Questions tagged [react-native]
React Native is a JavaScript library used to build native mobile apps using React. The focus of React Native is on developer efficiency across all the platforms you care about - learn once, write anywhere.
react-native
141,761
questions
121
votes
12
answers
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how to delete installed library form react native project
I have installed a third party library in my project but it is not working , so I want to delete that library from my project ,
How can I do that ?
- 5,091
121
votes
11
answers
113k
views
React Native global styles
I'm new with React and I understand the benefits of the component based, inline styles. But I'm wondering if there is a decent way to have some sort of global style. For instance, I'd like to use the ...
- 2,065
121
votes
8
answers
172k
views
What is the quickest way to convert a React app to React Native? [closed]
This may be a naive question, but I couldn't find too much information on this topic.
I have a fully functional react-redux application and I would now like to port it to iOS and Android. I have no ...
- 1,581
120
votes
22
answers
333k
views
Image resizing in React Native
I am trying to resize an image (smaller to fit screen) in my react native app but am unable to do it as it is too big.
Here is the code:
'use strict';
var React = require('react-native');
var {
...
- 1,657
120
votes
4
answers
58k
views
When to use TouchableNativeFeedback, TouchableHighlight or TouchableOpacity?
In React Native, there are at least three ways to make a button: TouchableNativeFeedback, TouchableHighlight and TouchableOpacity. There is also TouchableWithoutFeedback, which the documentation ...
- 4,388
119
votes
7
answers
190k
views
How to set <Text> text to upper case in react native
How to set <Text> some text </Text> as upper case in react native?
<Text style={{}}> Test </Text>
Need to show that Test as TEST.
- 3,032
118
votes
22
answers
107k
views
React Native ios build : Can't find node
I have a prototype ready to go and the project is jammed with build:
error: Can't find 'node' binary to build React Native bundle If you
have non-standard nodejs installation, select your project ...
- 2,771
118
votes
10
answers
217k
views
Error: Could not initialize class com.android.sdklib.repository.AndroidSdkHandler
I've setup the environment for react native on Windows. But when I run the command
react-native run-android
I get the following errors -
* What went wrong:
A problem occurred configuring project ':...
- 1,181
118
votes
14
answers
208k
views
How to set image width to be 100% and height to be auto in react native?
I am trying to display list of images in a scrollview. Width should be 100%, while height should be automatic, keeping aspect ratio.
The searches I did pointed to various solutions which give ...
- 1,393
117
votes
36
answers
168k
views
React Native : Error: Duplicate resources - Android
I was trying to create a release apk file from Android but when I create a release apk with PNG image I'm getting Duplicate Resource error. Initially I thought this is happening because I made a ...
- 4,610
117
votes
5
answers
155k
views
How to use border radius only for 1 corner (react-native)?
How to use border radius in React Native only for 1 corner?
I have a modal window
As you can see bottom corners not rounded, it happens when I used backgroundColor for buttons. I was trying to set ...
- 2,436
116
votes
8
answers
91k
views
Is there a way in which I can ignore touch events on Text in React Native?
I want to implement floating labels, for this I have a Text Component Above a TextInput. I want to ignore all the touch events on the Text so that the TextInput under it gets all the events. Is there ...
- 2,837
116
votes
23
answers
363k
views
React Native: JAVA_HOME is not set and no 'java' command could be found in your PATH
I've followed step by step the official Getting Started. I started from a clean linux install and installed everything required as per the "Building Projects with Native Code" tab. I have also read ...
- 27.9k
116
votes
16
answers
226k
views
Resetting the navigation stack for the home screen (React Navigation and React Native)
I've got a problem with the navigation of React Navigation and React Native. It is about resetting navigation and returning to the home screen.
I've build a StackNavigator inside of a DrawerNavigator,...
- 2,069
116
votes
13
answers
81k
views
iOS Launch screen in React Native
I'm working with a React Native app and I'm trying to set a customize launch screen but I'm not able to.
React Native creates a LaunchScreen.xib by default, so I've created a LaunchImage inside Images....
