Cloner ou copier UIViewController ou UIView

UII besoin de copier, auto contrôleur de soi.vue, j'ai essayé:

UIView* viewOfSelf =[self.view copy];
UIViewController* controller = [self copy];

UIView* viewOfSelf =[self.view mutableCopy];
UIViewController* controller = [self mutableCopy];

L'erreur est:

    -[UIViewController mutableCopyWithZone:]: unrecognized selector sent to instance 0xb803490
    -[UIView copyWithZone:]: unrecognized selector sent to instance 0x6e0acb0

source d'informationauteur Davidin073