Crash at Launch

[DaveBatton]

I have some code that may attempt to display SSSnackbar at launch from -applicationDidFinishLaunching:. I'm OK with it not being able to display a message here, but instead it crashes. The problem is that in -show it assumes there's a rootViewController:

    UIViewController *topController = [UIApplication sharedApplication].keyWindow.rootViewController;

If this is nil, bad things happen. I think it just needs a check for nil here. It could return without displaying anything.