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iOS Objective-C Basics (Retired) Advanced Objective-C Dynamic Typing

Posted by Brandon Johnson
Brandon Johnson
14,189 Points

I'm not really sure what this is asking

I don't understand what the question is asking me to do

Ricardo Hill-Henry
Ricardo Hill-Henry
38,442 Points

Which task are you having trouble with (eg. 1/3, 2.3, 3/3)?

Brandon Johnson
Brandon Johnson
14,189 Points

It was the second task 2/3. Not really sure if it wanted me to assign a new NSNumber variable to the id or to assign the already declared id variable as a NSNumber var.

1 Answer

Ricardo Hill-Henry
Ricardo Hill-Henry
38,442 Points

Ok, so first you have to realize that declaring a variable to type id allows you to later assign that variable to any to just about any type of Objective-C object. Now, sure we could use the long syntax to make the variable thing of type NSNumber, but it will be much easier to use the shorthand convenience constructor. 

id thing = nil;
thing = @4;