当我点击tabBarItem“书签”时，我期望下面的代码块将被打印：“select tabbar item”，不要打印“root view tapped“。
但实际上console打印“root view tapped”。有人能告诉我为什么它没有像我预期的那样工作，以及如何修复它吗？
顺便说一下，我确实问了chatGPT，但没有得到正确的答案。
下面是完整的代码

import UIKit
import RxSwift
import RxCocoa

class TabBarViewController: UIViewController {
    private let disposeBag = DisposeBag()
    
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // create a UITabBar 
        let tabBar = UITabBar()
        self.view.addSubview(tabBar)
        tabBar.translatesAutoresizingMaskIntoConstraints = false
        tabBar.rightAnchor.constraint(equalTo: self.view.rightAnchor).isActive = true
        tabBar.leftAnchor.constraint(equalTo: self.view.leftAnchor).isActive = true
        tabBar.bottomAnchor.constraint(equalTo: self.view.bottomAnchor).isActive = true
        let item1 = UITabBarItem(tabBarSystemItem: UITabBarItem.SystemItem.bookmarks, tag: 1)
        let item2 = UITabBarItem(tabBarSystemItem: UITabBarItem.SystemItem.contacts, tag: 2)
        tabBar.items = [item1, item2]
        self.view.bringSubviewToFront(tabBar)
        
        // create a red container view
        let red = UIView()
        red.backgroundColor = UIColor.red
        self.view.addSubview(red)
        red.translatesAutoresizingMaskIntoConstraints = false
        red.rightAnchor.constraint(equalTo: self.view.rightAnchor).isActive = true
        red.leftAnchor.constraint(equalTo: self.view.leftAnchor).isActive = true
        red.bottomAnchor.constraint(equalTo: tabBar.topAnchor).isActive = true
        red.heightAnchor.constraint(equalTo: tabBar.heightAnchor).isActive = true
        
        
        
        
        tabBar.rx.didSelectItem.subscribe(onNext: { e in
            print("select tabbar item ")
        })
        .disposed(by: disposeBag)
        
        
        red.rx.tapGesture()
            .when(.recognized)
            .subscribe { ele in
                print("red tapped")
            }
            .disposed(by: disposeBag)
        
        
        view.rx.tapGesture(configuration: { tapGestureRecognizer, delegate in
            delegate.simultaneousRecognitionPolicy = .never
        })
        .when(.recognized)
        .subscribe(onNext: { ele in
            print("root view tapped ")
        })
        .disposed(by: disposeBag)
    }
    
    
}