UIScrollView adjusts contentOffset when contentSize changes

Occurs when pushing a UIViewController containing a UIScrollView using a UINavigationController.

iOS 11+

Solution 1 (Swift Code):

scrollView.contentInsetAdjustmentBehavior = .never

Solution 2 (Storyboard)

iOS 7

Solution 1 (Code)

Set @property(nonatomic, assign) BOOL automaticallyAdjustsScrollViewInsets to NO.

Solution 2 (Storyboard)

Uncheck the Adjust Scroll View Insets

iOS 6

Solution (Code)

Set the UIScrollView‘s property contentOffset and contentInset in viewWillLayoutSubviews. Sample code:

- (void)viewWillLayoutSubviews{
  [super viewWillLayoutSubviews];
  self.scrollView.contentOffset = CGPointZero;
  self.scrollView.contentInset = UIEdgeInsetsZero;
}