React native flatlist dynamic height stack overflow. I am developing a react native app that shows data in the flatlist grid view. Setting the flex value to 1 on the ListHeaderComponentStyle prop will fix the jumpiness/text not showing but causes more problems while loading. Providing a number like height: 200 , does Jan 2, 2019 · I'm trying to create a nested Flatlist(Flatlist inside another Flatlist), with dynamic data that is fetched from webservices. As a workaround, you can listen to onLayout of the Flatlist, hold the calculated height in a state, and then set each child's height to flatlist height / data. You can set numColumns to the length of layoutData instead of 2. The flatlist is working good, no bug, but i cannot press the cursor of the scrollbar to navigate as in native Android or in html page. Most likely, though, the performance Feb 3, 2023 · 0. So using this flatList : const flatListRef = useRef(null); const [data, setData] = useState(generateData(20)); const renderItem = ({ item }) => {. Like if numColumns is 3 then it will be index%3. Yes is does, container style has flex: 1, width: "100%", the outside wrapper also has flex: 1, width: "100%" (outside white area with marginHorizontal as you can see) each box has a width + height of 80 - (width: 80, height: 80). Stack Overflow Jobs powered by Indeed: flatlist with dynamic numColumns. Issue: Each exercise can have a different amount of sets that are listed. I'm using inputRange and outputRange. <FlatList. I'm testing this with the Allocations instrument of xCode. dataArray={this. Beneath the list is a view that I want to fill the remaining space. 18 Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. I want to animate the deletion of FlatList Item on swiping to the left. Apr 22, 2024 · To render multiple columns, use the numColumns prop. Dec 2, 2018 · Here ItemSeparatorComponent will render horizontal border and render item will give it vertical border. Nov 7, 2023 · This is challenging because most optimized scrolling methods in React Native's FlatList depend on knowing the height of each item, which in my case, is not possible due to the dynamic nature of my list's content. Sep 8, 2020 · 2. So, I've tried to push data object to the end of the list's array, but new item replaces the last one. 22 FlatList Dynamic Height Sizing. flexbox. 54) I display a large list of items with flatlist . answered Dec 10, 2020 at 14:08. I would also like to have them fill up more of the red spacing. So when this height state value changes it will re-render the component. Currently i have more than 1000 number of data which contains audio messages, images etc. I'm trying to make a FlatList with a dynamic number of columns which looks like this: I'm defining the item the width and height with an item property. Apr 7, 2022 · It is because of you set numColumns = {2}, this makes FlatList renders every two items into a row. Using React Native and Expo: I have a horizontal FlatList that has a number of simple Text items within it. When I check the checkbox, I have to add a dropdown and two TextInputs and when I uncheck the checkbox, I have to remove these three. Aug 18, 2022 · All is wanted is that my entire screen should have an automatic height to it and FlatList contents never does out of the screen height. The FlatList component is supposed to be a performant solution for displaying large lists of data in your app. hmm this could work with minHeight as a backup plan, hoping to fix it with CSS only but will bear in mind, thanks! Feb 15, 2019 · In a react native screen, the top part is a flatlist, and the bottom part is a toolbar, with some buttons in it. In response of that thought my first thought is efficiency of this solution. React Native Flatlist numColumns is not making multiple columns. Mar 27, 2020 · The Flatlist lets you define an ItemSeparatorComponent that receive as default props highlighted and leadingItem. Dec 13, 2017 · However, because the data doesn't change, the list won't be rerendered on screen tilts. I put a border around the code rendering my list items but the list items are not the same height. 