- 6,176
115
votes
27
answers
237k
views
Error: Unable to resolve module `react-native-gesture-handler`
I try to use navigate in react-native..
I added : npm install --save react-navigation
but it gives me an error like this :
error: bundling failed: Error: Unable to resolve module react-native-...
- 2,513
114
votes
17
answers
122k
views
React Native Android Build Error MainActivity.java:29: error: cannot find symbol
I'm getting this error when trying to compile my React Native android app.
The Android app can't resolve BuildConfig.DEBUG.
:app:processDebugJavaRes UP-TO-DATE
:app:compileDebugJavaWithJavac
/Users/...
- 5,364
113
votes
4
answers
52k
views
React Native Animated, Complete Event
What's the best practice to trigger an event when Animated.spring finishes?
Animated.spring(this.state.pan, {
toValue: 0
}).start()
I've searched quite a bit and haven't found a single way to do ...
- 4,897
112
votes
6
answers
139k
views
Simulate display: inline in React Native
React Native doesn't support the CSS display property, and by default all elements use the behavior of display: flex (no inline-flex either). Most non-flex layouts can be simulated with flex ...
- 5,734
112
votes
10
answers
236k
views
useDispatch() Error: Could not find react-redux context value; please ensure the component is wrapped in a <Provider>
I am trygin to use React-Redux library and I am getting the error on the title. I wrapped my components with Provider but I still get the error, only if I implement the useDispatch() hook.
The app ...
- 2,291
111
votes
9
answers
205k
views
React Native: Getting the position of an element
I am styling an Image component with flexbox to be in the center of the screen which works pretty well. Now I want a second Image component to be displayed directly on the top of the first one. The ...
- 2,051
111
votes
14
answers
215k
views
error: package com.android.annotations does not exist
I have the following class
import com.android.annotations.NonNullByDefault;
@NonNullByDefault
public final class Log {
...
}
and here is my build.gradle file (some parts omitted)
apply plugin: ...
- 2,097
111
votes
11
answers
97k
views
How to prevent layout from overlapping with iOS status bar
I am working on tutorial for React Native navigation. I found out that all layout starts loading from top of screen instead of below of the status bar. This causes most layouts to overlap with the ...
- 1,538
110
votes
30
answers
123k
views
Error: EMFILE: too many open files - React Native CLI
I try to run a react-native-cli project using react-native start, and the metro bundler fails, saying the following:
events.js 187
throw er; //Unhandled 'error' event
Error: EMFILE: too many open ...
- 1,820
110
votes
32
answers
255k
views
npm install Error: rollbackFailedOptional
When I try npm install new packages it shows me this error:
rollbackFailedOptional: verb npm-session 585aaecfe5f9a82
node --version
8.4.0
npm --version
5.3.0
- 1,101
110
votes
11
answers
117k
views
React Native error: "Could not determine java version from '9.0.1'."
I'm working on MacOS and just starting with react-native.
One of the first steps to get started is to run: react-native run-android or react-native run-ios. But I'm getting this error:
react-native ...
- 7,804
109
votes
18
answers
181k
views
React native ERROR Packager can't listen on port 8081
When I run command react-native start, it shows Packager can't listen on port 8081.
I know the issue is about software using my port 8081 .
I use Resource Monitor to see the port, but I can't find ...
- 5,650
109
votes
10
answers
134k
views
How to detect when keyboard is opened or closed in React Native
How to detect if user close the keyboard in react native, I want to call a function when user closed the keyboard.
and if you can answer to detect keyboard is open too it will be appreciated, thanks. ...
- 3,635
109
votes
14
answers
59k
views
Xcode throws 'atomic_notify_one<unsigned long>' is unavailable
I installed Xcode 12 on my Mac, tried building my react native app that runs perfectly on android, and get 'atomic_notify_one<unsigned long>' is unavailable. This is the most information I get ...
- 2,043
109
votes
20
answers
216k
views
How can I regenerate ios folder in React Native project?
So a while ago I deleted the /ios directory in my react native app (let's call it X). I've been developing and testing using the android emulator but now I'd like to make sure it works on ios with ...
