Question

I have project is single view app and add to view controller scrollview
with parameters

[scroller setScrollEnabled:YES];
[scroller setContentSize:CGSizeMake(0, 960)];

if screen resolution is 320×480 then we have some invisible "screen 2" (320×480)
how do I make that – did load app at position "screen 2" and after that
I can scroll not down, but to up at start launch app.

How to release that?

Answer 1

you have to give the scrollview a proper content size, depending on the screen size.

Assuming that the scrollview is fullscreen in portrait:

//------------------------------------------
- (void)viewDidLoad{
  [super viewDidLoad];

  CGRect screenSize = [[UIScreen mainScreen] bounds];

  [scroller setScrollEnabled:YES];
  [scroller setContentSize:CGSizeMake(0, screenSize.size.height)];

}

//------------------------------------------

- (void)viewDidAppear:(BOOL)animated{
  [super viewDidAppear:animated];

  CGRect screenSize = [[UIScreen mainScreen] bounds];

  CGPoint scrollPoint = CGPointMake( 0.0, screenSize.size.height / 2);

  [scroller setContentOffset:scrollPoint animated:YES];

}