In your main method, you are calling NSLog(self.str) - While this will work if the object you pass in is a string, it won't work if you continue to try and log other objects. NSLog takes a format string as a parameter. If you just do NSLog(self) like you are in some of your commented code, and self is not a string, it'll crash because it expected a string. You should do NSLog(@"self: %@", self) the %@ will print out the string returned by an objects description method.
Other than that, your init method looks fine, how exactly are you creating an instance of this object? Could you show the code for that? The problem may lie there.
Jasarien
2010-02-18 10:35:37