Is there any way to set when the flatlist should become scrollable, I don't want my list items to get all the way to the bottom of the screen. I want it to start scrolling at a certain point in the array.
Related
In my application I want to create a couple animations on my FlatList.
For example, after fetching the data and feeding it to the list I want the items that should be visible to slide from the left. When I'm scrolling each item (at the top) that supposed to disappear will slide out to the right and each item that should appear (at the bottom) should slide from the left. Is it possible in React Native?
I only managed to create one type of animation - items sliding right when they are about to disappear, but I don't have any idea how to make the items to appear from the left.
My Animated.View can receive only one type of transform. So how can create different types of input/output ranges for the top and the bottom of the list?
I tried to find some examples on the internet but couldn't find any for multiple animations, only for one type.
I think you will find React Native Reanimated's Entering and Exiting Animations API
useful for this task. It greatly simplifies animations like this in my experience.
In case you want to get more control. Using a FlatList, you can also use its onScroll prop to get the current value for YOffset (contentOffset.y) via the Reanimated useAnimatedScrollHandler. Thus you can figure out how much has been scrolled.
Which you could then use to manually apply any translateX's required to the Animated.View of whatever items the flatlist is rendering. The logic you'll of course have to figure out though. But it's a start.
Be sure to do any animation interpolates using UI thread worklets on Reanimated only. Good luck!
I am trying to implement static list sized pagination in react native (i.e) will have static list size and on scrolling based on the threshold (say 80% list viewability reached) will add more item at bottom and will remove list items from top. Same way while scrolling up will add list items at top and will remove at bottom.
Issue I am facing is, while on scrolling the listRef.scrollToOffSet (I used getLayout props to find out the height to be adjusted) is not working. It is working fine if I add debugger while dev testing. But without debugger the list is not moving to the specified offset.
Can you please help me out to figure how to implement the same?
As shown in the attached gif, the navigation bar at the bottom and the URL bar at the top are pushed in and out(not just show/hide at once) of view as user scrolls. How can I achieve this 'hiding' effect in React Native? The key point is that the hiding speed of the component should correspond to the scrolling speed.
I have tried giving negative values to the top and bottom, like so:
style={{bottom:dynamicallyChangingScrolledValue()}}
although it does push the view out of the screen, space where the component used to remain in the blank, occupied.
Are they using animations here? or changing some offset value dynamically by incrementing a small amount?
I have a FlatList with multiple items of different (unpredictable) heights and after some user gesture I disable the FlatList scrolling and use a separate PanResponder to track the user's touch position as it moves over the "non-scrolling" list.
My problem is I can't figured out how to map the screen position (x, y) provided by the PanResponder to the list item that is under the user's finger. (Ideally I'd like to get both the list item index and the offset within the list item's bounding frame if possible.) I want this info so I can alter the list item's appearance as the finger moves over each item.
I've looked through the docs and searched for answers but not finding anything.
Any thoughts/recommendations on how to do this mapping?
Using stickyHeaderIndices (Ref: stickyHeaderIndices) property of listview in react native, it is possible to stick a scrolling row stick on the top of the listview. Is there any way to do the same behavior for sticking the row at the bottom, when the row reaches the bottom of the list?