iOS Associated Domains (Universal Links) with Wildcards not working
I added my findings to this thread: https://forums.developer.apple.com/thread/47315
In short, even in iOS 10, it appears that the wildcard setup requires that the
apple-app-site-association file be served by the wildcard's root.
For instance, if you want to use
*.domain.com, then the
apple-app-site-association needs to be hosted at both, e.g.,
domain.com, else it won't work with simply specifying
applinks:*.domain.com in Xcode.
This is unfortunate if your main site is hosted at
www.domain.com, and that you have a 301 redirect on
domain.com (which redirects you to
www.domain.com), because Universal Links do not allow redirects.
The workaround I found was to create a main subdomain for your app, and to use sub-subdomains for the wildcard. E.g.
app.domain.com(must serve the
server1.app.domain.com(must serve the
That way, in Xcode, you may only specify
applinks:*.app.domain.com and Universal Links will work without you having to specify
server2.app.domain.com, and so on... in Xcode.
Note, however, that you must also explicitly specify
applinks:app.domain.com if you plan on using that server as well with your app.
I hope this helps.
It seems that adding a wildcard in the domain part of the
applinks has only been introduced in
iOS 9.3 Beta 2. In 9.3 Beta 2 release notes:
You can now use Universal Links with arbitrary subdomains instead of needing to list all of the app’s subdomains as fully qualified domain names. Entries have the form:
:[:port number] in which is “webcredentials”, “activitycontinuation”, or “applinks”.
The part of the entry can now optionally be prefixed with “*.” to indicate a wildcard subdomain. For example:
You say that you run on
iOS 9.3.2. But is your
deployment target >=
iOS 9.3 ? If it's not: try by changing it. I think it will solve your issue.
Here you can found a copy of this release notes (sorry, I do not have any other public source)
To match all subdomains of an associated domain, you can specify a wildcard by prefixing . before the beginning of a specific domain (the period is required). Domain matching is based on the longest substring in the applinks entries. For example, if you specify the entries applinks:.mywebsite.com and applinks:*.users.mywebsite.com, matching for the domain emily.users.mywebsite.com is performed against the longer *.users.mywebsite.com entry. Note that an entry for *.mywebsite.com does not match mywebsite.com because of the period after the asterisk. To enable matching for both *.mywebsite.com and mywebsite.com, you need to provide a separate applinks entry for each.