Entering text into textfield causing uipangesture object to move back to its orginal position

问题

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Just get a a uiimageview to move using uipangesutre and when text is enter into the textfield. The imageview does not return to its original position.

My swift code below has a image view connected to a pangesture. When something is entered into a textfield when after the image view is moved. The image view reverts back to its original position.The gif represents that what is going on. I just don't want the effect of the pangesutre to be nullified after text is entered into the textfield.

LINK TO GITHUB https://github.com/redrock34/sse

import UIKit

class ViewController: UIViewController {

    var pic = UIImageView()
    let fight = (0..<10).map { _ in UIImageView() }
    var textEnter = UITextField()
    var g2 = UIPanGestureRecognizer()

    var slider = UISlider()

    override func viewDidLoad() {
        super.viewDidLoad()

        fight[0].image  = UIImage(named: "a.png")

        fight.forEach{
            $0.isUserInteractionEnabled = true
        }
        [slider,textEnter].forEach{
            $0.translatesAutoresizingMaskIntoConstraints = false
            view.addSubview($0)

            $0.backgroundColor = .blue
        }

        slider.backgroundColor = .clear

        g2 = UIPanGestureRecognizer(target: self, action: #selector(ViewController.g1Method))
        fight[0].addGestureRecognizer(g2)

        pic.backgroundColor = .clear
        pic.backgroundColor = .systemGreen

        fight.forEach{
            $0.backgroundColor = .clear
            view.addSubview($0)
            $0.translatesAutoresizingMaskIntoConstraints = false
        }            

        [pic].forEach{

            view.addSubview($0)
            $0.translatesAutoresizingMaskIntoConstraints = false                
        }

        // Do any additional setup after loading the view.
        NSLayoutConstraint.activate ([

            pic.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant :0),
            pic.topAnchor.constraint(equalTo: fight[0].bottomAnchor, constant : 0),

            pic.heightAnchor.constraint(equalTo: view.heightAnchor, multiplier: 0.62, constant: 0),
            pic.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant : 0),

            textEnter.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant :0),
            textEnter.topAnchor.constraint(equalTo: view.topAnchor, constant : 0),
            textEnter.heightAnchor.constraint(equalTo: view.heightAnchor, multiplier: 0.1, constant: 0),
            textEnter.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant : 0),

            fight[0].trailingAnchor.constraint(equalTo: view.trailingAnchor, constant :0),
            fight[0].topAnchor.constraint(equalTo: textEnter.bottomAnchor, constant : 0),

            fight[0].heightAnchor.constraint(equalTo: view.heightAnchor, multiplier: 0.10, constant: 0),
            fight[0].widthAnchor.constraint(equalTo: view.widthAnchor, multiplier: 0.10, constant: 0),
            fight[0].leadingAnchor.constraint(equalTo: view.leadingAnchor, constant : 0),

            slider.topAnchor.constraint(equalTo: pic.bottomAnchor, constant : 0),

            slider.heightAnchor.constraint(equalTo: view.heightAnchor, multiplier: 0.08, constant: 0),
            slider.widthAnchor.constraint(equalTo: view.widthAnchor, multiplier: 1, constant: 0),
            slider.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant : 0),

        ])
        textEnter.textAlignment = .center

        self.view.sendSubviewToBack(pic)
    }

    @objc func g1Method(_ sender: UIPanGestureRecognizer){

        let tranistioon = sender.translation(in: self.view)
        sender.view!.center = CGPoint(x: sender.view!.center.x + tranistioon.x, y: sender.view!.center.y + tranistioon.y)
        sender.setTranslation(CGPoint.zero,in: self.view)    }
}

来源：https://stackoverflow.com/questions/60271523/entering-text-into-textfield-causing-uipangesture-object-to-move-back-to-its-org