Based on ISEmojiView. Only works on iOS for now. If you want to add an Android version, Pull Requests are welcome.

• yarn add react-native-emoji-keyboard or npm install --save react-native-emoji-keyboard
• react-native link react-native-emoji-keyboard
• In XCode, TO you your project settings and in the "General" tab. Click on the "+" in the "Linked Frameworks and Libraries" section. Locate and add "RNEmojiKeyboardFramework.framework"
• In XCode, go to your build settings and set "Always Embed Swift Standard Libraries" to "YES"
• Clean the Project (Product -> Clean)
• Build and run your project

<View style={styles.container}>
    <Text>{this.state.emojis.join('')}</Text>
    <EmojiKeyboard onEmojiPicked={e => this.setState({emojis: this.state.emojis.concat(e)})}
                   onEmojiRemoved={e => this.setState({emojis: this.state.emojis.slice(0, -1)})}
                   showDeleteButton={this.state.emojis.length > 0}/>
</View>