Prevent subview from scrolling in a UIScrollView

问题:

I have a UIScrollView subclass with a certain subview I'd like to prevent from scrolling (while all the other subviews scroll as normal).

The closest example to this I can think of is UITableView's "index strip" on the right side (look in the Contacts app to see an example). I am guessing this is a subview of the table (scrollview) but it does not move as the user scrolls.

I can't seem to make my subview stay put! How can I accomplish this?

回答1:

The trick is to adjust the frame of the "non-scrollable" subview inside -layoutSubviews.

回答2:

Add the view that you want not to move as a sibling view of the scroll view on top of the scroll view instead of as a subview.

回答3:

You can set it's property called userInteractionEnabled to NO