navigationbar

问题 Currently, I haven't found a way to do this for iOS 12.0. I've tried setting bar tint like so. [mailController.navigationBar setTintColor:[UIColor whiteColor]]; Then, I tried setting the title text attribute with the following code [mailController.navigationController.navigationBar setTitleTextAttributes: @{NSForegroundColorAttributeName:[UIColor WhiteColor]}; I've tried more options that I found on StackOverflow, but none of them worked. I am hoping that someone found a reliable way to

问题 I want to create a navigation bar similar to this site's: http://www.mysupermarket.co.uk/#/shelves/top_offers_in_asda.html Can anyone tell me how to create that navigation bar, which follows you as you scroll the page down, but not following you at the initial loading of page? When you access to the given website, try to scrolling down and you will understand what I am talking about. The navigation bar that consists of MY SHOP, OFFERS, IDEAS & LIFESTYLE, BAKERY and so-on... I have really no

问题 How can I hide the Android Navigation Bar in React Native? I'm referring to the bar at the bottom of the screen that has the software back button and home button, not the component at the top of the page that comes with the Navigator Component. This page on android.com explains how to do it for native developers. Can someone explain how to accomplish this via React Native apps? Thanks. 回答1: If you're looking to achieve this permanently you'll have to hide the Navbar when the app is created

问题 Earlier, I was using iOS 6.1 for my project. Recently I have switched to iOS 7. For, a lot of changes I knew, I updated my code.. But I have observed a strange behavior. My view on every screen gets hidden below navigation bar. Repositioning view solves the problem for iOS7, but creates problems for older iOS versions. Can anyone explain me, what is the reason and why does it happen?? What has been changed in iOS 7 that's causing this problem?? Any help would be appreciated.. 回答1: Try

问题 I have made simple navigation pages. Now I want to add icon for android in navigation bar. I added an screenshot and highlighted with black circle where i want to add an icon. I also tried custom renderer. That is provided answer from this post: Change icon on Navigation bar - Xamarin.Forms Android But not worked for me. Here it is 回答1: [assembly: ExportRenderer(typeof(NavigationPage), typeof(CustomMapRenderer))] namespace XamarinFormsMaps.Droid { public class CustomMapRenderer :

问题 I use: self.navigationController?.navigationBar.shadowImage = UIImage() to remove the border of a navigationBar earlier in my app but now I'm not sure to add the border back on a later screen. 回答1: To reset the navigationBar 's shadowImage to the default shadowImage do the following: self.navigationController?.navigationBar.shadowImage = UINavigationBar().shadowImage 来源： https://stackoverflow.com/questions/57401651/how-to-add-a-border-to-swift-navigationbar-after-removing-it

问题 Good day, I need to change the command from back button located on Navigation Bar on Android cellphones, like the imagem bellow? I need to change the button to appear a message, "Do you really want to quit the application?" .To confirm the user leave the program. Anyone can help? Thanks. 回答1: Use the WillPopScope widget to handle the back button action, example : class TestingWidget extends StatefulWidget { @override TestingWidgetState createState() { return new TestingWidgetState(); } }

问题 I hide the navigation bar (see below) but when I press the menu button on action bar the navigation bar immediately appear. Can I hide nav. bar permanently? @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); getWindow().getDecorView().setSystemUiVisibility( View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |

问题 I am trying to create Navigation bar in bootstrap. Have added customized styles in bootstrap-theme.min.css file. This way I am able to created navigation bar but dropdown menu items get hide behind main menu in small screen devices. The code and screenshots of output are as below: Styles added in bootstrap-theme.min.css file: #custom-bootstrap-menu.navbar-default .navbar-brand { color: rgba(255, 255, 255, 1); } #custom-bootstrap-menu.navbar-default { font-size: 14px; background-image:url(

问题 I got a problem, I need to build something similar to this, where the red bar is a UIImageView and the blue bar is the navigation bar: http://imagizer.imageshack.us/v2/800x600q90/30/iqtt.png I was able to make it with the following code, my problem is that when I press home button to close the app and reopen it, my navigation bar shrinks, on the link image it has 88px and after relaunch 44px, so it mess with my layout. Here is the code I've used on viewDidAppear: - (void)viewDidAppear:(BOOL