JAVASCRIPT

this.setstate is not a function

Make sure you use arrow functions to correctly bind 'this'

 handlePageChange = (page) => {
        this.setState({ currentPage: page });
    }

This will give you 'this.setstate is not a function'

 handlePageChange(page){
        this.setState({ currentPage: page });
    }

this.setstate is not a function in react native

constructor(props) {
    super(props)
    this.onClick = this.onClick.bind(this)
}

 onClick () {
     this.setState({...})
 }

TypeError: this.setstate is not a function

Make sure you use arrow functions to correctly bind 'this'

 handlePageChange = (page) => {
        this.setState({ currentPage: page });
    }

This will give you 'this.setstate is not a function'

 handlePageChange(page){
        this.setState({ currentPage: page });
    }
    
    

this.setstate is not a function

VK.api('users.get',{fields: 'photo_50'},function(data){
    if(data.response){
        this.setState({ //the error happens here
            FirstName: data.response[0].first_name
        });
        console.info(this.state.FirstName);
    }

}.bind(this));