Swift UIView zPosition问题，视图与其他视图重叠

view.layer.transform = CATransform3DMakeTranslation(0, 0, 0.001)

view.layer.zPosition = 1.0

import UIKit

class ViewController: UIViewController {
    
    let view1 = UIView()
    let view2 = UIView()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 设置视图属性
        view1.backgroundColor = .red
        view2.backgroundColor = .blue
        
        // 添加到父视图
        view.addSubview(view1)
        view.addSubview(view2)
        
        // 设置初始位置
        view1.frame = CGRect(x: 50, y: 50, width: 100, height: 100)
        view2.frame = CGRect(x: 75, y: 75, width: 100, height: 100)
        
        // 启用3D变换
        view.layer.transform = CATransform3DMakeTranslation(0, 0, 0.001)
        
        // 设置zPosition
        view1.layer.zPosition = 1.0
        view2.layer.zPosition = 2.0
    }
}