How to pass props from one page to another without using navigation props?
Values can be passed by navigation props but without that how to do so?
This is a very broad question, but I will attempt an answer. The answer of course is, it depends. If you do not want to use navigation, then I recommend you lift up the state. In other words, place the the props to want to pass between screens in the state of a component that is the parent of both screens. The parent component can set the props of its children based on the state. You can use callback props on the children to set the parent components' state.
Another way to lift up the state and share data between components is to use a global state manager such as Redux. This allows you to have any component set the global state and have any component take in portions of the global state as props.
Either of these options will allow you to pass data between components.
Related
https://reactjs.org/docs/context.html states:
Context is primarily used when some data needs to be accessible by many components at different nesting levels. Apply it sparingly because it makes component reuse more difficult.
https://reactnavigation.org/docs/hello-react-navigation states:
Note: By default, React Navigation applies optimizations to screen components to prevent unnecessary renders. Using a render callback removes those optimizations. So if you use a render callback, you'll need to ensure that you use React.memo or React.PureComponent for your screen components to avoid performance issues.
and also states:
Use React context and wrap the navigator with a context provider to pass data to the screens (recommended).
Use a render callback for the screen instead of specifying a component prop:
This implies in React Navigation, for performance, you really want context which destroys the re-usability. Is there a 3rd way (e.g. recoiljs or any other things that may have come about)? I am hoping to possibly get the best of both somehow.
if i'm getting you right you want to pass props to another component without props drilling.
what i would suggest is to use the navigation hook navigate/push methods like this -
const navigation = useNavigation()
onPress={() => navigation.push('ScreenName',{'item': item})}
onPress={() => navigation.navigate('ScreenName',{'item': item})}
when item is the prop, and in the other screen you could accsess it using
route.params.item
I am using functional components and have implemented the following workflow using React Native. I have a parent component that retrieves the current location via a custom hook (using the useState and useEffect hooks) and has registered watchPositionAsync. The location is updated on the parent component. On the parent component, I use a FlatList with onPress that navigates to the next screen as a child component with some props. One of them is the "updated" location.
When I click on the list item, the current location is sent to the child component.
Now the location changes by the listener, but the updated location will only be sent to the parent component and not to the child component. How do I have to use hooks to register the updated location at the child?
The implementation is a bit like on http://5.9.10.113/67799305/how-to-add-clickable-flatlist-item-and-navigate-to-detail-component-in-react-nat
just with a dynamic url from the home component as a prop of Detail.
you can use the redux or the context api. here is the simple solution has already been answered here.
Pass data from one class to another class that resides on the same level without navigating in react native.
Passing props or state between two components that are on the same level within your component tree is not possible in React. As a general rule of thumb in React: when two adjacent components need the same data, it is probably better to "lift" the property up a level in your hierarchy and pass the props to both components separately.
So in my app I have a main component which have switch navigator and then inside switch navigator I have a tab navigator which renders different screens. I have registered notification handler in top component.
Now the problem is that when notification is received, I want to make some changes on screens inside tab navigator.
I have read about redux which will provide common store so state could be updated but I dont want to use that.
I have also read about lifting state up but in my case i have more nested components so I dont want to do that as well.
So suggest me some way to do it?
I have solved the problem by using react context api. It is simple wrap your top level component with provider and define some veriable and access that variable in any component.
The app I am building has a root client object that affects all of the subsequent views of the app. I want the user to be able to change clients and have all of the tabs reset, i.e. popToTop() and update the client appropriately.
I have a TabBarIOS component with 4 tabs, each tab is a NavigatorIOS component that manages the subsequent ListView components. How can I force all the NavigatorIOS components to popToTop() and re-render based on a client change?
Thanks in advance.
One simple approach would be to use an event emitter. Create an event emitter and pass it down to the component that owns the NavigatorIOS components. The owner can use the ref prop of each NavigatorIOS component to get a reference to each navigator.
The owner then can add a listener to the event emitter, and call popToTop() on each navigator when the listener is invoked. Then, it's just a matter of emitting the event when appropriate.