Le 16 mars 09 à 15:21, Jeremy Pereira a écrit :
On 16 Mar 2009, at 12:10, Jean-Daniel Dupas wrote:
No, you can't, else the compiler will complains if you do not
override all NSObject protocol methods in classes that conform to
the Foo protocol.
No it shouldn't. The compiler should only complain if your class
does not implement those methods, which of course it does as it
inherits from NSObject.
I don't know if it should or not, but it does.
No it doesn't. For instance:
@protocol FooProt <NSObject>
-(void) foo ;
@end
@interface Foo : NSObject <FooProt>
{
}
@end
@implementation Foo
@end
id<FooProt> aFunction ()
{
id<FooProt> obj = [[Foo alloc] init] ;
[obj autorelease] ;
return obj ;
}
The compiler complains about the missing implementation of foo but
not any of the NSObject protocol methods.
/Users/jeremyp/dev/Perform/Protocol.m:26: warning: incomplete
implementation of class 'Foo'
/Users/jeremyp/dev/Perform/Protocol.m:26: warning: method definition
for '-foo' not found
/Users/jeremyp/dev/Perform/Protocol.m:26: warning: class 'Foo' does
not fully implement the 'FooProt' protocol
But change the protocol definition as follows:
@protocol FooProt
-(void) foo ;
@end
And these are the warnings:
/Users/jeremyp/dev/Perform/Protocol.m:26: warning: incomplete
implementation of class 'Foo'
/Users/jeremyp/dev/Perform/Protocol.m:26: warning: method definition
for '-foo' not found
/Users/jeremyp/dev/Perform/Protocol.m:26: warning: class 'Foo' does
not fully implement the 'FooProt' protocol
/Users/jeremyp/dev/Perform/Protocol.m: In function 'aFunction':
/Users/jeremyp/dev/Perform/Protocol.m:31: warning: '-autorelease'
not found in protocol(s)
Wow you're right. I think I missed something when I tried that just
before posting my previous post (I probably forgot to inherit NSObject
in my quick test).
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