文本字段更改的调用函数

时间:2017-12-25 04:27:57

标签: swift function call nstextfield

我希望在以任何方式编辑文本字段文本时调用函数。

我对swift和代码墙的新手并不能真正帮助我理解,而且我已经能够找到所有答案。

有人展示了自己按住Ctrl键点击文字字段,并按照“编辑确实开始”的名称显示已发送的操作。或类似的东西,但我只发出了一个叫做“行动”的行动。我需要澄清。

编辑:这适用于MacOS应用程序,UIKit无法正常工作。

import Cocoa

@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate, NSTextFieldDelegate {

    @IBOutlet weak var window: NSWindow!
    @IBOutlet weak var msgBox: NSTextField!
    @IBOutlet weak var keyBox: NSTextField!
    @IBOutlet weak var encBtn: NSButton!
    @IBOutlet weak var decBtn: NSButton!
    override func controlTextDidChange(_ obj: Notification) {
        //makeKey()
        keyBox.stringValue = "test"
    }

    override func controlTextDidBeginEditing(_ obj: Notification) {
        print("Did begin editing...")
    }

    func applicationDidFinishLaunching(_ aNotification: Notification) {
        // Insert code here to initialize your application
    }

    func applicationWillTerminate(_ aNotification: Notification) {
        // Insert code here to tear down your application
    }

    func makeKey() {
        keyBox.stringValue = "test"
    }
}

1 个答案:

答案 0 :(得分:1)

在macOS上,您与iOS类似NSTextFieldDelegate

步骤是:

1)将NSTextField实例拖放到窗口上。

2)将其代理人设置为NSViewController

Setting up delegate

3)让您的ViewController(或任何其他管理类)实施NSTextFieldDelegate,并实施任何所需的文本更改相关操作:

class ViewController: NSViewController, NSTextFieldDelegate {

    // Occurs whenever there's any input in the field
    override func controlTextDidChange(_ obj: Notification) {
        let textField = obj.object as! NSTextField
        print("Change occured. \(textField.stringValue)")
    }

    // Occurs whenever you input first symbol after focus is here
    override func controlTextDidBeginEditing(_ obj: Notification) {
        let textField = obj.object as! NSTextField
        print("Did begin editing... \(textField.stringValue)")
    }

    // Occurs whenever you leave text field (focus lost)
    override func controlTextDidEndEditing(_ obj: Notification) {
        let textField = obj.object as! NSTextField
        print("Ended editing... \(textField.stringValue)")
    }
}