Should be pretty straightforward to reverse-engineer this. It's obviously a UIView
subclass, so something like this should suffice, and in modern Objective-C, you don't even need to declare the instance variables in the implementation file.
@interface SFSConfettiScreen : UIView
@property(nonatomic, weak) CAEmitterLayer *confettiEmitter;
@property(nonatomic, assign) CGFloat decayAmount;
@end
This should work if your version of Xcode is 4.4 or newer, as it should be. Otherwise, leave the implementation as-is and remove the @property
declarations, leaving an empty interface declaration. That should also work; I just prefer properties to ivars.