Now that we know how to customize the look of our headers, let's make them sentient! Actually perhaps that's ambitious, let's just make them able to respond to our touches in very well defined ways. The most common way to interact with a header is by tapping on a button either to the left or the right of the title.
Let's add a button to the right side of the header one of the most difficult places to touch on your entire screen, depending on finger and phone size, but also a normal place to put buttons. When we define our button this way, the this variable in options is not the HomeScreen instance, so you can't call setState or any instance methods on it. This is pretty important because it's extremely common to want the buttons in your header to interact with the screen that the header belongs to.
So, we will look how to do this next. To be able to interact with the screen component, we need to use navigation. By using navigation. On iOS this includes a label next to the button, which shows the title of the previous screen when the title fits in the available space, otherwise it says "Back". To customize the back button image, you can use headerBackImage. The back button will be rendered automatically in a stack navigator whenever it is possible for the user to go back from their current screen — in other words, the back button will be rendered whenever there is more than one screen in the stack.
Generally, this is what you want. But it's possible that in some circumstances that you want to customize the back button more than you can through the options mentioned above, in which case you can set the headerLeft option to a React Element that will be rendered, just as we did with headerRight.React Native Hacks (Hindi)#7 : Select Previous Tab on Back Button (React Native Navigation)
Alternatively, the headerLeft option also accepts a React Component, which can be used, for example, for overriding the onPress behavior of the back button. Read more about this in the api reference. React Navigation. Menu Fundamentals Getting started Hello React Navigation Moving between screens Passing parameters to routes Configuring the header bar Header buttons Nesting navigators Navigation lifecycle Opening a full-screen modal App containers Next steps Glossary of terms Compatibility layer Troubleshooting Limitations Guides Tab navigation Drawer navigation Authentication flows Supporting safe areas Different status bar configuration based on route Screen options resolution Custom Android back button behavior Access the navigation prop from any component Navigating without the navigation prop Deep linking Screen tracking for analytics Themes State persistence Type checking with TypeScript Redux integration MobX State Tree integration Localization Web support Call a function when focused screen changes Optimize memory usage and performance Upgrading from 4.
Version: 5. Adding a button to the header The most common way to interact with a header is by tapping on a button either to the left or the right of the title. Edit this page. Adding a button to the header Header interaction with its screen component Customizing the back button Overriding the back button Summary.The Android back button adds an additional navigation option that is crucial to manage when developing an application.
Commonly a button is rendered in the top left to navigate backwards, or utilizing gestures. If not handled your users may potentially lose information they've entered into your app. Not only that you may want to control the back navigation based upon the state of your application. We'll start with a basic setup already. We'll start by using createStackNavigator to create a stack of screens that can be navigated to. In our case we just have 2, the Home screen which is the default and the profile screen.
The home screen is just a way to navigate to another screen with the application. By default React Navigation will handle the Android back button for you, however we'll need to override the defaults. If you're at the top of the stack and press the android back button the application will close. If you've navigated within the stack anywhere then the screen will pop.
By default if the android back button was pressed here the stack would pop and would navigate back to the home screen. Here in the profile we'll simulate what it would be like to have a form that is editable. Additionally you may want to control saving, or validation based upon the users actions.
To simplify logic across your application we'll create a HandleBack component. All it will do is render the children provided but we'll use the higher order component withNavigation to be able to get access to the current state of our entire application navigation. React Navigation has life cycle hooks. These listeners all us to hook into the life cycle of our apps navigation. When registered it'll tell us when the current screen focuses, as well as when the current screen blurs as you navigate towards a different screen.
Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I want to override action behavior in headerLeft back buttonbut I don't want to change view, use default view of react navigation. How are we doing? Please help us improve Stack Overflow.
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Asked 2 years, 6 months ago. Active 1 year, 8 months ago. Viewed times. How to override, and add action to default headerLeft backButton? Wuttipong Khemphetjetsada Wuttipong Khemphetjetsada 3 3 gold badges 7 7 silver badges 16 16 bronze badges.
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Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. Thankyou Fuhrmannits working. Fuhrmann any way to make this with the app back button too?
JFE84 I am not on pc right now, but maybe you could try this: comment. I didn't test this approach, so I don't know if it will work. Fuhrmann yes that works, thanks. JFE84 Nice, good to know! Now that overrideBackPress: true is bugged on Android, Fuhrmann solution has saved me, thanks!
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Fuhrmann I have to put the above code in all screens? I guess it depends on your screens setup. Fuhrmann Thanks for quick reply. So did you find any good alternative for React Native.
