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The title in the Navigation Bar in Navigation Pages Disappears when being set by either this.Title = "Title" in C# or Title="Title" in XAML. iOS 11 builds are unaffected.
Tested in Xamarin Forms: 184.108.40.2062.
Downgrading to Xamarin Forms v220.127.116.110 immediately fixes the problem.
Visual Studio Community 2017 for Mac
Version 7.1.5 (build 2)
Mono 18.104.22.168 (d15-3/14f2c81) (64-bit)
GTK+ 2.24.23 (Raleigh theme)
Package version: 502000224
Runtime: Not installed
SDK: Not installed
MSBuild SDKs: /Library/Frameworks/Mono.framework/Versions/5.2.0/lib/mono/msbuild/15.0/bin/Sdks
Speicherort: /Applications/Xamarin Profiler.app/Contents/MacOS/Xamarin Profiler
Apple Developer Tools
Xcode 9.0 (13247)
Version: 22.214.171.124 (Visual Studio Community)
Build date: 2017-09-15 02:25:56-0400
Version: 126.96.36.199 (Visual Studio Community)
4.0.3 (API-Ebene 15)
4.1 (API-Ebene 16)
4.2 (API-Ebene 17)
4.3 (API-Ebene 18)
4.4 (API-Ebene 19)
4.4.87 (API-Ebene 20)
5.0 (API-Ebene 21)
5.1 (API-Ebene 22)
6.0 (API-Ebene 23)
7.0 (API-Ebene 24)
7.1 (API-Ebene 25)
Version der SDK-Tools: 25.2.5
Version der SDK-Plattformtools: 25.0.5
Version der SDK-Buildtools: 25.0.2
Java SDK: /usr
java version "1.8.0_101"
Java(TM) SE Runtime Environment (build 1.8.0_101-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.101-b13, mixed mode)
Android Designer EPL-Code ist hier verfügbar:
Build date: Thu, 21 Sep 2017 19:52:53 GMT
Client compatibility: 1
Version: 188.8.131.52 (Visual Studio Community)
Release ID: 701050002
Git revision: 7afedcaef8e7542e70e3cf8f9bdb26938b8c0876
Build date: 2017-09-15 08:39:58-04
Xamarin addins: 3262aadf811a18c12eac6742532d052b0139a808
Build lane: monodevelop-lion-d15-3-xcode9
Mac OS X 10.12.6
Does this occur on a specific version of Android? We have not had reports of this issue in the prereleases and it doesn't appear to occur with the use of the most basic reproduction attempt.
This is on Android 7.0 on a Galaxy S6 Edge+.
I'm able to reproduce the issue every time.
1. Install Xamarin.Forms 184.108.40.2060
2. Clean & Rebuild project
3. Deploy on device
4. Navigation bar titles appear
5. Upgrade to Xamarin.Forms 220.127.116.112
6. Clean & Rebuild project
7. Deploy on device
6. Navigation bar titles no longer appear
any update on this yet?
No, not at the moment. I will have to see if we can get a hold of that specific device in question to test against.
Okay, someone was able to test this to see it occurs.
From what we can tell, this occurs when a TabbedPage is involved, but not a basic NavigationPage+ContentPage.
I get this happening on a Navigation Page + Content Page combo. I don't use Tabbed Pages.
We haven't reproduced this with that combination. We're going to need more info about specific devices, Android versions, and so on where that occurs.
The software configurations are listed in my first post, the device is a Samsung S6 Edge+ running Android 7.0.
It occurs when trying to show a ContentPage in a NavigationPage.
I'm not sure what more I can add. If there are specific things you would like to know, please shoot the questions off to me, I'll be happy to answer them.
I can add that this might have something to do with the theme.
My navigation page title text does not show up when I use:
but it does show with:
but it does show with:
This I can confirm happens to me too. This is a bug that still exists in 18.104.22.168203
I tried creating a sample project to post the issue to github, but could not reproduce the issue, even with changing the theme.
I'd suggest creating a repro project and posting to their github if you want them to look at this.
If anyone is still running into this bug you should be looking at changing your android base class. If you created your project a few years ago you're probably still using the ActionBarActivity base class. If you change that to a AppCompatActivity and also start using newer theme like @android:style/Theme.AppCompat.Light.DarkActionBar it should be fixed.
All newly created xamarin projects use this too, so you can peek at some of that code to see what your new mainactivity and styles should look like.
Hope this helps! :)
Thanks Rogier, I will test that out.
I had same issue but only sometimes (and on Android only) and it seems my problem was caused by using NavigationPage wrong. I changed from:
var MainPage = new MainPage(); // MainPage : TabbedPage
var Tab1 = new NavigationPage(new Tab1Page()); // Tab1Page : ContentPage
var Tab2 = new NavigationPage(new Tab2Page());
var MainPage = new NavigationPage(new MainPage());
var Tab1 = new Tab1Page();
var Tab2 = new Tab2Page();
Haven't stumbled upon this issue anymore.