要解决AVPlayerViewController在从全屏返回后忽略所有触摸的问题，可以使用以下代码示例：

1. 首先，创建一个自定义的AVPlayerViewController子类，例如CustomPlayerViewController：

import UIKit
import AVKit

class CustomPlayerViewController: AVPlayerViewController {
    
    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        
        // 添加手势识别器
        let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleTapGesture(_:)))
        self.view.addGestureRecognizer(tapGesture)
    }
    
    @objc func handleTapGesture(_ gesture: UITapGestureRecognizer) {
        // 从全屏返回后忽略所有触摸
        if presentingViewController != nil && gesture.state == .ended {
            return
        }
        
        // 处理其他触摸事件
        // ...
    }
}

2. 然后，在需要使用AVPlayerViewController的地方，使用CustomPlayerViewController代替AVPlayerViewController：

import UIKit
import AVKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 创建AVPlayer对象和AVPlayerItem对象
        let player = AVPlayer(url: URL(string: "https://example.com/video.mp4")!)
        let playerItem = AVPlayerItem(player: player)
        
        // 创建CustomPlayerViewController
        let customPlayerViewController = CustomPlayerViewController()
        customPlayerViewController.player = player
        customPlayerViewController.player?.replaceCurrentItem(with: playerItem)
        
        // 显示CustomPlayerViewController
        present(customPlayerViewController, animated: true, completion: nil)
    }
}

通过以上代码，CustomPlayerViewController在从全屏返回后将忽略所有触摸事件。你可以根据自己的需求在handleTapGesture函数中处理其他触摸事件。