scrollview not work when add to uiview

[adinh3290]

Hello, i have a problem with scrollview:
when i use a UIview (uiview), add subview(scrollview) to it. then in my viewControler, i continue add subview (uiview) to viewController.
But problem is the scrollview did not work.

Can you explain it to me?
Thanks in advance.

UIView *uv=[[UIView alloc] init];
[uv addSubview:scroll];
[self.view addSubview:uv];

[Narender Mudgal]

you have to add some uiview as subview to scrollview, and then you have to set the contentSize of scroll view. that content size will be your subview size. then only scrollview will work, otherwise it will not scroll as its contentsize is 0