NSObject+Cast

NSObject+Cast.h

@interface NSObject (Cast)

+ (instancetype)cast:(id)object;

@end

NSObject+Cast.m

#import "NSObject+Cast.h"

@implementation NSObject (Cast)

+ (instancetype)cast:(id)object {
    return [object isKindOfClass:self] ? object : nil;
}

@end

UsageExample.m

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    if ([segueId isEqualToString:@"seagueAppointmentListToMap"]) {
        HLJAppointment *appointment = [HLJAppointment cast:sender];
        HLJAppointmentMapController *controller = [HLJAppointmentMapController cast:destinationController];
      
        // property injection
        controller.model = appointment;
   }
}