5 on double column doesn't allow for wrapping columns and always displays a single column row. 59, for layout I am using native base and react-native-easy-grid. Below example will work for two columns you can change the index%2 to whatever you numColumns is. changes. react native flatlist 2 items per row , width not equal Apr 28, 2022 · flex: 1, }); With the current code the avatars are shown in one row and only three and a half of them are shown, the other are hidden because of the width. You can set these values to state of your component, for example. Jul 7, 2018 · I will try to add react native popup menu in flatlist. import React, { Component } from "react"; import { Text, View, StyleSheet, FlatList } from " Aug 23, 2017 · When i add a blog in flatlist , it has text, images in it and item beside it . _keyExtractor} contentContainerStyle={{ flexDirection: 'row'}} Dec 13, 2022 · Stack Overflow Jobs powered by Indeed: A job site that puts thousands of tech jobs at your fingertips React Native - FlatList with dynamic height children. so i am looking for a solution so that items will be auto adjust before another item and don't maintain a scale to adjust the items. Hence, I can not for sure now when the user is interacting with the map. I would like to append some data at the begining of my data array in a transparent way to user. Im trying to implement a gridView, of 7 x 5 using a FlatList with numColumns. nativeElement. { id : "0", text : "Object 1"}, { id : "1", text : "Object 2"}, Mar 12, 2018 · I work on react native (react 16. In which inner Flatlist contain services. here is the Expo link. log(item); Nov 11, 2019 · the container in which you have added the flat list seems don't have the full 100% width. The Documentation provides a parameter called extraData: By passing extraData={this. Like so: <FlatList. ref="listRef". Images are downloaded from the server and are placed in the flatlist. In order for FlatList to be able to do this, it needs to know the total height of the rows above the currently visible viewport, so it can set the underlying ScrollView scroll . const renderItem = (height,setHeight) => {. react-native. var initialElements = [. 0. I have reproduced the problem in a snack where you can see a similar code. BTW in your case both width: '25%' and flex: 1 works, below is the code. May 10, 2020 · I am using list in drawer navigator, it contains two lists one is static, and the another is dynamic (items obtained from api), however i need to use a flatlist instead of list (for using onEndReached to implement infinite scroll), and when i use it the list becomes blank in any of them. However, the rows are still taking up space. here is a part of my code: <FlatList. Jun 5, 2023 · All exercises are displayed in a flatList vertically. I work fine. import React, { Component } from 'react'; import { View, StyleSheet,FlatList,Button } from 'react-native'; export default class App extends Component {. data={cities} renderItem={renderItem} keyExtractor={item => item. state. By passing extraData={selectedId} to FlatList we make sure FlatList itself will re-render when the state changes. I'm trying to implement an "onBeginReached" like props in flatlist. It has an isActive property that becomes true when a drag starts. Apparently my height: &quot;20%&quot; gets ignored so the grid is too small. I currently have two functions, inside function "ItemHolders", I have a flatlist that calls my second function, "WardrobeSubsection". I've been using the numColumns prop of the FlatList to specify 3 columns, and then setting flex:1 for my images so they should fill the space of the column. Can somebody guide me to solve the problem. When the user clicks on the button, the data from the text inputs should appear in the end of the FlatList. 2. Jul 17, 2021 · You can listen to onLayout of the Flatlist, hold the calculated height in a state, and then set each child's height to flatlist height / data. Aug 23, 2018 · Stack Overflow Public questions & answers; React Native - FlatList with dynamic height children. for that, I followed the code which I found on the expo. I have tried messing around with a lot of different things but nothing seems to work. numColumns={2} Jul 9, 2020 · If you want to render an n by n grid, you could utilize FlatList's numColumns property. I'm using the excellent package react-native-draggable-flatlist. This is happening right now: My UI Thi Dec 10, 2020 · 1. Oct 3, 2017 · Adding styles to each respective item flex: 1 on full width and flex: 0. However, the list expands vertically instead of shrinking to wrap the content. Aug 17, 2022 at 5:52. Its looks like a gallery view. The list that contains both lists (static and dynamic): Jun 1, 2020 · I have a React-Native application where I am using FlatList to display a list of items obtained from the server. Is it possible to give variable height to every item in row. 5. 