The corrections are:
- Change the UIFont's API from '?' to '!'. These APIs are almost never get checked.
- Change the "options" array parameter to being optional.
Swift SVN r20723
This is what we use to drop the variadic parameter on UIActionSheet and
UIAlertView's initializers, along with secretly adding a category to each
to provide the one-fewer-parameter init method implementation. However,
we haven't been using the Swift name for the method to generate Objective-C
calls for a while now--we use the @objc attribute. And that was still using
the original selector, and so we crashed.
Fixed by passing the new selector to the @objc attribute.
<rdar://problem/17012323>
Swift SVN r18582
Introduce the UIApplicationMain attribute, and check that it's only applied to nongeneric classes that conform to UIApplicationDelegate.
Swift SVN r18048
