On iOS versions before iOS 11:
I connect to a wifi network, the captive portal splash page is presented, a presented button links to an app on the app store https://itunes.apple.com/etcetc, the button is pressed and the app store is opened iOS.
On iOS 11:
The app store is not opened into the foreground. The user has to press the home button to get the app store.
How do I open the app store in the foreground when pressing the app store link?
This problem only happens in iOS 11.
Thanks
We met the same problem, what we can do is filing a bug report to apple.
Please refer to the discussion here: https://forums.developer.apple.com/thread/75498#221482