On Dec 6, 2013, at 7:27 AM, Graham Cox <[email protected]> wrote:
> Is the value of <tileRect> here captured when the block is created,or when it > is run? It depends on whether tileRect is an instance variable. * If it isn’t (i.e. it’s local/static/global), it gets captured when the block is created. * If it _is_ an ivar, then “tileRect” is just syntactic sugar for “self->tileRect”, which means that ‘self’ gets captured at create time, and the ‘->tileRect’ part is evaluated at runtime. (This is one of many reasons why I believe ivar names should be distinguished, e.g. by prefixing them with “_”. Their behavior is different enough from other variables that it’s important to be aware of them when reading code.) —Jens _______________________________________________ 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]