1 Apr 18, 2019 · The problem is that when I am trying to shift a Responder item beyond the scope of the View component wrapping FlatList (height: 80) it is visually getting hidden and parent Component obviously overlaps it. length. asked Dec 13, 2021 at 7:36. I've been able to move yellow view above screen and make the green view I'm loading a dynamic form in a FlatList and I'm supposed to add few rows with TextInputs based on a condition. On adding blog to the flatlist video item has also taken height qual to the blog item. Mar 23, 2019 · 3. The problem is that I am using inverted on my Flatlist and my Seperators now need to adapt to the next item instead of the previous one. Even if you are not explicitly setting the height as a style, the computed height may be the same. Dec 4, 2023 · I am new at React Native and struggling with the FlatList component. Apr 1, 2019 · I'm using nested FlatList. This is happening right now: My UI Thi Is there a way to make the vertical flatlist item take full height? Hopefully using flex, without using Dimensions API since my flatlist is rendered inside stack and tab navigation, getting the available height is hard and if notch is present practically impossible to predict. I need to calculate how many items can be included in a row and display it. If possible share full code. I have items in diffrent heights (250 or 150) inside a FlatList, When iterate each item and append the state of the dataSrouce for the FlatList everything renders alright, but if I want to avoid the "appending" affect and set the dataSrouce to all of the items at once, it seem FlatList have a wierd bug where items are not getting their right Feb 21, 2024 · So I'm having some issues. Dec 19, 2019 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; React Native Flatlist height dynamic. 3. – neohuiji Jun 24, 2019 at 16:54 Mar 8, 2024 · In react native , I need to create a list with a number of items, but the texts are of different lengths. data} renderRow={item =>. 78. . state} to FlatList we make. S. How to set item height equal to FlatList height in react native? Mar 20, 2021 · 4. I want my items render evenly in fullscreen(Top image to Bottom image). What I hope is, when the hidden component is showing, the flatlist is pushed up, so that lower part content of flatlist will be still on the screen. But I want the overflow data to be scrollable inside this fixed height window. but the problem is menu has been displayed only two flatlist ite <MenuContext>; &lt;Men Apr 6, 2020 · I need to append this list with another elements. I compared many of them and this solution was the best comparing to development time and performance actually. Sep 7, 2018 · 4. You can see the outcome here Jun 20, 2021 · Stack Overflow Public questions & answers; FlatList Dynamic Height Sizing. so that I can use the empty space to show some data first. The problem is when using the scrollToEnd method, it only scrolls to the last item that is already rendered in the view (about item #20) but not to the last item in the data array. Feb 27, 2022 · I tried many libraries but most of them has no dynamic height calculation. Steps to Reproduce. This list can be of any size. Oct 17, 2021 · I want to open image on full size if click the images of the list, so I used ( (Modal)). The replacements of an exercise should be displayed horizontal. From the React Native docs: Feb 3, 2024 · I am trying to create a horizontal flatlist and within it, have multiple components called InstructionCards. That works fine. Without setting this prop, FlatList Mar 12, 2019 · 4. Nov 14, 2019 · In your code, you just need to fix the lines 87, and 132 to something like this: 87: key={'key'} 132: keyExtractor={(item) => ''+item} So react knows that even after render, those text inputs are the same as the ones before the setState update. Here is a little example of what i have: example FlatL. The methods scrollToIndex, scrollToItem require getItemLayout prop to be set. it's good for performance because it has no need to calculate the height of rows. For example, I have a checkbox. I recognize that the code is a little long but too simple, just focus only on the parent FlatList (in the App component Dec 30, 2023 · Despite using the setData function to update the state with a new item, the FlatList does not render the added item. The list has 2 columns and I need my list items to be the same height. answered Feb 8, 2021 at 11:18. Aug 26, 2020 · The first FlatList "A" has a greater height than the second one "B". and here is the code. 6. <FlatList Feb 13, 2021 · As metioned renderItem is not a react function just pass the height state value and its setter function as props from Parent component of renderItem(). It will give you access to height and width of the device, where the application is being used. I need to display every item with dynamic