iOS:UIButton根据文本长度调整大小

import UIKit

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let button = UIButton(type: .system)
        button.setTitle("Button", for: .normal)
        
        // 计算文本长度
        let text = button.titleLabel?.text ?? ""
        let font = button.titleLabel?.font ?? UIFont.systemFont(ofSize: 17)
        let attributes = [NSAttributedString.Key.font: font]
        let textSize = (text as NSString).size(withAttributes: attributes)
        
        // 调整按钮大小
        let buttonWidth = textSize.width + 20 // 增加一些边距
        let buttonHeight = button.frame.height
        button.frame = CGRect(x: button.frame.origin.x, y: button.frame.origin.y, width: buttonWidth, height: buttonHeight)
        
        view.addSubview(button)
    }
}