To add a "+" button to a React Native screen, you can use the `Button` component or any touchable component of your choice, such as `TouchableOpacity` or `TouchableHighlight`. If you encounter an error while trying to add a button, please provide more details about the error message or the code you are working on so that I can provide a more specific solution. Here's a general example of how to add a "+" button:
1. Import the necessary components:
```jsx
import React from 'react';
import { View, Button, Text } from 'react-native';
```
2. Create a functional component or class component:
```jsx
function MyComponent() {
// Your component logic here
return (
<View>
{/* Other content of your screen */}
<Button
title="Add +"
onPress={() => {
// Handle the button press here
// This function is called when the button is pressed.
}}
/>
</View>
);
}
export default MyComponent;
```
In the code above, we import the necessary components, create a component called `MyComponent`, and add a `Button` element with the title "Add +" and an `onPress` function to handle what happens when the button is pressed.
If you encounter an error, please provide the specific error message or more details about your code, so I can assist you in resolving it.