Error when deploying Xamarin.Forms iOS App with XAML Hot Restart

Asked 30/11, 2020 at 18:50 Answered 17/1, 2023 at 17:3

I am trying to use Xamarin.Forms with Hot Restart to develop an iOS App, but I keep get the following error when running the app from Visual Studio:

An error occurred while trying to deploy the app 'TestApp2.iOS.app'. Details: Error running hotrestart: 'An error occurred while deploying the application 'TestApp2.iOS.app' into 'iPhone'. Details: Could not write content to file 'PublicStaging/com.companyname.TestApp2'. ErrorCode: EmptyResponse'. Command: 'deploy -u=00000XXX-001D4C6XXXXXXXXX -i=com.companyname.TestApp2 -n=TestApp2.iOS.app'

Details:

Visual Studio v16.8.2 (and v16.9.0 Preview 1.0) on Windows 10
Xamarin.Forms v4.8.0.1687
Xamarin.Essentials v1.5.3.2
I used "Create new project" in VS, with the template "Mobile App (Xamarin.Forms)" (Only iOS, no Android). I've not done any manual changes to the project after it was created.
I have enabled Hot Restart via Tools -> Options -> Environment -> Preview Features -> Enable Xamarin Hot Restart
The phone is connected to the PC via USB cable and I can see the name of my phone appear on the "Play Button" in Visual studio.
I do not see any activity on my phone and nothing in the VS device log that seems related.

Any help would be much appreciated!

Kendrakendrah answered 30/11, 2020 at 18:50 Comment(0)

The phone is connected to the PC via USB cable and I can see the name of my phone appear on the "Play Button" in Visual studio.

You need a Mac and Pair to Mac for Xamarin.iOS development. Then we will see the following screenshot:

Now you can select one device from the device list to run.

================================update================================

First, enable hot restart in visual stuido 2019(here version is 16.8.2). Not forgert to restart the visual studio after enabling it.

Second, make sure the iTunes has logined a paid apple account and connect a physical device via usb.

Third, set iOS as the startup project, then you will see your physical device:

Last, setting provisioning file in ios Bndele Signing:

Now you can run it in your physical device.

Splendiferous answered 1/12, 2020 at 2:33 Comment(10)

I thought with the new Hot Reload functionality you didn't need a Mac in order to run a development build on a device? – Bemock 1/12, 2020 at 8:48

@Bemock No, you also need a Mac to run the program. – Splendiferous 1/12, 2020 at 9:23

I realized I was mixing together Hot Reload and Hot Restart. It was my impression after reading about Hot Restart that you could do that from a Windows PC. For example here: nicksnettravels.builttoroam.com/ios-dev-no-mac I also watched this video on channel9: channel9.msdn.com/Shows/XamarinShow/… Would it be correct to say that I still need to do the initial deploy to the phone from a Mac and then I can use a Windows PC to deploy changes to the app using Hot Restart? – Kendrakendrah 2/12, 2020 at 15:16

@Kendrakendrah Hi, you are using a preview version of visual stuido 2019? – Splendiferous 3/12, 2020 at 2:12

I've tried both the latest stable version (v16.8.2) and 16.9.0 Preview 1.0 – Kendrakendrah 3/12, 2020 at 16:34

@Kendrakendrah Hi, I have tried in my visual studio (16.8.2), and it works. Whether you use a paid apple account and select the matching provisioning file. – Splendiferous 4/12, 2020 at 7:22

@Kendrakendrah I have updated the asnwer, you could have a look at that when you have time. – Splendiferous 4/12, 2020 at 7:34

Thank you for the effort but I am afraid I still get the same error. I have tried restart of everything and to recreate the project. Everything works fine until I get the deploy error – Kendrakendrah 4/12, 2020 at 19:50

@Kendrakendrah What device are you testing? You could have a check witht the limitations whether contains some points.learn.microsoft.com/en-us/xamarin/xamarin-forms/deploy-test/… – Splendiferous 7/12, 2020 at 1:36

That is false u do not need a mac paired for hot reload hot reload should work with just a developer account thats the whole point and a iphone – Abukir 30/1, 2022 at 0:53

try to clear trusted computers on your iPhone, under Settings->Developer->Paired Devices, then reconnect the phone. It worked for me.

Maggee answered 7/9, 2022 at 8:51 Comment(0)

You don't need a mac to debug on physical device any more. There are some limitations but it works. Here are the best set up instructions I found so far: https://nicksnettravels.builttoroam.com/ios-dev-no-mac/

After following these instructions I was getting similar error. In my case it was ReSharper build runner that I had to disable and it all worked.

Against answered 17/1, 2023 at 17:3 Comment(0)

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