在IOS中单击时更改按钮文本和背景颜色

import UIKit

class ViewController: UIViewController {
    var button: UIButton!

    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 创建按钮
        button = UIButton(type: .system)
        button.frame = CGRect(x: 100, y: 100, width: 200, height: 50)
        button.setTitle("点击我", for: .normal)
        button.backgroundColor = UIColor.blue
        button.addTarget(self, action: #selector(buttonClicked), for: .touchUpInside)
        self.view.addSubview(button)
    }
    
    @objc func buttonClicked() {
        // 更改按钮的文本和背景颜色
        button.setTitle("已点击", for: .normal)
        button.backgroundColor = UIColor.red
    }
}