ios - UIImagePickerController 中的左右 barButtons 字体

Question

如何为UIImagePickerController的左右UIBarButton设置自定义字体？

我已经尝试过这段代码，但它不起作用:

let imagePicker = UIImagePickerController()
imagePicker.navigationBar.barTintColor = UIColor(hex: 0x212121)
imagePicker.navigationBar.translucent = false
imagePicker.navigationBar.tintColor = UIColor.whiteColor()
imagePicker.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName: UIColor.whiteColor(), NSFontAttributeName: UIFont(name: "Roboto-Regular", size: 20.0)!]

// doesn't work
imagePicker.navigationItem.backBarButtonItem?.setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.whiteColor(), NSFontAttributeName: UIFont(name: "Roboto-Regular", size: 25.0)!], forState: UIControlState.Normal)
imagePicker.navigationItem.leftBarButtonItem?.setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.whiteColor(), NSFontAttributeName: UIFont(name: "Roboto-Regular", size: 20.0)!], forState: UIControlState.Normal)
imagePicker.navigationItem.rightBarButtonItem?.setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.whiteColor(), NSFontAttributeName: UIFont(name: "Roboto-Regular", size: 20.0)!], forState: UIControlState.Normal)

Answer 1

您将需要子类化 UIImagePickerController 并设置您自己的工具栏。

苹果有一个很好的例子:https://developer.apple.com/library/ios/samplecode/PhotoPicker/Introduction/Intro.html

它是用 Objective-C 编写的，但我相信它会让你了解你需要做什么。