UIScrollView Not Scrolling?

Question

I have a UIScrollView created in interface builder with a bunch of UITextView and UIImageView objects already added. I have it connect

Answer 1

I use a custom view on the UIScrollView, for pull to refresh function, and the scroll view is not scrollable. I try set contentSize with AutoLayout, and try set it by codes too. The scroll view still cannot scroll.

After spending 3 ~ 4 hours, I solve it by contentInset. It will tell scroll view to add some extra space for scrolling.

override func viewDidLayoutSubviews() {
    // Add extra 15pt on the `top` of scrollView.
    //self.scrollView.contentInset = UIEdgeInsetsMake(15, 0, 0, 0)

    // Add extra 2pt on the `bottom` of scrollView, let it be scrollable. And the UI is more beautiful in my case. 
    self.scrollView.contentInset = UIEdgeInsetsMake(0, 0, 2, 0)
}

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Reference docs:

• Understanding the contentOffset and contentInset properties of the UIScrollView class @blog
• What's the UIScrollView contentInset property for? @Stackoverflow