width and height. Feb 26, 2022 · React Native - FlatList with dynamic height children. Dec 1, 2021 · Stack Overflow Public questions & answers; React Native - FlatList with dynamic height children. The content of the FlatList is dynamic meaning that the length of the supplier array can change at anytime so I have a maxHeight and want it to simply be a list you can scroll through if the content extends the maxHeight. I am using flatlist and i am using 2 columns the problem is that height of the items is different in every time, as it is adjusting according to content and then space is left below on every item. 913 3 14 35. Feb 8, 2021 · 0. So you can also scroll to another item Jun 24, 2019 · I guess I need to subtract the height I pull up every time when I pull up this page until the FlatList is on the top of page. Jun 30, 2021 · The issue only appears when I do not give the header an explicit height and instead use the text size + padding to be the height (as the code snippet shows). Aug 28, 2020 · Stack Overflow Public questions & answers; how to react-native Flatlist dynamic height grid? 3. I'm using it to set css display: none on some rows when the category is LongPressed. The leading Item represents the item displayed before the Separator. Then you could just pass the data into the FlatList's data property to specify how to render each cell in the grid by passing a function in the renderItem property. Your answer looks like solution. Jan 27, 2020 · I wanted to design a FlatList with 4 rows, each row should occupy 1/4th height of FlatList with a spacing of 5px between each rows. I want a UI like this: Here I want to show card with dynamic height like in the photo, I tried using columns in flatlist but it takes same height in each row. When opening the app, I hit about 20mb. (2) The other strange thing is you're using both flex and heights. The console. only). If I disable scroll on the flatlist, every interaction with the map works smoothly. I guess measuring each and every content will slow down the performance of the Flatlist as the list has hundred's of rows. Setting the numColumns prop to 2 displays the products somewhat properly, but causes issues with the full width featured item. In the above image, blue boxes represents FlatList. If I change height or flex, It will shows 5 items in current backgroundImage space. Flatlist is scrollview with many item inside and ScrollView content will calculator height of children render on it. Is there any simpler way to do this? Was a solution ever found for this? Apr 13, 2018 · Stack Overflow Public questions & answers; React Native - FlatList with dynamic height children. return. I have already tried a lot of things and the best working solution so far is to do it like so: data={data} keyExtractor={this. So, I can't determine how many items can be included in a single row. Sep 28, 2022 · I think I figured out a solution. I am using react native 0. Each item has a responsive map which is rendered inside of a react-native-webview. The second problem is that the height of the FlatList is always the height of the biggest item. <View onLayout={event => setHeight(event. Grid view without using FlatList in React native. Once the inner flatlist data gets fetched, basing on the content I am trying to increase the parent flatlist item height. flatlist. Sep 6, 2017 · 2. Thought about chunking the items by 2 and having Jul 30, 2020 · 5. The contents of my Flatlist have variable height. Try adding numColumns= {3} to the flatlist. I'm starting to learn React Native, and I'm trying to create grid of 3 columns with images. As a native iOS developer, I am a bit confused how this can be implemented in react-native's FlatList. Jun 7, 2017 · I want the List components to be of fixed height, say 500. When I scroll down in the FlatList, I want the green and yellow view to move above the screen and I want the green part to be sticky at top of the screen while the yellow view disappears from the top of the screen. <ListItem>. When I choose the second list, its height is the same as the "A" FlatList's one. Please can someone advise? Nov 7, 2018 · I know this has been asked multiple times, but none of the solutions mentioned seem to be working for me. So, I'm using Animated API of react native and want to make the height of FlatList item 0 in 1000ms after swiping. Currently, it appears as absolute to the current renderItem, but it's positioned behind the rest of the items in the Feb 8, 2018 · React Native FlatList optimises list view performance by only rendering rows that are currently visible on the screen, and unmounting rows that have