get type of NSNumber

Question

I want to get the type of NSNumber instance.

I found out on http://www.cocoadev.com/index.pl?NSNumber this:

 NSNumber *myNum = [[NSNumber alloc] initWithB         


        

Answer 1

Swift Version

NSNumber is a class-cluster so each underlying type can be figured from the instance. This code avoids hard-coding the different NSNumber types by creating an instance of the expected type, and then comparing it against the unknown type.

extension NSNumber {
    var isBool: Bool {
        return type(of: self) == type(of: NSNumber(booleanLiteral: true))
    }
}