Xamarin: Visual Studio Start iOS app always terminates (found work-around) - xamarin

Question

Xamarin Noob
Xamarin.Forms Noob
I am all hooked up. Business license on iOS and Android and developing from VS 2013.
I created the initial sample from the Xamarin Intro to Forms.
I 'Start'ed the app and it ran fine on my Mac. I saw the 'Hello, Forms !' label in the running app in the iOS simulator on my Mac Build Machine.
I then replaced the following code in my App.cs
public static Page GetMainPage()
{
return new ContentPage
{
Content = new Label
{
Text = "Hello, Forms !",
VerticalOptions = LayoutOptions.CenterAndExpand,
HorizontalOptions = LayoutOptions.CenterAndExpand,
},
};
}
with:
public static Page GetMainPage()
{
return new ContentPage()
{
Content = new StackLayout
{
Spacing = 10,
Children =
{
new Label
{
Text = "Stop",
BackgroundColor = Color.Red,
Font = Font.SystemFontOfSize(20)
},
new Label
{
Text = "Slow down",
BackgroundColor = Color.Yellow,
Font = Font.SystemFontOfSize(20)
},
new Label
{
Text = "Go",
BackgroundColor = Color.Green,
Font = Font.SystemFontOfSize(20)
}
}
}
};
}
That's all I did, but now the app will not run in the simulator - it always exists as soon as it starts...
I put the original code back again, and it still doesn't start.
I always see (in My VS 12013 Mac Server Log)
[10-Nov-2014 15:43:32] Request handled in 4.129ms
[10-Nov-2014 15:43:37] Request handled in 3.728ms
[10-Nov-2014 15:43:40] stdout: Starting iPhone 5s
Launching application
Application launched. PID = 2872
Press enter to terminate the application
>
Application Terminated
[10-Nov-2014 15:43:42] Request handled in 3.898ms
[10-Nov-2014 15:43:48] Request handled in 4.031ms
etc....
I have exited both the iOS simulator and VS 2013, paired them again, all to no avail...
What could possibly be wrong?
EDIT
Infact, when the app becomes visible in the simulators view of icons, clicking it brings up the original version of "Hello, Forms!" - so my new code is never deployed to the simulator...
EDIT 2
Ok, I got the new content moving and got it running:
I had to manually "Reset content on device" in the iOS simulator on the Mac.
I also had to manually clean each project in VS 2013 - just rebuilding the solution doesn't do anything to the content being sent to the Mac iOS simulator server, I guess.
I hope this helps someone as new as I am.

Answer 1

Try removing "." from your app's name in Info.plist file.

Answer 2

After fiddling..
The way to fix this is to change the build config on the solution.
In a fresh Xamarin.Forms solution in Visual Studio, you might have:
Solution 'MyXFormsSample' (3 projects)
v MyXFormsSample (Portable)
> Properties
> References
> App.cs
packages.config
> MyXFormsSample.Android
> MyXFormsSample.iOS
It seems that by default, in the solution's Configuration Manager's build configuration, the portable code project is not set to build for the iPhoneSimulator platform
I clicked that on for the debug, and also release, solution configurations, and still I had to Reset Content on the Mac's iOS simulator before debugging, then all I had to do was press the green 'Start' button in the menu - all was updated and released to the Mac Build server's iOS Simulator.