Xamarin.iOS custom URL scheme deep links work but Universal Link doesn't work

Question

Xamarin.iOS custom URL scheme deep links work but Universal Link doesn't work

Yongqing Huang 241

Hi,
My Universal Link doesn't work.
I tested my https://www,axin.be using https://search.developer.apple.com/appsearch-validation-tool:

Error no apps with domain entitlements
The entitlement data used to verify deep link dual authentication is from the current released version of your app. This data may take 48 hours to update.

This message is not clear for me.
Domain entitlements are specified in Entitlements.plist

How can I tell the web page about my domain entitlements? Need I firstly publish the current released version to App Store?

Thanks in advance.

Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2022-04-07T09:41:47.627+00:00
If you are using development profile and have deployed the app into your device, you don't need to publish it to App Store, it allows debugging of Universal Link. I tested this function on my iPhone, and it can jump to the app after clicking my https link.
You could try to add different paths to test.

"paths": [ // add some other paths, refer to https://developer.apple.com/library/archive/documentation/General/Conceptual/AppSearch/UniversalLinks.html#//apple_ref/doc/uid/TP40016308-CH12-SW1 ]

Uninstall the APP and deploy again, when the user installs the app first, Apple will request your apple-app-site-association file, you could also try to do some testing by grasping the request of your APP.
You could also try to create an empty project via XCode, the Bundle Identifier and the development provisioning profile should be same as them in Xamarin project. Then enable Associated Domains and input applinks: domain name, run the app on your device to test.
If you can't catch this request, or Universal Link still doesn't work via Xcode, I have to say you may need the further support by Apple.
If you have any other issues, feel free to let me know.
Yongqing Huang 241 Reputation points

2022-04-07T21:25:45.247+00:00

Hi Wenyan,

I have tried to create an empty project via XCode as you suggested.It works: it can jump to the app after clicking my https link. Thank you!

But it only works on url: https://mydomain/*

I want it to jump to the app after clicking ANY https link: https://**
apple-app-site-association file content:
{
"applinks": {
"apps": [],
"details": [{
"appID": "MyTeamID.benes.axinmobile",
"paths": [ "*" ]
}
]
}
}

I'm concern about how to make it working. I use my app as an browser. It should response on any url.

The Xamarion.iOS Universal link doesn't work yet.

Accepted answer

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Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2022-04-07T09:41:47.627+00:00

If you are using development profile and have deployed the app into your device, you don't need to publish it to App Store, it allows debugging of Universal Link. I tested this function on my iPhone, and it can jump to the app after clicking my https link.
You could try to add different paths to test.

"paths": [ // add some other paths, refer to https://developer.apple.com/library/archive/documentation/General/Conceptual/AppSearch/UniversalLinks.html#//apple_ref/doc/uid/TP40016308-CH12-SW1 ]

Uninstall the APP and deploy again, when the user installs the app first, Apple will request your apple-app-site-association file, you could also try to do some testing by grasping the request of your APP.
You could also try to create an empty project via XCode, the Bundle Identifier and the development provisioning profile should be same as them in Xamarin project. Then enable Associated Domains and input applinks: domain name, run the app on your device to test.
If you can't catch this request, or Universal Link still doesn't work via Xcode, I have to say you may need the further support by Apple.
If you have any other issues, feel free to let me know.
Yongqing Huang 241 Reputation points

2022-04-07T21:25:45.247+00:00

Hi Wenyan,

I have tried to create an empty project via XCode as you suggested.It works: it can jump to the app after clicking my https link. Thank you!

But it only works on url: https://mydomain/*

I want it to jump to the app after clicking ANY https link: https://**
apple-app-site-association file content:
{
"applinks": {
"apps": [],
"details": [{
"appID": "MyTeamID.benes.axinmobile",
"paths": [ "*" ]
}
]
}
}

I'm concern about how to make it working. I use my app as an browser. It should response on any url.

The Xamarion.iOS Universal link doesn't work yet.

Answer 1

This is really an Apple question not a Xamarin question. All links here are to Apple's documentation

Neither this

I want it to jump to the app after clicking ANY https link: https://**

nor this

I use my app as an browser. It should response on any url.

can be implemented by Universal Links and Associated Domains.

From your description, you have Universal Links and Associated Domains working, but your ultimate goal of taking over all https traffic is not something that Apple supports with Universal Links.

To take over all https traffic you'd have to register your app as a browser, which has some significant requirements. See Preparing Your App to be the Default Browser or Email Client

Universal links can use Associated Domains to allow specific domains to redirect to your app, but they aren't suitable for creating a general-purpose browser. Apple doesn't allow a registered browser to receive Universal Links.

Allowing Apps and Websites to Link to your Content
Supporting Universal Links in Your App
Supporting Associated Domains

Yongqing Huang 241 Reputation points

2022-04-08T07:33:23.78+00:00

thanks!

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Xamarin.iOS custom URL scheme deep links work but Universal Link doesn't work

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