添加自定义Dismiss类；

//  Dismiss.h

//  StoryBoardTest

//

//  Created by zhujin on 14/12/23.

//  Copyright (c) 2014年 zhujin. All rights reserved.

//

#import <UIKit/UIKit.h>

@interface Dismiss : UIStoryboardSegue

@end

 // .m中

#import "Dismiss.h"

@implementation Dismiss

- (void)perform

{

   UIViewController *sourceViewController = self.sourceViewController;

    [sourceViewController.presentingViewController dismissViewControllerAnimated:YES completion:^{

    }];

}

@end

iOS8 StoryBoard 连线diss方法