Both of the methods return nil and as per the document it says "Class is not loaded". Is there a compile time option to load the classes or only way to do it as at runtime..
thanks mohan On Wed, Jan 14, 2009 at 6:46 AM, Adam Venturella <aventure...@gmail.com>wrote: > The output is the same, but there is also: > #import <objc/runtime.h> > objc_getClass([myString UTF8String]); > > I am going to guess that NSClassFromString(myString) is probably using > objc_getClass(), maybe not. I didn't know NSClassFromString existed > though, so I am switching to that instead of using the runtime.h > function. > > > > > On Tue, Jan 13, 2009 at 8:45 PM, Mohan Parthasarathy <surut...@gmail.com> > wrote: > > On Tue, Jan 13, 2009 at 8:06 PM, Ken Thomases <k...@codeweavers.com> > wrote: > > > >> On Jan 13, 2009, at 3:33 PM, Jean-Daniel Dupas wrote: > >> > >> he is just talking about class name, not class. > >>> > >>> NSClassFromString() is probably what you're looking for. > >>> > >>> NSMutableString *clsName = derive class name from the entry. > >>> > >>> Class cls = NSClassFromString(clsName); > >>> > >>> id<YouProtocol> instance = [[cls alloc] init]; > >>> > >> > >> I'll just add the following: > >> > >> If you don't need such complete flexibility -- for example, if you're > >> selecting from a fixed set of classes by some tag -- then you don't need > to > >> compute a class name and look up the class that way. > >> > >> Classes are objects and so they can be stored in collections. For > example, > >> you could have a lookup dictionary that mapped from keys to class > objects. > >> You would construct the dictionary like this: > >> > >> [NSDictionary dictionaryWithObjectsAndKeys: > >> [SomeClass class], "key1", > >> [OtherClass class], "key2", > >> [ThirdClass class], "key3", > >> // ... etc. > >> nil]; > >> > >> This adds a small amount of safety in the same way that > >> statically-specified stuff generally does. For example, the compiler > will > >> catch typos in class names. > >> > > > > Thanks for this suggestion. This looks fairly clean except that the space > is > > allocated at the beginning. This may not be a big deal in some cases. In > the > > other way, you allocate space and insert in the dictionary only when > needed. > > Also, eventually i need the real object instances inserted in the > > dictionary. > > > > -mohan > > > > > > -mohan > > > > > >> > >> Cheers, > >> Ken > >> > >> > > _______________________________________________ > > > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > > > Please do not post admin requests or moderator comments to the list. > > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > > > Help/Unsubscribe/Update your Subscription: > > http://lists.apple.com/mailman/options/cocoa-dev/aventurella%40gmail.com > > > > This email sent to aventure...@gmail.com > > > _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
