What’s the difference between the atomic and nonatomic attributes?

What do atomic and nonatomic mean in property declarations? @property(nonatomic, retain) UITextField *userName; @property(atomic, retain) UITextField *userName; @property(retain) UITextField *userName; What is the operational difference between these three? 2 27 The last two are identical; “atomic” is the default behavior (note that it is not actually a keyword; it is specified only by the absence … Read more