ios - Swift中的圆形UIBarButtonItems

我试图在Swift中绕过UIBarButtonItem(在大多数应用程序中都看到这种通知计数器)。我知道该怎么做，但实际上只有在将的宽度设置为34并将高度设置为24 时，它实际上才是圆形的。这些是UIBarButtonItems的魔术数字吗？如果我为其他设置宽度或高度(相同，我希望的帧为30 x 30)，然后根据宽度计算 cornerRadius ，则不是完美的圆形，而是圆角的矩形。我做错了什么？我的代码如下:

        let button = UIButton(type: .custom)
        button.frame = CGRect(x: 0, y: 0, width: 34, height: 24)
        button.backgroundColor = DarkModeUtil.isDarkMode() ? UIColor.white : UIColor.black
        button.setTitle("\(self.pickedAppActions.count > 9 ? "9+" : "\(self.pickedAppActions.count)")", for: .normal)
        button.setTitleColor(DarkModeUtil.isDarkMode() ? .black : UIColor.white, for: .normal)
        button.contentHorizontalAlignment = .center
        button.titleLabel?.fitSize()
        button.layer.cornerRadius = button.bounds.size.width / 2
        button.clipsToBounds = true
        button.addTarget(self, action: #selector(counterTapped(_:)), for: [.touchUpInside])

        let doneItem = UIBarButtonItem(image: UIImage(named: "done")?.withRenderingMode(.alwaysTemplate), style: .plain, target: self, action: #selector(doneButtonClicked(_:)))
        doneItem.tintColor = DarkModeUtil.isDarkMode() ? .white : .black

        let counterButton = UIBarButtonItem(customView: button)
        let buttons:[UIBarButtonItem] = [doneItem,counterButton]
        self.navigationItem.rightBarButtonItems = buttons

如果我设置了相同的宽度和高度，例如30 x 30，则会得到如下所示的按钮:

最佳答案

使高度和宽度34对我有用。这是一个代码。也无需更改button.frame.size.width / 2。

 let button = UIButton(type: .custom)
    button.frame = CGRect(x: 0, y: 0, width: 34, height: 34)
    button.backgroundColor = DarkModeUtil.isDarkMode() ? UIColor.white : UIColor.black
    button.setTitle("\(self.pickedAppActions.count > 9 ? "9+" : "\(self.pickedAppActions.count)")", for: .normal)
    button.setTitleColor(DarkModeUtil.isDarkMode() ? .black : UIColor.white, for: .normal)
    button.contentHorizontalAlignment = .center
    button.titleLabel?.fitSize()
    button.layer.cornerRadius = button.bounds.size.width / 2
    button.clipsToBounds = true
    button.addTarget(self, action: #selector(counterTapped(_:)), for: [.touchUpInside])

    let doneItem = UIBarButtonItem(image: UIImage(named: "done")?.withRenderingMode(.alwaysTemplate), style: .plain, target: self, action: #selector(doneButtonClicked(_:)))
    doneItem.tintColor = DarkModeUtil.isDarkMode() ? .white : .black

    let counterButton = UIBarButtonItem(customView: button)
    let buttons:[UIBarButtonItem] = [doneItem,counterButton]
    self.navigationItem.rightBarButtonItems = buttons

关于ios - Swift中的圆形UIBarButtonItems，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/59927614/