Object-C StudyNote-1

Method:

.. Behavior associated with an object

-(NSString *) name

{

// implementation

}

-(void)setName:(NSString *) name

{

//implementation

}

selector --有点引用的意思

. name for referring to a method

. include colons to indicate arguments

. Doesn't actually include arguments or indicate types

SEL mySelector = @selector(name);

SEL anotherSelector = @selector(setName:);

SEL lastSelector = @selector(doStuff:withThing:andThing:);

Message

. the act of performing a selector on an object

. with arguments, if necessary

NSString * name = [myPerson name];

[myPerson setName:@"New Name"];