, , , /xib, " " > " " ( "Ctrl" ) XML , view scrollView. , "Open as" > "Interface Builder", .
Note that the restrictions at the top and bottom of the view are used by default in the top and bottom layouts of the manual, but if you want to scroll, you need to use the top or bottom space to represent the container (scroll view). You can do this by clicking the option when creating constraints.
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