I have a tableview and I would like to know when user scroll at top and if in those moment the tableview is not at top (for example its at middle) I just implement the delegate method scrollViewDidScroll and check the value of content offset and its ok.
My problem is when the tableview is is already at the top and scrollViewDidScroll is not called (I want to know if the user do the gesture for scroll to the top even if it is already at the top).
For this reason I thought to add a pan gesture to tableview but I saw that create problems about scrolling and the implementation is cumbersome.
I ask to you if you know another way to achieve this or the only way is adding pan gesture.
You should try to use scrollViewWillBeginDragging or scrollViewWillEndDragging
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In Swift, is there a way to change scrollview focus programatically? For example, in one of my scrollviews when a user is scrolling, after the scroll has gone past a certain distance I want the scroll to stop scrolling and to immediately scroll a tableview instead. I want this to all happen in the same motion/swipe, so I need to automatically shift the focus from the scrollview to the tableview using code. Is this possible?
Using Rikh's comment, I was able to solve this using a UITableView with multiple sections and custom UITableView headers. I can use the viewForHeaderInSection method to create a custom floating header which is exactly what I need and it scrolls much more smoothly.
I have created UITableView with Scrollview and given swipe gesture to swipe from left to right and vice-versa between three different views. Both of them don't seem to work with each other. On top of this I have a pull to refresh functionality on the UITableView. I have tried to implement UIGestureRecogniser delegate method but it doesn't seem to work.Any Suggestions?
I have realised that when the bouncing is disabled on the scrollview the swipe functionality works fine, but Pull-to-refresh does not work in this case.
I want my table view cell to show the Delete bar on the right side when the user swipes. However, the table view is in a UIScrollView, and although it is at the far right side, and swiping left does not move the scroll view, the table view cell makes it difficult to edit.
In order to trigger the swipe for editing, I must swipe very fast and in a perfectly horizontal line. The speed required is far more than you can expect users to even want to do, and would not be expected at all from a user's perspective.
I believe the scroll view is the cause, but I cannot be certain. No gesture recognizer is present.
How can I prevent the scroll view from mucking up this experience?
Putting a tableView or webView in a scrollView is not advised, because of the exact problem you are having. Your best bet is to find a way around putting it in a scrollView. Other than modifying your tableView to not be in the scrollView, you might try moving your tableView to the front. [superView bringSubviewToFront:tableView]; hope this helps.
You could try using the gesture recognizer delegate methods for this. I don't have Xcode in front of me, but if you use gestureRecognizer:shouldRequireFailureOfGestureRecognizer: and just fail the scrollView's swiping gesture if the gesture recognized is that of the swiping of the table view cell. Check UIGestureRecognizerDelegate in the docs.
I'm creating my views programmatically. I have a UITableView in my UIViewController subclass that I want to add a scrolling subview to that is not a cell. I want to add some text-based subview to the UITableView that scrolls with the table and starts out above y=0 so the user will only see it if he pushes the table down. That is, it should reside above the first section of my table. If it helps for visualization, I intend to make something similar to those "scroll down to refresh" features and want some indication to the user that scrolling down causes a refresh. Is there any way to do this without something messy like using another UITableViewCell to represent it or abusing the UITableView delegate methods to move a view around whenever the user scrolls?
Simply using [tableView addSubview:] in my viewWillLoad only makes it appear for a split-second then disappear once the table data is loaded. This seems weird to me because UITableView is a subclass of UIScrollView, which is meant to hold other views in it. Using [tableView.backgroundView addSubview] does nothing.
P.S. Why not use a UIRefreshControl for this? I'm still undecided but leaning towards not using one because I don't like how slow that spinning wheel "feels" when the refreshes are usually very very quick. I've been looking at other options like flashing the background subtly and only showing a wheel if it's taking a longer time than usual.
I You can implement pull to refresh with only a table view
To do this using the scroll view delegate, since tableview is a subclass of scroll view.
Set view controller to be the tableview delegate and implement
(void)scrollViewDidScroll:(UIScrollView *)scrollView
When scrollview content offset y value passed a point, add a label to the viewcontroller.view not tableview. When you scroll back or release, remove the view.
You might also be able to add label to the table view and set the frame origin to negative y value, so when you pull the label will move into view (Never tested this do might not work)
I'm building an iOS layout which consists of a UITableView and a UIScrollView. The UIScrollView is inside a table cell of the UITableView and can be scrolled both horizontally and vertically. The diagram below shows this situation. If the user begins scrolling down/up on the UIScrollView the scrolling event should trigger setContentOffset of the table view, and not setContentOffset for the scroll view while the top of the scroll view will be on the dotted line (it's constant height). Then a scrolling touch event should trigger setContentOffset for the scroll view, not for the table view.
In another case: When the user starts scrolling on the table view, it should trigger setContentOffset for the table view, until the scroll view reaches the dotted line. Then the scroll view should handle setContentOffset.
My problem is how to transfer touch events between the table view and the scroll view during one sliding action.
This sounds like one of those cases where you want something quite specific and custom. So trying to do something clever with the gesture recognizers won't be enough.
The main problem is that the ways you can control gesture recognizers such as with gestureRecognizer:shouldReceiveTouch: and gestureRecognizerShouldBegin: only affect the start of the gesture (or for new touches, not ongoing ones), but you want a single ongoing gesture to transition between controlling each view. So for this reason I think you will need to place a large transparent view over your entire screen with a pan gesture recognizer on it and in your handlePan method decide which view you want to adjust and then call setContentOffset directly on that view. You can use the translation of the pan recognizer and the existing content offset to calculate the new one. I know this isn't very elegant, but I can't think of another way to achieve the effect you want.
I'm not sure if this is going to work, but you could try doing something like this:
Option
self.scrollView.panGestureRecognizer = self.tableView.panGestureRecognizer;
Option
[self.scrollView addGestureRecognizer:self.tableView.panGestureRecognizer];
Option
[self.tableView.panGestureRecognizer requireGestureRecognizerToFail:self.scrollView.panGestureRecognizer];