Hi, I have tried this to make sure that the class is loaded, but not working:
[[NSBundle mainBundle] classNamed:clsName]; [self loadBundleForClass:clsName]; Class cls = NSClassFromString(clsName); I still get nil.. What am i missing ? thanks mohan On Thu, Jan 15, 2009 at 9:17 AM, Mohan Parthasarathy <surut...@gmail.com>wrote: > 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
