在有约束的UIView中移动UITextField

import UIKit

class ViewController: UIViewController {
    @IBOutlet weak var textField: UITextField!
    @IBOutlet weak var viewWithConstraints: UIView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 添加拖动手势识别器
        let panGesture = UIPanGestureRecognizer(target: self, action: #selector(handlePan(_:)))
        textField.addGestureRecognizer(panGesture)
    }
    
    @objc func handlePan(_ gesture: UIPanGestureRecognizer) {
        let translation = gesture.translation(in: viewWithConstraints)
        
        // 更新UITextField的约束
        textField.center = CGPoint(x: textField.center.x + translation.x, y: textField.center.y + translation.y)
        gesture.setTranslation(CGPoint.zero, in: viewWithConstraints)
    }
}