React Native Picker With Code Examples 2
React Native Picker is a popular component that is used to create a dropdown menu or a picker in a React Native app. This component allows users to choose or select an item from a list of options or categories that are displayed in the picker.
In this article, we will explore the React Native Picker component in more detail and provide you with some code examples that you can use to create your own picker.
Getting Started With React Native Picker
First, you need to create a new React Native app, or if you already have one, open it in an IDE like Visual Studio Code or Sublime Text.
Next, you should import the Picker component from the react-native library and create a new component that will render the picker.
import React, {useState} from 'react';
import {View, Picker} from 'react-native';
const MyPicker = () => {
const [selectedValue, setSelectedValue] = useState('java');
return (
<View>
<Picker
selectedValue={selectedValue}
onValueChange={(itemValue, itemIndex) => setSelectedValue(itemValue)}>
<Picker.Item label="Java" value="java" />
<Picker.Item label="JavaScript" value="js" />
<Picker.Item label="Python" value="python" />
<Picker.Item label="C++" value="cpp" />
<Picker.Item label="Node.js" value="node" />
</Picker>
</View>
);
};
export default MyPicker;
In the above code, we have imported the Picker component from the react-native library and created a new functional component called MyPicker. Inside this component, we have used the useState hook to initialize the selectedValue state to 'java'.
We have used the Picker component to render the picker with five list items. Each item has a label that is displayed in the picker, and a value that is returned when the item is selected.
We have also used the onValueChange prop to update the selectedValue state whenever an item is selected in the picker.
Rendering the Picker Component
Now that you have created a new component that renders the Picker component, you can render this component in your app.
import React from 'react';
import {SafeAreaView, StyleSheet} from 'react-native';
import MyPicker from './components/MyPicker';
const App = () => {
return (
<SafeAreaView style={styles.container}>
<MyPicker />
</SafeAreaView>
);
};
const styles = StyleSheet.create({
container: {
flex: 1,
alignItems: 'center',
justifyContent: 'center',
},
});
export default App;
In the above code, we have created a new functional component called App. Inside this component, we have used the SafeAreaView component from react-native to create a safe area for your app's content.
We have also imported and rendered the MyPicker component that we created earlier in this article.
Testing the Picker Component
To test the Picker component, you can run your app on a simulator or a physical device.
When the app runs, you should see a picker with five items displayed on the screen. You can click on the picker to display the options, and then select an option to update the selected value state.
Conclusion
The React Native Picker component is an easy and straightforward way to allow users to select an option from a list of items in your app. You can use this component to create a dropdown menu or a picker in your React Native app.
In this article, we have provided you with some code examples that you can use to create your own picker in React Native. We hope that this article has been helpful to you and that you have learned something new about React Native Picker component.
React Native Picker is a highly useful and flexible component that can be used in a variety of ways in React Native applications. With the ability to render a dropdown menu or picker, it provides an easy way for users to interact with your app and make selections from a list of options.
Adding More Functionality to React Native Picker
While the basic setup of React Native Picker is simple, you can add more functionality to make it more useful for your particular application.
For example, you can add dynamic options to the picker based on user input or data returned from an API. You can also provide different styling options to the Picker component using CSS and add animations to provide more feedback to the user.
import React, {useState} from 'react';
import {View, StyleSheet, Picker, Text} from 'react-native';
const MyPicker = () => {
const [selectedValue, setSelectedValue] = useState('java');
const [category, setCategory] = useState('frontend');
const frontend = [
{ label: 'JavaScript', value: 'js' },
{ label: 'React', value: 'react' },
{ label: 'Vue.js', value: 'vue' },
];
const backend = [
{ label: 'Node.js', value: 'node' },
{ label: 'Python', value: 'python' },
{ label: 'Ruby', value: 'ruby' },
];
const options = (category === 'frontend') ? frontend : backend;
return (
<View>
<Picker
selectedValue={selectedValue}
onValueChange={(itemValue, itemIndex) => setSelectedValue(itemValue)}>
{options.map(option => (
<Picker.Item label={option.label} value={option.value} />
))}
</Picker>
<Text style={styles.label}>Select Category:</Text>
<View style={styles.category}>
<Text
style={(category === 'frontend') ? styles.active : null}
onPress={() => setCategory('frontend')}>
Frontend
</Text>
<Text
style={(category === 'backend') ? styles.active : null}
onPress={() => setCategory('backend')}>
Backend
</Text>
</View>
</View>
);
};
const styles = StyleSheet.create({
label: {
fontWeight: 'bold',
marginTop: 10,
},
category: {
flexDirection: 'row',
justifyContent: 'space-between',
},
active: {
fontWeight: 'bold',
}
});
export default MyPicker;
In the code above, we have added the ability to select different category options based on user input. We have used two categories – frontend and backend – and based on the currently selected category, we have provided different options for the picker.
We have also added different styling options to the component, and included a label and category menu to make it easier for users to interact with the component.
In summary, you can add additional features and functionality to the React Native Picker, making it more versatile and intuitive for users to interact with.
Popular questions
- What is React Native Picker used for?
- React Native Picker is used to create a dropdown menu or picker in a React Native app. It allows users to choose or select an item from a list of options or categories that are displayed in the picker.
- How do you create a React Native Picker component?
- To create a React Native Picker component, you need to import the Picker component from the react-native library, and use the component to render a list of options or categories. You can then use the onValueChange prop to update the selected value when a user selects an item.
- Can you add more functionality to the React Native Picker component?
- Yes, you can add more functionality to the React Native Picker component. For example, you can add dynamic options to the picker based on user input or data returned from an API. You can also add different styling options using CSS and add animations to provide more feedback to the user.
- How do you add different categories to the React Native Picker component?
- To add different categories to the React Native Picker component, you can create lists of options for each category, and then use conditional rendering to display the options based on the currently selected category.
- How do you update the selected value in the React Native Picker component?
- You can update the selected value in the React Native Picker component using the onValueChange prop. This prop takes a function that is called whenever a user selects an item from the picker. The function should update the state of the selected value to reflect the new selection.
Tag
Pickerz.
