react-native-measure-text
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Measure text height without laying it out.
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Markdown
# React Native Measure Text
Measure text height without laying it out.
[](https://badge.fury.io/js/react-native-measure-text)
## Installation
### Automatic installation
`$ yarn add react-native-measure-text`
`$ react-native link react-native-measure-text`
### Manual installation
#### iOS
1. In XCode, in the project navigator, right click `Libraries` ➜ `Add Files to [your project's name]`
2. Go to `node_modules` ➜ `react-native-measure-text` and add `RNMeasureText.xcodeproj`
3. In XCode, in the project navigator, select your project. Add `libRNMeasureText.a` to your project's `Build Phases` ➜ `Link Binary With Libraries`
4. Run your project (`Cmd+R`)<
#### Android
1. Open up `android/app/src/main/java/[...]/MainActivity.java`
- Add `import io.github.airamrguez.RNMeasureTextPackage;` to the imports at the top of the file
- Add `new RNMeasureTextPackage()` to the list returned by the `getPackages()` method
2. Append the following lines to `android/settings.gradle`:
```
include ':react-native-measure-text'
project(':react-native-measure-text').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-measure-text/android')
```
3. Insert the following lines inside the dependencies block in `android/app/build.gradle`:
```
compile project(':react-native-measure-text')
```
## Usage
```javascript
import MeasureText from 'react-native-measure-text';
const texts = [
'This is an example',
'This is the second line'
];
const width = 100;
const fontSize = 15;
class Test extends Component {
state = {
heights: [],
}
async componentDidMount() {
const heights = await MeasureText.measure({(
texts, /* texts to measure */
width, /* container width */
fontSize
);
this.setState({ heights });
}
render() {
const { heights } = this.state;
return (
<View>
{texts.map((text, i) => (
<Text
key={`text-${i}`}
style={{
width,
fontSize,
height: heights[i],
}}
>
{text}
</Text>
));
);}
</View>
}
}
```