iOS Swift 按钮文本不会在单击时更改

Question

    import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var buttonText: UIButton!


    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.


    }
    @IBAction func btnButtonACTION(sender: UIButton) {
        buttonText.setTitle("changetext", forState: .Normal)

    }
}

我正在尝试通过 Xcode 学习 Swift 语言的基础知识。我的想法是在单击按钮时更改按钮文本。但它不会改变。有什么我错过的吗？

Answer 1

您正在使用:

buttonText.setTitle("changetext", forState: .Normal)

试试这个:

buttonText.setTitle("changetext", forState: UIControlState.Normal)