我正在嘗試以模態方式呈現導航控制器，問題是我的導航欄沒有顯示任何 baritems ......有什么想法嗎？這是我的代碼。如果我將背景顏色添加到它實際顯示的導航欄，而不是按鈕...請幫助！
if let navigationController = baseController as? UINavigationController {
if UIScreen.main.traitCollection.userInterfaceIdiom == .phone {
navigationController.present(webViewController, animated: true, completion: nil)
} else {
let webNavigationController = UINavigationController(rootViewController: webViewController)
webNavigationController.navigationItem.leftBarButtonItem = UIBarButtonItem(title: "Back", style: .plain, target: self, action: #selector(cancelTapped))
webNavigationController.isNavigationBarHidden = false
webNavigationController.modalPresentationStyle = .overFullScreen
navigationController.present(webNavigationController, animated: true, completion: nil)
}
}
uj5u.com熱心網友回復：
這一行是錯誤的：
webNavigationController.navigationItem.leftBarButtonItem = UIBarButtonItem(...
它不是由誰決定欄按鈕專案webNavigationController的navigationItem存在，而是webViewController.
轉載請註明出處，本文鏈接：https://www.uj5u.com/houduan/448208.html
標籤：IOS 迅速 用户界面控制器 导航控制器 模态视图控制器