Swift iOS -如何制作覆盖TabBarController和NavigationController的模糊效果

import UIKit
import CoreGraphics

let blurEffect = UIBlurEffect(style: .light)
let blurView = UIVisualEffectView(effect: blurEffect)
blurView.frame = view.bounds

tabBarController?.view.addSubview(blurView)

tabBarController?.view.bringSubviewToFront(blurView)

import UIKit
import CoreGraphics

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        
        let blurEffect = UIBlurEffect(style: .light)
        let blurView = UIVisualEffectView(effect: blurEffect)
        blurView.frame = view.bounds
        
        tabBarController?.view.addSubview(blurView)
        tabBarController?.view.bringSubviewToFront(blurView)
    }
}