Swift project crashing with Thread 1: EXC_BAD_ACCESS (code = 1, address = 0x0)

I ran into the same issue today. As of Xcode 6 beta 6 the auto complete suggests:

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject : AnyObject]) -> Bool {}

This crashes at startup with an EXC_BAD_ACCESS and a blank screen.

As soon as an ! is added to the last argument, everything works fine:

func application(application: UIApplication,didFinishLaunchingWithOptions launchOptions: [NSObject : AnyObject]!) -> Bool {}

In current documentation the ! is missing as well:

optional func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject : AnyObject]) -> Bool

Works with Xcode 6.1:

Try

PFAnalytics.trackAppOpenedWithLaunchOptionsInBackground(launchOptions, block: nil)

instead of

PFAnalytics.trackAppOpenedWithLaunchOptions()

Solution from OP.

Problem solved by fixing the code as below.

In all method signatures, replace:

application: UIApplication

with:

application: UIApplication!

And in application:didFinishLaunchingWithOptions:, replace:

launchOptions: [NSObject : AnyObject]

with:

launchOptions: NSDictionary!