this setstate is not a function in react native

1Make sure you use arrow functions to correctly bind 'this'
2
3 handlePageChange = (page) => {
4        this.setState({ currentPage: page });
5    }
6
7This will give you 'this.setstate is not a function'
8
9 handlePageChange(page){
10        this.setState({ currentPage: page });
11    }

1constructor(props) {
2    super(props)
3    this.onClick = this.onClick.bind(this)
4}
5
6 onClick () {
7     this.setState({...})
8 }
9