如何增加UITabbar的大小

import UIKit

class CustomTabBarController: UITabBarController {

    override func viewDidLoad() {
        super.viewDidLoad()

        // 设置UITabBar的大小
        tabBar.frame = CGRect(x: 0, y: 0, width: 320, height: 60)
    }
}

override func viewDidLoad() {
    super.viewDidLoad()

    // 设置UITabBar的大小
    tabBar.frame = CGRect(x: 0, y: 0, width: 320, height: 60)
}

import UIKit

class CustomTabBar: UIView {

    override init(frame: CGRect) {
        super.init(frame: frame)

        // 添加自定义视图和按钮
        // ...
    }

    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

override func viewDidLoad() {
    super.viewDidLoad()

    // 使用自定义视图替换UITabBar
    let customTabBar = CustomTabBar()
    customTabBar.frame = CGRect(x: 0, y: 0, width: 320, height: 60)
    view.addSubview(customTabBar)
}