问TypeError:无法读取未定义的属性“”imageList“”

EN

import React, { Component } from 'react';
import card1 from '../graphics/card1.jpg';
import card2 from '../graphics/card2.jpg';
import card3 from '../graphics/card3.png';
import card4 from '../graphics/card4.jpg';
import card5 from '../graphics/card5.png';
import card6 from '../graphics/card6.png';

class BoardGame extends Component {
    state = { 
        imageList: [card1,card2,card3,card4,card5,card6],
        board: this.chooseImages(2,2)
    }

//choose random images at half size of board
        let data=[];
        let selectedImage;
        let imageList = this.state.imageList;
        const numOfPics=(rows*columns)/2;
        for(let i=0;i<numOfPics;i++){
           selectedImage = imageList[Math.floor(Math.random()*imageList.length)]
            data.push(selectedImage,selectedImage);
        }
        data=this.shuffleImageList(data);
        return data;
    }

let imageList = this.state.imageList;