检查UITextField中的更改 [英] Check for changes in UITextField

问题描述

我正在尝试制作一个应用程序，用于检查UITextField中的文本并执行某些操作以响应其中的内容。我可以让用户输入他们的输入然后按一个按钮。我希望能够在不使应用程序无响应的情况下持续检查文本字段。

I'm attempting to make an app that checks the text in a UITextField and does something in response to what is written in it. I could possibly have the user type their input and then press a button. I want to be able to check the text field constantly without the application becoming unresponsive.

推荐答案

您需要做的就是附加您的UITextField已发送事件的IBAction已更改编辑：

What you have to do is to attach an IBAction to your UITextField Sent Events Editing Changed:

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var strLabel: UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()
    }
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
    @IBAction func editingChanged(sender: UITextField) {
        strLabel.text = sender.text
    }
}

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