LoginSegue.m

#import "LoginSegue.h"

@implementation LoginSegue

- (void)perform
{
    UIViewController *sourceViewController = self.sourceViewController;
    UIViewController *destinationViewController = self.destinationViewController;
        
    UIWindow *window = [[[UIApplication sharedApplication] delegate] window];
    
    window.rootViewController = destinationViewController;
    
    [window addSubview:sourceViewController.view];
    
    [UIView animateWithDuration:0.5f delay:0.0f options:UIViewAnimationOptionCurveEaseInOut animations:^{
        CGRect sourceViewFrame = sourceViewController.view.frame;
        sourceViewFrame = CGRectOffset(sourceViewFrame, 0.0f, CGRectGetHeight(sourceViewFrame));
        sourceViewController.view.frame = sourceViewFrame;
    } completion:^(BOOL finished) {
        [sourceViewController.view removeFromSuperview];
    }];
}

@end