iOS 9: -canOpenURL: failed for URL

If you're receiving the following error in Xcode:

-canOpenURL: failed for URL: "<scheme>://" - error: "This app is not allowed to query for scheme <scheme>"

Apple changed the canOpenURL method on iOS 9. Apps which are checking for URL Schemes have to declare these Schemes as it is submitted to Apple. More info here.

Simply open your app's .plist (usually platforms/ios/<appname>/<appname>-Info.plist ) with an editor and add the following code with your needed Schemes.