gistfile1.txt

@protocol BaseDelegate <NSObject>

@required
- (void)didSelectActionSheetIndex:(NSString *)actionTitle actionSheetIndex:(NSInteger )index;

@end

@interface CustomAction : NSObject <UIActionSheetDelegate>

@property (nonatomic, assign) id<BaseDelegate> delegate; // Assign property

@end

--------------

@interface FirstViewController () <BaseDelegate, ActionDelegate>

@property (nonatomic, assign) NSInteger currentSelection;

@property (nonatomic, strong) CustomAction *actionObj;

@end

@implementation FirstViewController 

@synthesize currentSelection, actionObj;

...
...

- (void)cellMenuClicked:(id)sender {
//    CustomAction *obj = [[CustomAction alloc] init];
    NSLog(@"Proto - %@", actionObj);
    actionObj.delegate = self;
    
    thumbActionSheet = [[UIActionSheet alloc] initWithTitle:nil delegate:actionObj cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Add to Watchlist", @"Share", nil];
    [thumbActionSheet showInView:[self.view window]];
}