显示 UIImagePickerController 时更新导航栏背景答案

【问题标题】：Updating Nav Bar background when displaying UIImagePickerController显示 UIImagePickerController 时更新导航栏背景
【发布时间】：2020-03-12 13:58:07
【问题描述】：

在我的AppDelegate 中，我将导航栏配置如下：

func setupNavBar() {
    let barAppearance = UINavigationBar.appearance()
    barAppearance.titleTextAttributes = [NSAttributedString.Key.foregroundColor: appRed]
    barAppearance.setBackgroundImage(UIImage(), for: UIBarMetrics.default)
    barAppearance.shadowImage = UIImage()
    barAppearance.isTranslucent = true
}

这很好用——直到我想从我的UIViewControllers 中显示一个UIImagePickerController——图像超出了栏，因为它是半透明的——我需要能够暂时将导航栏设置为白色，然后制作当拾取器控制器被拆除时，它再次透亮：

我尝试通过在代码中添加最后两行来解决此问题：

 let pickerController = UIImagePickerController()
    pickerController.delegate = self
    pickerController.allowsEditing = false
    pickerController.mediaTypes = ["public.image"]
    pickerController.sourceType = .savedPhotosAlbum
    self.navigationController?.navigationBar.backgroundColor = .white
    self.navigationController?.navigationBar.isTranslucent = false
    self.present(pickerController, animated: true, completion: nil)

这似乎不起作用。

【问题讨论】：

标签： ios swift uinavigationcontroller uinavigationbar uiimagepickercontroller

【解决方案1】：

试试这个：

let pickerController = UIImagePickerController()
pickerController.delegate = self
pickerController.allowsEditing = false
pickerController.mediaTypes = ["public.image"]
pickerController.sourceType = .savedPhotosAlbum
UINavigationBar.appearance().isTranslucent = false
self.present(pickerController, animated: true, completion: nil)

然后在图像选择器上关闭

UINavigationBar.appearance().isTranslucent = true

【讨论】：