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我有一個應用程序，其中有一個故事板上的webview，加載ASP註冊表單，所以當鍵盤或選擇器出現時，導航欄隱藏，但永不回來，所以我不能回到最後一頁。如何防止鍵盤出現ios時導航欄隱藏？
這裏是我的代碼：
import UIKit
class BannerViewController: UIViewController {
@IBOutlet var webView11: UIWebView!
override var preferredStatusBarStyle: UIStatusBarStyle {
return .default
}
override var prefersStatusBarHidden: Bool {
return false
}
override func viewWillAppear(_ animated: Bool) {
self.navigationItem.setHidesBackButton(false, animated: true)
self.setNeedsStatusBarAppearanceUpdate()
self.navigationController?.navigationBar.barTintColor = UIColor(red: 0, green: 0.38, blue: 0.667, alpha: 1)
self.navigationController?.navigationBar.tintColor = UIColor(red: 1, green: 1, blue: 1, alpha: 1)
var titleTextAttributes = [String : AnyObject]();
titleTextAttributes[NSFontAttributeName] = UIFont.systemFont(ofSize: 17, weight: UIFontWeightSemibold)
titleTextAttributes[NSForegroundColorAttributeName] = UIColor(red: 1, green: 1, blue: 1, alpha: 1)
self.navigationController?.navigationBar.titleTextAttributes = titleTextAttributes
}
override func viewDidLoad() {
super.viewDidLoad();
self.navigationController?.navigationBar.barStyle = .default
self.setNeedsStatusBarAppearanceUpdate()
self.navigationController?.setNavigationBarHidden(false, animated: true)
self.webView11.delegate = self;
if let unwrappedwebView11 = URL(string: "http://www.stackoverflow") {
self.webView11.loadRequest(URLRequest(url: unwrappedwebView11))
}
}
}
extension BannerViewController: UIWebViewDelegate {
}