been scrolled past. Share Improve this answer Aug 17, 2022 · With position, fixed, sticky, or absolute you need the parent to be position: relative. It helps if your flat list items are of the same height (assuming May 12, 2017 · React Native FlatList - Rendering List Items With Dynamic Sizes 3 FlatList is not being visible when i set Flex=1 to the top most view Oct 22, 2018 · Stack Overflow Public questions & answers; Scrolling React Native FlatList to negative offset. As you can see below. React Native Flatlist height dynamic. layout. And, there is also a hidden component which shows when a button is pressed. My first thought - try render it hidden, take size and make it visible. Aug 8, 2017 · So you need to wrap the Button component in View and apply styles to that View. in this function you are saying to FlatList that your rows heigh must be 200. data={photosList} numColumns={3} renderItem={({ item }) => (. I want to position all items at the bottom. The goal is to make drag/drop by top level category easier. My issue is that when I check the checkbox and enter some value in Aug 2, 2021 · I have implemented a list like Instagram explore page using this question React native grid like instagram but it is not performant at all with the layout I have. My issue is only with the Samsung device. How I can be acheived both cases like automatic screen height and auto height of FlatList content May 15, 2019 · 1. So any item render on it need set height. please see the image. I have a flatlist that renders a bunch of items. I need view1 to be displayed above all other items. but my modal is "static" and bring up just a picture! I want to click on each images of list to open that image ! like photo gallery . When the user is scrolling horizontally the height of the nested FlatList doesn't change accordingly. As an update I suggest using FlatList-s rather than ListView-s, I haven't tried that, but maybe you'd need to prevent individual FlatList-s from scrolling if columns are scrolled individually. Since you have const renderItem = ({ item }) => (<Item title={item} />), in Item you should be getting title as part of props. The below is the view I am working From App. I'm getting the values of swipe and able to delete the item but it is not smooth. We can take the example of a contact list with 1000 employees. So, Looking for a better solution. The card library should allow you to pass children in but you will have to write it like this <Card>{popup()}</Card> but I'm not sure if it will allow you to set the style to position: relative; – PetrolHead. id} horizontal={true} />. The user would basically be swiping the ScrollView. May 2, 2023 · Also, if the FlatList only contains 1 item, the height should be just the height of the item and not have scroll, since there will be enough space to show the item, and the scroll should appear only after the height is not enough to show all items (and of course, all the other content in the screen can't shrink or anything like that). I am not aware at what stage of rendering of row component, the calculation can be applied. However, this results in some of the items being differently sized from one another. (1) if the container height is 100 * x then each item should have height 100 (as opposed to your 100/x. More complex, selectable example below. Jun 28, 2021 · FlatList is having issues, when I render many cells on the screen. If your list items consistently have the same height, you can pass it to that prop to prevent React Native from having to measure them every time. Feb 22, 2019 · Thanks, updating the state was a little bit difficult, the items array I've used has been declared outside the class component, thus only using an "active" array with indices that should change color in the state wasn't enough, I had to map the items array in the state like so: Apr 30, 2021 · 1. First large item and second item are in the same row, third item and forth item are in the new row. i. 0 React Native FlatList don't scroll. Nov 28, 2017 · Stack Overflow Jobs powered by Indeed: A job site that puts thousands of tech jobs at your fingertips (U. Please take a look at the below image first. e image or video also gets the height of the blog item. It only displays some of the items in the list according to which items are currently visible. Feb 7, 2019 · Stack Overflow Public questions & answers; FlatList Dynamic Height Sizing. Well, I think the solution is to create ItemView for each section and each ItemView will be another FlatList with horizontal scrolling, so basically you will have one external list with vertical scrolling where each item is