UIScrollView Not scrolling to the bottom - ios

Question

I have a scrollview set up that holds 20 sunglasses, when calling the function, it brings up a new view with the sunglasses 2 by 2 with 20 in total (with 19 and 20 being at the bottom of the scrollview).
It works perfectly on iPhone & iPhone5 but on the iPad, it only goes to 16, if I try and drag further, I can see the remaining 4 sunglasses, but I cannot select them, as the scrollview just bounces back to the 'bottom' which it thinks is 16.
This is on an iPad Air, so I am not sure if it an iPad 2 would have this issue with the different resolution.
This is how I am calling the view;
- (IBAction)glassesClick:(id)sender
{
[(AppDelegate*)[[UIApplication sharedApplication] delegate] playSoundEffect:1];
[scroll scrollRectToVisible:CGRectMake(0, 0, 5, 5) animated:NO];
glassesView.frame = CGRectMake(0, -[[UIScreen mainScreen] bounds].size.height, [[UIScreen mainScreen] bounds].size.width, [[UIScreen mainScreen] bounds].size.height);
[self.view addSubview:glassesView];
[UIView animateWithDuration:0.5 delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^
{
glassesView.frame = CGRectMake(0, 0, [[UIScreen mainScreen] bounds].size.width, [[UIScreen mainScreen] bounds].size.height);
} completion:nil];
}
Scroll container view setting;
{
for(UIView *view in [scroll subviews])
[view removeFromSuperview];
scroll.contentSize = CGSizeMake(scroll.frame.size.width, 1760);
for(int i = 0; i < 20; i++)
{
int xCoord = 0;
if(i % 2 == 0)
xCoord = 57;
else
xCoord = 188;
UIButton *glasss = [[UIButton alloc] initWithFrame:CGRectMake(xCoord, 20 + i/2 * 150 + i/2 * 20, 75, 150)];
if(UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
{
int xCoord = 0;
if(i % 2 == 0)
xCoord = 156;
else
xCoord = 462;
glasss.frame = CGRectMake(xCoord, 20 + i/2 * 300 + i/2 * 20, 150, 300);
scroll.contentSize = CGSizeMake(scroll.frame.size.width, 2580);
}
glasss.tag = i + 1;
[glasss addTarget:self action:#selector(glassChosen:) forControlEvents:UIControlEventTouchUpInside];
[glasss setImage:[UIImage imageNamed:[NSString stringWithFormat:#"glass%d.png", i + 1]] forState:UIControlStateNormal];
[[glasss imageView] setContentMode:UIViewContentModeScaleAspectFit];
if(i >= 10)
{
if([[[NSUserDefaults standardUserDefaults] objectForKey:#"purchased_glasses"] isEqualToString:#"NO"])
{
UIImageView *locked = [[UIImageView alloc] initWithFrame:CGRectMake(10, 10, 20, 25)];
locked.image = [UIImage imageNamed:#"lock_button.png"];
[glasss addSubview:locked];
[locked release];
[glasss removeTarget:self action:#selector(glassChosen:) forControlEvents:UIControlEventTouchUpInside];
[glasss addTarget:self action:#selector(chooseLockedFlavor) forControlEvents:UIControlEventTouchUpInside];
}
}
UIImageView *backGlass = [[UIImageView alloc] initWithFrame:glasss.frame];
backGlass.image = [UIImage imageNamed:#"back_glass.png"];
[backGlass setContentMode:UIViewContentModeScaleAspectFit];
[scroll addSubview:backGlass];
[backGlass release];
[scroll addSubview:glasss];
[glasss release];
}
}

Answer 1

In this segment:
scroll.contentSize = CGSizeMake(scroll.frame.size.width, 1760);
We discovered you're explicitly setting the height of the contentSize. As such, you're probably blocking your iPad view. Try setting it dynamically (or not setting it at all!).

Answer 2

Set scrollView contentSize in viewDidLayoutSubviews instead of viewDidLoad.
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
scroll.contentSize = CGSize(scroll.frame.size.width, 1760)
}