如何在 iOS 12 的 MFMailComposeViewController 中更改 UINavigationBar 的标题颜色？
这就是我正在做的:
import MessageUI
extension MFMailComposeViewController {
open override func viewDidLoad() {
super.viewDidLoad()
navigationBar.isTranslucent = false
navigationBar.isOpaque = false
navigationBar.barTintColor = .white
navigationBar.tintColor = .white
navigationBar.titleTextAttributes = [.foregroundColor: UIColor.white]
}
}
在 iOS 10 中工作:
在 iOS 11 中工作:
在 iOS 12 中不工作:
/// UINavigationBar
let navBarAppearance = UINavigationBar.appearance()
navBarAppearance.barTintColor = .red
navBarAppearance.tintColor = .white
navBarAppearance.backgroundColor = .red
navBarAppearance.titleTextAttributes = [
.foregroundColor: UIColor.white,
.font: UIFont.systemFontSize
]
navBarAppearance.largeTitleTextAttributes = [
.foregroundColor: UIColor.white,
.font: UIFont.smallSystemFontSize
]
let barButtonAppearance = UIBarButtonItem.appearance()
barButtonAppearance.setTitleTextAttributes([.font: UIFont.systemFontSize], for: .normal)
navBarAppearance.isTranslucent = false
if #available(iOS 13.0, *) {
let appearance = UINavigationBarAppearance()
appearance.configureWithOpaqueBackground()
appearance.backgroundColor = navBarAppearance.backgroundColor
appearance.titleTextAttributes = navBarAppearance.titleTextAttributes ?? [:]
appearance.largeTitleTextAttributes = navBarAppearance.largeTitleTextAttributes ?? [:]
navBarAppearance.standardAppearance = appearance
navBarAppearance.scrollEdgeAppearance = appearance
}