The "official" syntax for invoking a class method in Objective-C?

Question

In Ruby, referring to the "downcase" method of the "String" class, I write the string String #. When it comes to the method of the “new” class, I write String.new.

Is there something similar for Objective-C?

Answer 1

Given a class declaration like this

@interface MyClass (NSObject)
{}

+ (id)classMethod;
- (id)instanceMethod;
@end

Common practice is classMethodas +[MyClass classMethod]or more compact +classMethodif the class is clear. Similarly, I would call instanceMethodas -[MyClass instanceMethod]or -instanceMethod.

Answer 2

gdb uses +[MyClass foo]and -[MyClass bar];

Answer 3

, :

+ (void)someClassMethod;

MyObject, :

[MyObject someClassMethod];