Hi Peter- For the declared property "protoCell", automatic synthesis is going to make an instance variable named "_protoCell". You can then refer to it in an instance method as either:
1. _protoCell - direct ivar access. 2. self.protoCell - access through the getter. The reference to protoCell alone is neither of the above, and you'll get the warning. I seem to recall that best practice in an init method is to directly access the ivar. HTH! John On Sep 12, 2013, at 3:45 PM, Peter Teeson <[email protected]> wrote: > Xcode 4.6.2 Lion 10.7.5 > Programming with Objective-C seems to indicate I can do this: > #import <Cocoa/Cocoa.h> > #import "Cell.h" //My sub-class > > @interface Document : NSDocument > @property Cell *protoCell; > @end > > and this (i.e. no need to @synthesize): > > @implementation Document > - (id)init > { > self = [super init]; > if (self) { > protoCell = [[Cell alloc]init]; > // Add your subclass-specific initialization here. > } > return self; > } > …… > @end > > but the compiler tells me > Use of undeclared identifier 'protoCell'; did you mean '_protoCell'? > > If I do refer to the ivar using the internal reserved form _protoCell > the compiler is happy. > > What is my lack of understanding? Why am I not allowed to use > the getter protoCell as indicated in the documentation? > > TIA > > Peter > _______________________________________________ > > Cocoa-dev mailing list ([email protected]) > > 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: > https://lists.apple.com/mailman/options/cocoa-dev/john%40positivespinmedia.com > > This email sent to [email protected] _______________________________________________ Cocoa-dev mailing list ([email protected]) 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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [email protected]
