On 14 Mar 2009, at 04:27, Roland King wrote:
As NSObject is also a protocol you could probably also do
id <NSObject, Protocol> to say the object supports NSObject and
Protocol methods but I never do, partly because it doesn't seem as
clear, partly because I know that I'm always going to pass something
which is actually descended from NSObject, not just supporting that
protocol and partly because the NSObject protocol doesn't have some
of the NSObject methods I often end up using.
Or you can define your protocol as extending the NSObject protocol. e.g.
@protocol Foo <NSObject>
// Methods
@end
On Mar 14, 2009, at 12:13 PM, Richard Somers wrote:
The Objective-C 2.0 Programming Language documentation indicates
that a type declaration for an object including a formal protocol
should look something like this.
id <Protocol> anObject;
I have been studying some sample code that does it like this.
NSObject <Protocol> *anObject;
What is the difference between the two?
Richard
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