As far as what I remember, as the Stanford iOS development courses' teaching (where I picked up Objective-C), you should almost always access ivars using accessor methods, especially if they are declared as @property's and got @synthesize'd.
在 2012-10-25，上午4:49，Quentin Mathé <[email protected]> 写道： > Le 9 sept. 2012 à 06:41, Banlu Kemiyatorn a écrit : > >> Hi, I have one quick question about Traits. >> AFAIK Traits methods need to access ivars via accessors. But I wonder if the >> Traits class have the similar or partially similar layout, like one or two >> matching ivars after isa, would that be possible for traits methods to >> access the correct ivar in the applied class? Sorry I should just test this >> out but I have no access to a proper machine ATM. > > I asked the question a while ago to David, but I cannot remember his exact > answer. > > I would say that should work if the Trait class and its superclasses, and the > targeted class and its superclasses, all use the same exact ivar layout. The > important point would be to check every superclass in both class hierarchies > (trait and target) to ensure they result in the same ivar layout for an > instance. > > Cheers, > Quentin. > _______________________________________________ > Etoile-discuss mailing list > [email protected] > https://mail.gna.org/listinfo/etoile-discuss _______________________________________________ Etoile-discuss mailing list [email protected] https://mail.gna.org/listinfo/etoile-discuss
