UIButton @property (nonatomic, retain) mechanism understanding

[iRanjan]

Hi Guys,

Can you please tell me does a UIButton instance require the following:

@property (nonatomic, retain) UIButton *btnClick;


Regards
Ranjan

[royen]

By far the best explanation of properties that I have come across is Slick's Definitive Guide To Properties.

The short answer is that it depends on wether btnClick is an instance variable or a local variable. Instance variables are defined in the @interface in the .h-file and I can't think of a case where you wouldn't need a @property declaration. Local variable are defined in the @implementation in the .m-file and can't have property declarations.

So the even shorter answer is probably "Yes."

[iRanjan]

Thanks.

Originally Posted by royen

By far the best explanation of properties that I have come across is Slick's Definitive Guide To Properties.

The short answer is that it depends on wether btnClick is an instance variable or a local variable. Instance variables are defined in the @interface in the .h-file and I can't think of a case where you wouldn't need a @property declaration. Local variable are defined in the @implementation in the .m-file and can't have property declarations.

So the even shorter answer is probably "Yes."

[Den Policarpio]

[deleted]