If yes, then please suggest. I had to stick with Android development. Fuhrmann can you check this issue. I used your solution. But It did not work for me :.By default, when user presses the Android hardware back button, react-navigation will pop a screen or exit the app if there are no screens to pop.
This is a sensible default behavior, but there are situations when you might want to implement custom handling. As an example, consider a screen where user is selecting items in a list, and a "selection mode" is active.
On a back button press, you would first want the "selection mode" to be deactivated, and the screen should be popped only on the second back button press. The following code snippet demonstrates the situation.
We make use of BackHandler which comes with react-native along with the useFocusEffect hook to add our custom hardwareBackPress listener. Returning true from onBackPress denotes that we have handled the event, and react-navigation's listener will not get called, thus not popping the screen. Returning false will cause the event to bubble up and react-navigation's listener will pop the screen. The presented approach will work well for screens that are shown in a StackNavigator.
Custom back button handling in other situations may not be supported at the moment eg. A known case when this does not work is when you want to handle back button press in an open drawer. PRs for such use cases are welcome! At first, you may be inclined to use componentDidMount to subscribe for the back press event and componentWillUnmount to unsubscribe, or use useEffect to add the listener. This approach will not work - learn more about this in navigation lifecycle.
React Navigation. Menu Fundamentals Getting started Hello React Navigation Moving between screens Passing parameters to routes Configuring the header bar Header buttons Nesting navigators Navigation lifecycle Opening a full-screen modal App containers Next steps Glossary of terms Compatibility layer Troubleshooting Limitations Guides Tab navigation Drawer navigation Authentication flows Supporting safe areas Different status bar configuration based on route Screen options resolution Custom Android back button behavior Access the navigation prop from any component Navigating without the navigation prop Deep linking Screen tracking for analytics Themes State persistence Type checking with TypeScript Redux integration MobX State Tree integration Localization Web support Call a function when focused screen changes Optimize memory usage and performance Upgrading from 4.
Well, I have a react-native app with multiple screen, each screen having a top bar where a back button is situated, it's main behavior is that the app returns to the main screen when this button is pressed. What I want to do is to copy this behavior to the hardware back button now by pressing on hardware back button the app closeshow can I do this? If you are using react-navigation with Redux you should implement the popToTop as an action to dispatch.
So if you are using react-navigation and reduxyou can take a look at docs - Handling the Hardware Back Button in Android. The way of displaying the button might be different but this will work!
If any issue write in the comments. Learn more. React-native android back button in react-navigation Ask Question. Asked 1 year, 10 months ago.
Active 7 months ago. Viewed 11k times. MohamadKh75 1, 3 3 gold badges 14 14 silver badges 31 31 bronze badges. Can you please show how you added react-navigation configuration? Active Oldest Votes. Just what I needed, thanks! After looking your answer, I got the idea.Mobile apps are rarely made up of a single screen. Managing the presentation of, and transition between, multiple screens is typically handled by what is known as a navigator.
This guide covers the various navigation components available in React Native.
Navigating Between Screens
If you are getting started with navigation, you will probably want to use React Navigation. React Navigation provides a straightforward navigation solution, with the ability to present common stack navigation and tabbed navigation patterns on both Android and iOS.
If you'd like to achieve a native look and feel on both Android and iOS, or you're integrating React Native into an app that already manages navigation natively, the following library provides native navigation on both platforms: react-native-navigation. The community solution to navigation is a standalone library that allows developers to set up the screens of an app with a few lines of code.
Next, install the required peer dependencies. You need to run different commands depending on whether your project is an Expo managed project or a bare React Native project. Then install the pods to complete the installation:. Note: You might get warnings related to peer dependencies after installation. They are usually caused by incorrect version ranges specified in some packages. You can safely ignore most warnings as long as your app builds. To finalize installation of react-native-gesture-handleradd the following at the top make sure it's at the top and there's nothing else before it of your entry file, such as index.
Now, you need to wrap the whole app in NavigationContainer. Usually you'd do this in your entry file, such as index. In this example, there are 2 screens Home and Profile defined using the Stack. Screen component.
Similarly, you can define as many screens as you like. You can set options such as the screen title for each screen in the options prop of Stack. Each screen takes a component prop that is a React component. Those components receive a prop called navigation which has various methods to link to other screens.
For example, you can use navigation. The views in the stack navigator use native components and the Animated library to deliver 60fps animations that are run on the native thread. Plus, the animations and gestures can be customized.
React Navigation also has packages for different kind of navigators such as tabs and drawer.
You can use them to implement various patterns in your app. Inclusion Accessibility.