swift - 向 UITabBarController 添加自定义按钮(在中心添加按钮)

Question

我正在尝试用我制作的一些图像制作自定义标签栏，但我遇到了一些麻烦。我正在尝试向标签栏添加一个按钮，但似乎我做不到。我想做这样的事情:

然后向该按钮添加一些动画。我该如何去添加那个按钮？我需要继承 UITabBarController 吗？谢谢!

Answer 1

在 TabbarController 类中，添加这段代码

override func viewDidLoad() {
    super.viewDidLoad()
    setupMiddleButton()

}




// MARK: - AddButton

func setupCenterButton() {
    let centerButton = UIButton(frame: CGRect(x: 0, y: 10, width: 45, height: 45))

    var centerButtonFrame = centerButton.frame
    centerButtonFrame.origin.y = (view.bounds.height - centerButtonFrame.height) - 2
    centerButtonFrame.origin.x = view.bounds.width/2 - centerButtonFrame.size.width/2
    centerButton.frame = centerButtonFrame

    centerButton.layer.cornerRadius = 35
    view.addSubview(centerButton)

    centerButton.setBackgroundImage(#imageLiteral(resourceName: "tabPost"), for: .normal)
    centerButton.addTarget(self, action: #selector(centerButtonAction(sender:)), for: .touchUpInside)

    view.layoutIfNeeded()
}

// MARK: - Center button Actions

@objc private func centerButtonAction(sender: UIButton) {
    selectedIndex = 2
}

它会工作..:)