@property definitions with ARC: Is strong default

问题:

Just running the ARC refactoring tool on the new xcode 4.3.1 and noticed that my (nonatomic, retain) properties are being swapped out for just (nonatomic) instead of (nonatomic, strong) like in the previous xcode.

My code seems to run fine after this change so I am assuming that it is defaulting to strong anyway, anyone know why things have changed with the ARC converter?

回答1:

Yes, strong is the default in Xcode 4.3 and later. It's documented both in the LLVM docs and in Apple's guides to using properties and working with ARC.

回答2:

When the property is a basic type, the default value is assign, when the property is a object type, the default value is strong