#import ViewControllerB

ViewControllerA.h

@interface ViewController A : UIViewController<DelegateName>

 ViewControllerA.m

 -(void)jobId:(int)jobId
{
          nsinteger int=jobId;
}

ViewControllerB.h

@protocol DelegateName <NSObject>

-Define Method
for example:
-(void)jobId:(int)jobId;


@end

@interface ViewControllerB

@property(nonatomic, retain)id<DelegateName>delegate;

-Synthasize in ViwControllerB.m file

ViewController B.m

-(void)viewWillDisappear:(BOOL)animated
{
   [self.delegate jobId:intJobId];
}