Set Scrollview in Swift 

override func viewWillLayoutSubviews()
{
    super.viewWillLayoutSubviews();
    self.scrollView.contentSize.height = 3000; // Or whatever you want it to be.
}
 
override func viewWillLayoutSubviews()
{
    super.viewWillLayoutSubviews();

    self.scrollView.frame = self.view.bounds; // Instead of using auto layout
    self.scrollView.contentSize.height = 3000; // Or whatever you want it to be.
}

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