'Existing ivar 'delegate' for unsafe_unretained property 'delegate' must be __unsafe_unretained

Question

I\'m getting the error above, but unsure how to go about fixing it. This is my code:

.h:

#import 

@protocol ColorLineDelegate &         


        

Answer 1

Looks like your project might be using ARC then properties should be declared this way:

#import 

@protocol ColorLineDelegate 
-(void)valueWasChangedToHue:(float)hue;
@end

@interface ColorLine : UIButton 
@property (nonatomic, weak) id  delegate;
@end