So that mapping links open the maps app like they used to, I want to present a different link depending on whether a user is on iOS 6 or other (iOS 4, 5, Android, whatever).
Something like: -- if on iOS 6.0 or higher, show http://maps.apple.com?q="address", if other, show http://maps.google.com?q="address".
NOTE: I realize you can also call the maps app directly as opposed to via a web link (don't have it handy right now), but that would not fix the issue, since someone on Android or lesser iOS would get no use from that.
You can detect iOS version using the navigator.userAgent
string. Something like:
if(/(iPhone|iPad|iPod)\sOS\s6/.test(navigator.userAgent)) {
// use apple maps
}
Note that this is in no way future proof, user agent strings can change, and so will the OS. Also AFAIK, google maps via the browser is available on all platforms, including iOS 6.