.appearance().inputAccessoryView = accessoryView
    UITextView.appearance().inputAccessoryView = accessoryView

Answer 5

对于 swift 4，你可以使用这个：-

extension UIViewController : UITextFieldDelegate {
    func addToolBar(textField: UITextField){
        var toolBar = UIToolbar()
        toolBar.barStyle = UIBarStyle.default
        toolBar.isTranslucent = true
        toolBar.tintColor = UIColor(red: 76/255, green: 217/255, blue: 100/255, alpha: 1)
        var doneButton = UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.done, target: self, action: "donePressed")
        var cancelButton = UIBarButtonItem(title: "Cancel", style: UIBarButtonItemStyle.plain, target: self, action: "cancelPressed")
        var spaceButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.flexibleSpace, target: nil, action: nil)
        toolBar.setItems([cancelButton, spaceButton, doneButton], animated: false)
        toolBar.isUserInteractionEnabled = true
        toolBar.sizeToFit()

        textField.delegate = self
        textField.inputAccessoryView = toolBar
    }
    func donePressed(){
        view.endEditing(true)
    }
    func cancelPressed(){
        view.endEditing(true) // or do something
    }
}

使用

override func viewDidLoad() {
      super.viewDidLoad()
      addToolBar(addressField)
 }