Question

I have defined a delegate protocol in my custom class this way:

#import <Foundation/Foundation.h>

@protocol myProtocol <NSObject>
-(void)myMethod;
@end

@interface MyClass : NSObject {
    id<myProtocol> delegate;   
}   
@property(nonatomic, assign) id<myProtocol> delegate;
@end

Now in Interface Builder, I drag an NSObject on to the ‘Objects’ area.
Set its class to MyClass.

Why does the connections Inspector not show ‘delegate’ option (like it does for framework classes below)?

Answer 1

You need to specify that it is an IBOutlet like so:

#import <Foundation/Foundation.h>

@protocol myProtocol <NSObject>
-(void)myMethod;
@end

@interface MyClass : NSObject {
    IBOutlet id<myProtocol> delegate;   
}   
@property(nonatomic, assign) IBOutlet id<myProtocol> delegate;
@end

---

From UIKit Constants Reference:

• IBOutlet
  Identifier used to qualify an instance-variable declaration
  so that Interface Builder can synchronize the display and connection
  of outlets with Xcode. Insert this identifier immediately before the
  variable type in any variable declarations.