ObjC ARC: does a weak property's setter method run when the object is set to nil by ARC?

Question

Really quick question (I could test it myself but not on a computer with Xcode):

If ARC sets a weak property to nil, will the property's setter run with the parameter being nil, or is the property setter bypassed in this case?

Answer 1

No. ARC doesn't set properties to nil. It will set the backing ivar to nil, but that doesn't run your setter.