How is method declaration different in Objective-C?

Question

Objective-C

For example:

@interface Fraction : NSObject
@property double numerator, denominator;

-(void) setTo: (double) r over: (double) i;
-(void) reduce;
+(Fraction *) allocF;
+(int) count;

@end

So what is the difference between + at the beginning and -?

Answer 1

Just a few hours ago there was a discussion here:
Class Method and Object Method in Objective-C
Briefly, + declares a class method, - an object method.