About the custom control renderer?

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About the custom control renderer?

mc 7,186

If I create a custom control I have to create its rendererer in xamarin.android and xamarin.ios.

but In xamarin.forms not xamarin.android and xamarin.ios can there be three files that

view.iOS.cs,view.android.cs,view.cs be the three renderer ?

which means view.iOS.cs will be in ios.

I do not need to write the code in each project?

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Answer 1

JarvanZhang 23,971

Hello,

Welcome to our Microsoft Q&A platform!

I do not need to write the code in each project?

Sorry, we cannot do that. Xamarin.Forms user interfaces are rendered using the native controls of the target platform. For some extended functions, we need achieve it on each platform using the native code. So it'll be necessary to create the .cs file in each project.

Best Regards,

Jarvan Zhang

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mc 7,186 Reputation points

2021-06-07T06:32:39.18+00:00
But I find that there are many codes are in the same folder.

view1.android.cs view1.iOS.cs
JarvanZhang 23,971 Reputation points

2021-06-07T06:58:08.463+00:00

I couldn't find the similar code in my test project. Could you please post more details about the 'code'?
mc 7,186 Reputation points

2021-06-08T05:46:33.137+00:00

Then how to write a custom control and update it to the nuget? to use in xamarin.forms?
JarvanZhang 23,971 Reputation points

2021-06-08T08:00:15.823+00:00

Here are the normal steps to create a custom control and consume it in Xamarin.Forms:

1.Create a custom control in the shared project
2.Create custom renderer in each native platform and register the renderer
3.Achieve the function in the render class
4.Consume the custom control in the shared project, you could add the namespace to reference the control in xaml.

If you want to create a custom control for a view that is from a nuget, please veritfy if the nuget provides the interface. You cannot do that directly because the view cannot be accessed without the interface.
mc 7,186 Reputation points

2021-06-08T08:57:06.09+00:00

Can I put all the shared projects into a dll?

and share it to others?
JarvanZhang 23,971 Reputation points

2021-06-08T09:14:23.323+00:00

Do you want to customize a nuget package? It's possible to that. Try to convert the whole solution to the pakcage, it also requires the naive function code.

Check the doc: https://learn.microsoft.com/en-us/nuget/guides/create-packages-for-xamarin

Related link: https://forums.xamarin.com/discussion/comment/418156/#Comment_418156
JarvanZhang 23,971 Reputation points

2021-06-16T01:23:23.947+00:00

Hi, @mc
I have not heard from you for a couple of days. Please let me know if there is anything that I can help here.

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About the custom control renderer?

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