Pushing on the Pull Door
The URL scheme alert view reverses the standard position of the accept and cancel buttons. Make sure your support staff anticipate this confusion when trouble-shooting “I can’t log in via Facebook” bug reports.
Previously: iOS 9 to Block Abuses of -canOpenURL:.
Update (2015-09-08): Jonathan Grynspan:
“iOS 9 only shows URL scheme alert views for host apps linked against iOS 8 or earlier.” This isn’t accurate.
The prompt is not connected to iOS 9’s Info.plist changes, so if that’s what you or Jared is seeing, please file a radar.