xcode: property 'title' 'copy' attribute does not match super class 'UIViewController' property

Question

Hi I'm currently getting this error message. and by the love of banana, I cannot figure out what I am not doing right.

Its just an

IBOutlet UILabel *title;

and

@property(nonatomic, retain) IBOutlet UILabel *title;

I've made which is connected to my xib file connected to a UILabel because I dynamically change the title during run time.

Classes/../taskViewController.h:44: warning: property 'title' 'copy' attribute does not match super class 'UIViewController' property

I dont understand what it means. Normally i am able to get rid of warning messages. But this one... I dont have a clue whats going on.

Can someone please guide me and explain what is happening here.

Answer 1

Your problem is that UIViewController already defines a title property and you are using a different memory manangement option than it does. To fix this, change the name of your property. ex: @property (nonatomic, copy) UILabel *titleLabel;. If you want the instance variable to have the same name, and you use @synthesize, use @synthesize titleLabel=title;.

As an aside, why are you copying a UILabel? Normally you would use retain so that it is the same object.

Answer 2

It means:

• you have a subclass of UIViewController
• it contains a property named "title"
• you have declared the property with the "copy" attribute
• the parent class (UIViewController) already has "title" property with a conflicting definition (i.e., not "copy")