注意使用箭头函数，否则无法改变data里值

			drawPie() {
				const echarts = require('echarts');
				let myChart = echarts.init(document.getElementById('chartpie'));
				myChart.setOption({
					color:['#039be5','#ff00ff','#6baf47','#f3c654','#80dfb6'],
					tooltip: {
					        trigger: 'item',
					        formatter: '{b}: ({d}%)',
					    },
					    series: [
					        {
					            name: 'Access source',
					            type: 'pie',
					            radius: ['50%', '95%'],
					            avoidLabelOverlap: false,
					            label: {
									show:true,
									position:'inner',
									formatter:'{d}%'
								},
					            emphasis: {
					                label: {
					                    show: true,
					                    fontSize: '12',
										color:'#fff'
					                }
					            },
					            labelLine: {
					                show: true
					            },
					            data: [
									{value: 43, name:'Strategic investors'},
									{value: 12, name:'Launch PAD sale'},
									{value: 16, name: 'Foundation ECO reward pool'},
					                {value: 10, name: 'Treasury'},
									{value: 6, name: 'Founders and team'},
					            ],
					        }
					    ]
				});
				myChart.on('mouseover',(params) => {
					this.titCur = params.data.name
				})
			}