custom deleget not responding ToSelector

Question

Following is my code, there is no error but selector is not responding.

Code in ExampleTableviewSubProductDetail.h

@protocol EnterAmountDelegate <NSObject>

 -(void)titlechange:(NSInteger)amount;

@end

@class ASIFormDataRequest;
@interface ExampleTableviewSubProductDetail :  UIViewController<UIScrollViewDelegate>
{
}
@property (nonatomic, strong) id <EnterAmountDelegate>delegate;

Code in ExampleTableviewSubProductDetail.m

  @implementation ExampleTableviewSubProductDetail
  @synthesize delegate;
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];

if([delegate respondsToSelector:@selector(titlechange:)])
{
    //send the delegate function with the amount entered by the user
    [delegate titlechange:20];
}

code in HostProductdetailViewController.h

 #import "ViewPagerController.h"
 #import "ExampleTableviewSubProductDetail.h"

 @interface HostProductdetailViewController :  ViewPagerController <ViewPagerDataSource, ViewPagerDelegate, EnterAmountDelegate>
{
}

code in HostProductdetailViewController.m

  - (void)viewDidLoad {
[super viewDidLoad];
self.dataSource = self;
self.delegate = self;

 }
 -(void)titlechange:(NSInteger)amount
  {
   NSLog(@"sdfsf");
  }

In the viewwillapper following Line always return false

 if([delegate respondsToSelector:@selector(titlechange:)])

Please let me know if i am missing anything.

Thanks

Answer 1

When pushing from HostProductdetailViewController to ExampleTableviewSubProductDetail you need to set the exampleTableviewSubProductDetail.delegate = self