将UIToolBar添加到所有键盘(快速)

问题描述

我正在尝试以最少的重复次数向所有键盘添加自定义UIToolBar.我目前的操作方式要求我将代码添加到所有viewDidLoads中，并将每个文本字段的委托分配给我正在使用的viewController.我尝试创建自己的UIToolBar子类，但是当我的完成"和取消"按钮的目标是自视图时，我发现无法真正做到这一点.有没有人建议创建易于重用的工具栏?提前致谢.

I'm trying to add a custom UIToolBar to all of my keyboards with as little repetition. The way I'm currently doing it requires me to add the code to all my viewDidLoads and assign every textfield's delegate to the viewController I'm using. I have tried creating my own UIToolBar subclass but I find that I can't really do that when the target for my "Done" and "cancel" buttons are the self view. Does anyone have any suggestions for creating an easily reusable toolbar? Thanks in advance.

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

推荐答案

感谢Glorfindel的建议和ncerezo的示例代码，我使用扩展程序解决了我的问题.

Thanks to Glorfindel's suggestion and ncerezo's sample code I solved my problem using extensions.

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
    }
}

尽管我仍然需要在所有文本字段上调用以下代码.我觉得有一种更好的方法，而不必在每个textField上调用该函数，但是现在这绝对是更可重用的.

Though I still need to call the code below on all of my textfields. I feel like there may be a better way without having to call the function on every textField, but for now this is definitely more reusable.

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

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