How to catch ios device button press in react native?

You could create a native module as per FuzzyTree's comment however if you want something that's ready out of the box you could use https://github.com/IFours/react-native-volume-slider and make it hidden. The onValueChange callback is called upon the iOS device volume controls being changed.

Another idea could be to look into the aforementioned module and just take out what you need to form a new module and publish it for the benefit of everyone.

You can use react-native-system-setting package with addVolumeListener listener. Something like this

componentDidMount() { // listen the volume changing this.volumeListener = SystemSetting.addVolumeListener(data => { // your action here }); }