FlatList with horizontal scrolling customised by index of the external list. Oct 23, 2017 · getItemLayout = (data, index) => {. Feb 12, 2021 · 1. But what I need is, I want the first row should render one item only. Now you have height and width of a device that uses your application. However flex:1 makes none of my images appear, while trying height:100,aspectRatio:1 shows all Feb 21, 2017 · @DrorBar The lists are wrapped in a ScrollView, so all 3 columns would be scrolled by a single gesture. React-native FlatList items not get to right height. it is starting almost middle of the screen, and I would like to show it until the footer bar. height)}>. You can find this by inspecting your items in dev tools. 2. Because of different size of mobile device, I need to put flatlist height dynamic. Using this approach instead of a flexWrap layout can prevent conflicts with the item height logic. Flatlist comes with many good feature like that. AliRehman7141. Jan 15, 2020 · Is it possible to allow an item to overflow the container of the FlatList component? In this example, the items in the FlatList are regular View components, that have a "popover" View component inside of them that I would like to display over the boundaries of the FlatList container. There's obviously no way of knowing, pre render, the height of a rendered FlatList item. height 100% will get height of parent and set for itself so you can not using height of scrollview content (infinity) and set for item inside. is there any other way to implemen Jun 28, 2020 · 1. Feb 23, 2024 · I have a list of chat messages (using React Native Gifted Chat, similar to using a FlatList), and I'm using an absolute view (let's call it view1) for each renderItem within it. Example List: <List. Below are my code: Page with Flatlist: import { Text, View,Pressable, StyleSheet I'm new to React Native. Solution - initialize a state prop, itemHeight for eg, to null or 0, then send an array containing only a single item to the data prop of the FlatList. Image dimensions are 512 x 512, with about 500kB for each image as size. Related questions. Provide Dec 13, 2021 · I have a screen in my design it will contain multiple images. log inside the handleAddItem function shows that the state is updating correctly. Mar 30, 2021 · I'm using FastImage to display images in a flatlist in my react native app. EDIT: You also can try use react-native-text-size to calculate cell heights manually. Mar 20, 2018 · If you want to have dynamic height, you need to use Dimensions module of react-native. Nov 26, 2017 · 2. So there will be a spot beside the second item. That said there are a few tricks that help to make it faster / lighter. Still, I cant manage to fix this same bug in my project. In this case the expected result is to show the avatars in 3 rows, three avatars in the first two rows and one avatar in the last one. selected. js Jan 1, 2018 · 1. Already try this: Scrolling issues with FlatList when ro May 14, 2017 · Stack Overflow Public questions & answers; FlatList Dynamic Height Sizing. Oct 2, 2023 · I want a UI like this: Here I want to show card with dynamic height like in the photo, I tried using columns in flatlist but it takes same height in each row. Oct 8, 2019 · I have 5 items in FlatList. The first problem is that all items are positioned at the top. I am able to get the FlatList working but the FULL image is not being displayed for each Item (it appears as though only the top left of the image is being displayed). 0 , react native 0. Also, the height of FlatList should be changed based on content/items in it rather than giving any fixed height. 1. Sep 13, 2020 · Not sure if this is why but your height calculations seem strange to me. May 2, 2019 · My requirement is to display in the view a new item just added to the end of the list rendered by a FlatList. sure FlatList itself will re-render when the state. Mar 4, 2021 · I'm trying to set height of flatlist container equal to height equal to space taken by it's item like in the image below but I'm getting the same result 2nd item container took same space as 1st Feb 5, 2022 · In order to have items on a row, all you need is to add horizontal={true} on FlatList. 18. I am trying to use the FlatList in my expo React Native application. console. return { length: 200, offset: 200 * index, index }; here is a function you can use as getItemLayout prop of FlatList. Each image is 717x717 in dimension. Dec 3, 2017 · In the FlatList are items with different height. Let's say we have: A map with row x column = 80 x 80 = 6400 cells A button to enabl May 7, 2018 · 5. eh ew jp gu re vl zp lr px do