- 1,534
108
votes
14
answers
202k
views
How to set iOS status bar background color in React Native?
Is there a single place in the react native iOS native code that I could modify to set iOS statusbar backgroundColor? RCTRootView.m ?
The react native StatusBar component only support backgroundColor ...
- 5,379
108
votes
17
answers
57k
views
Xcode 15: Unable to boot the Simulator
I was able to run iOS simulator fine with Xcode 14 and my Mac recently updated the latest version of Xcode which is 15 then I'm no longer able to boot a device from its new simulator.
I did try many ...
- 16.9k
108
votes
12
answers
131k
views
How to get a versionName in react-native app on Android?
I've made a timestamped versionName in build.gradle like 20150707.1125. I want to show the version of the package in react-native app in about window. How I could get versionName in code?
- 1,083
108
votes
23
answers
193k
views
How to re-render flatlist?
Unlike ListView we can update this.state.datasource. Is there any method or example to update FlatList or re-render it?
My goal is to update the text value when user press button ...
renderEntries({ ...
- 2,064
108
votes
16
answers
56k
views
'event2/event-config.h' file not found
I am trying to build a react-native app in iOS but unfortunately coming across the following issue (referring to libevent/Flipper):
'event2/event-config.h' file not found
I have react-native v0.63.4 ...
- 1,299
108
votes
14
answers
208k
views
Make an item stick to the bottom using flex in react-native
Suppose this is the layout:
<View style={styles.container}>
<View style={styles.titleWrapper}>
...
...
</View>
<View style={styles.inputWrapper}>
...
- 1,739
108
votes
15
answers
146k
views
React Native FlatList with columns, Last item width
I'm using a FlatList to show a list of items in two columns
<FlatList style={{margin:5}}
data={this.state.items}
numColumns={2}
keyExtractor={(item, index) => item.id }
renderItem={(...
- 4,052
107
votes
15
answers
123k
views
Renaming a React Native project?
Are there instructions for what needs to be changed in order to rename a React Native project? I have an app called something along the lines of MyAppIOS and I want to rename it to simply MyApp (now ...
- 13.3k
107
votes
5
answers
154k
views
Change React-Native TextInput's placeholder color
I'm creating an Android app using React Native in which there's a form. The placeholder doesn't even appear for the TextInput fields so I thought of changing the placeholder color but I don't know how ...
- 2,434
107
votes
14
answers
257k
views
How can I put an icon inside a TextInput in React Native?
I am thinking of having something like this https://android-arsenal.com/details/1/3941 where you have icon that you press to show password as plaintext, not as dots. However, I was unable to find any ...
- 7,059
107
votes
12
answers
213k
views
In React Native, how do I put a view on top of another view, with part of it lying outside the bounds of the view behind?
I'm trying to make a layout as per below with React Native.
How do I specify the position of B relative to A?
With iOS Interface Builder and autoconstraints, this can very explicitly be done and is ...
- 4,873
107
votes
16
answers
159k
views
React Native iOS and Android folders not present
I'm new to react native, and I've been having some trouble understanding the folder structure of the app which should supposedly be present in the project folder on creation. Basically, when creating ...
- 1,235
107
votes
3
answers
66k
views
React Native DEV and PROD variables
How do I know if my React Native app is running in production or development? Is there some sort of way within JavaScript to tell? Is there a global that is passed in?
- 6,265
107
votes
8
answers
164k
views
How can I run background tasks in React Native?
I've built a little iOS app in React Native that does location tracking, sending the lat/lng regularly to a server of the user's choosing. However this only works when the app is in the foreground. ...
- 14.3k
107
votes
8
answers
198k
views
How to use global variables in React Native?
In React Native I want to use global variables when I am moving between different screens
Can anyone help me how to achieve it?
- 1,127
106
votes
7
answers
86k
views
React Native: vertical centering when using ScrollView
I'm using React Native and I'm having trouble retaining vertical centering of elements as soon as I introduce a ScrollView. To demonstrate, I created 3 apps with React Native Playground. All ...
- 56.6k