ios - 在 iOS 10 中更改 UIBarButtonItem 字体

Question

我有以下代码，该代码在将我的应用程序更新到 Swift3 之前可以正常工作。

    let barButtonsAppearanceDictionary: [String : AnyObject] = [NSFontAttributeName : UIFont.tangraText(withSize: 17)!,
                                                                NSForegroundColorAttributeName : UIColor.tangraBlue()]
    UIBarButtonItem.appearance().setTitleTextAttributes(barButtonsAppearanceDictionary, for: UIControlState())
    let barButtonsDisabledAppearanceDictionary: [String : AnyObject] = [NSFontAttributeName : UIFont.tangraText(withSize: 17)!,
                                                                        NSForegroundColorAttributeName : UIColor.lightGray]
    UIBarButtonItem.appearance().setTitleTextAttributes(barButtonsDisabledAppearanceDictionary, for: .disabled)

    UINavigationBar.appearance().titleTextAttributes = [NSForegroundColorAttributeName : UIColor.tangraBlue(),
                                                        NSFontAttributeName : UIFont.tangraText(withSize: 22)!]
    UINavigationBar.appearance().tintColor = UIColor.tangraBlue()

它应该更改导航栏项目的字体和颜色，但它不再起作用了。问题不在于字体，因为它在整个应用程序中正确显示。有什么想法吗？

Answer 1

尝试此代码:在 Xcode 8 中测试:

在viewdidLoad中:

   navigationController?.toolbar.setBackgroundImage(UIImage(), forToolbarPosition: UIBarPosition.any, barMetrics: UIBarMetrics.default)
   navigationController?.toolbar.barStyle = UIBarStyle.default
   navigationController?.toolbar.tintColor = UIColor.red
   navigationController?.toolbar.backgroundColor = UIColor.green

更新:

应用程序委托(delegate):

 UIBarButtonItem.appearance().setTitleTextAttributes([NSFontAttributeName: UIFont(name: "Villa", size: 25.0)!], for: UIControlState.normal)

使用自定义字体的代码的输出: