I found that Yahoo weather app has 2 scroll views, one can scroll vertically and the other can scroll horizontally.
These 2 scroll views are overlapped. How can I know which scroll view to scroll, based on the gesture?
For example, if I swipe up, the first scroll view should scroll up and the second one should remain unchanged.
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I have a scrollview embedded in a cell of tableview. The scrollview is a Foxit PDF rendering engine.
I want to scroll vertically the tableview, horizontally the scroll view. I couldn't. As on the first GIF you see scrollview is bouncing even the content height and scroll height is equal. But at least paging is possible.
Then I added a custom scrollview over the Foxit view into the cell. The bouncing disappeared and scrolling up and down the scrollview scrolls the table view. That is good. But now I can not horizontally scroll and change pages of the PDF.
What to do how to "merge" the two approach?
Try to play with panGestureRecognizer of scrollView and tableView. Install a relationship to prevent scrollView getting gestures before tableView scrollView.panGestureRecognizer.require(toFail: tableView.panGestureRecognizer).
To elaborate on my question, I've three scrollviews one top of another, let say base, middle and top. Base scroll view's content size is more so it will scroll, middle scrollview's content size is equal to its frame so it will not scroll, top scrollview's content size is more than its frame so it will also scroll.
Now when I scroll the top scrollview, once it reaches its end, I"m expecting it would scroll the base scroll view as middle is not scrollable. But it seems middle scroll view consumes all my scroll events and not letting the scroll event to go to base scroll view.
I"ve tried by setting more content size to middle scrollview, then it working as expected, first top scroll view scrolls fully then it passes the scroll event to middle scroll view then to the base scroll view.
Now it is more evident that middle scrollview (which is non scrollable) is consuming all of my scrolling event from going to base scroll view. How do I prevent that.
Note : As I've to support zooming, I need scroll view in all three levels.
Any help would be really appreciated.
Thanks.
I've implemented pretty common pattern: you could scroll horizontally between views (paging enabled) and you could scroll any "page" down for more details. It is done with parent UICollectionView containing UIScrollViews, see enclosed image:
Collection View can scroll only horizontally, Scroll View can scroll only vertically.
However I am unable to achieve "proper" horizontal scrolling. I cannot scroll horizontally while inner scroll view is decelerating which heavily decreases UX quality. Tried so far: directionalLockEnabled, delaysContentTouches, canCancelContentTouches, touchesShouldBegin: and gestures with requireGestureRecognizerToFail - all without success (but maybe not all done right).
I thought about the possibilities in UI Design for a new app. What I want to do is:
Have three view where the user can paginate horizontally. In each of this view there is a UIScrollView (fills the whole view) where the user can scroll vertically.
How could I manage, that horizontal scroll events are managed by the Pagination and vertical scrolls are managed by the ScrollView?
I'm sorry, maybe this is kind of a "beginner-Question"...
There might be a possibility to send the different touches to different UI-Elements?
Place the 3 scroll views inside a large scroll view.
The 3 vertical scrolling views should have a content size that matches the screen's width - this will stop them scrolling horizontally and the event will pass up to the the parent scroll view to allow horizontal scrolling.
Ensure that the content size of the parent view matches the screen height so that it only scrolls horizontally.
i have a scrollView that fits the whole screen. In that View i show some UIImages that scroll horizontally. Like in the PageControl Project from Apple.
Then, when the user taps the screen, i fade in a scrollView at the bottom with some other images. Also horizontally scrolling. Like in the ScrollView Project from Apple.
My problem is, that when i come to the end of the scrollView which was faded in, the upper scrollView also starts to drag. How can i stop that during activation of the second scrollView?
Redraw the frame limits on your first scrollView when the second enters the screen. That way, your touches won't respond to both views. This means you need a container-view to keep both views seperated from each other.
Then you just rescale it back whenever your second scrollView disappears.
Edit: or disable scroll in your first scrollview while the second is open.