Why wont this work?

[Arcadiu]

Ok dont laugh, I am practicing things I've learned from an Objective C book, and I have already struck an error declaring a class and trying to make a method which outputs to console saying Hello.

What happens is, it compiles but I get one error saying NSObject may not respond to -print

This is the code:

#import <Foundation/Foundation.h>

@interface Thing : NSObject
- (void) print;
@end

@implementation Thing : NSObject

- (void) print
{
	NSLog(@"Hello");
}

@end

int main() {
	
	NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
	NSObject *Thing;
	Thing = [[NSObject alloc] init];
		
	
		
	
	
	[Thing print]; //NSObject may not respond to -print warning
	
	[Thing release];
	
	[pool drain];
	
	
	return 0;
}

Thanks in advance

Arc

[Jeepston]

replace

NSObject *Thing;

with

Thing *thing;

[Arcadiu]

Is that because I am making an instance variable of the object Thing?

Can you explain why and whats wrong with NSObject *Thing;?

[Jeepston]

because you are declaring an object of class NSObject, which doesn't have method "print".

To introduce "print", you create new class Thing which inherits class NSObject and create this method. So now all objects of class Thing (and derivative classes) will have method "print".

[Arcadiu]

This still wont work.

Could someone write me a program like that that outputs hello in nslog and to run that method you need to call it from main?

also could it include interface and implementation with a object name of your choice

sorry if this seems off topic but i am really stumped and is really getting my head down low that i cant output hello to terminal ...

[Jeepston]

wait a minute... what terminal do you mean? debug console in xcode or console of the jailbroken iphone?

[Arcadiu]

the Terminal console on the macbook :S if that makes any sense

its not on a iphone i dont have an ipod touch/iphone

[Jeepston]

darn, I confused this forum with iphone development %)