Adding Vertical space using Autolayout programmatically - ios

Question

I am trying to add a Custom View to an existing UIScrollView programmatically. I surfed the net and found possible solutions but the solution mess up the existing Autolayout. I need to add a vertical space between the super view of the custom view(i.e.- scroll view) and the custom view. So that whenever a user switches from a larger screen(iPhone5) to smaller(say iPhone4s) or vice versa the custom view is adjusted accordingly on the screen.
-(void) createEventsOnScroll
{
[imageScroller setContentSize:CGSizeMake(self.imageArray.count*imageScroller.frame.size.width, imageScroller.frame.size.height)];
[imageScroller setContentOffset:CGPointMake(imageScroller.frame.size.width*self.selectedEventIndex,0)];
imageScroller.showsHorizontalScrollIndicator = NO;
for (int i = 0; i<self.imageArray.count; i++)
{
EventCustomView *event = [[EventCustomView alloc]initWithFrame:CGRectMake(i*320+5, 3, 310, 435)];
ChildImage *child = [self.imageArray objectAtIndex:i];
NSData *data = [NSData dataWithContentsOfFile:child.imageURL];
event.eventImage.image = [UIImage imageWithData:data];
[event.eventImage setContentMode:UIViewContentModeScaleAspectFit];
event.noteView.delegate = self;
[imageScroller addSubview:event];
event.translatesAutoresizingMaskIntoConstraints = NO;
imageScroller.translatesAutoresizingMaskIntoConstraints = NO;
NSMutableArray *constraints = [[NSMutableArray alloc]init];
[constraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:#"|[event]|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(event)]];
[constraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:#"V:|[event]-5-|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(event)]];
}
imageScroller.bounces = NO;
imageScroller.delegate = self;
[imageScroller setClipsToBounds:NO];
imageScroller.scrollEnabled = YES;
imageScroller.pagingEnabled = YES;
}
Thanks in Advance.