uCharts 设置Y轴位置没有效果呀，求大佬看看

showLineA(canvasId) {

            canvasObj[canvasId] = new uCharts({  
                $this: _self,  
                canvasId: canvasId,  
                type: 'area',  
                fontSize: 11,  
                padding:[15,15,0,15],  
                legend:{  
                    show:false,  
                    padding:5,  
                    lineHeight:11,  
                    margin:5,  
                },  
                dataLabel: false,  
                dataPointShape: false,  
                background: '#FFFFFF',  
                pixelRatio: _self.pixelRatio,  
                categories: ['2012', '2013', '2014', '2015', '2016', '2017'],  
                series: [{  
                    name: '成交量A',  
                    data: [100, 80, 95, 150, 112, 132],  
                    color: '#298AFB',  
                    index:1,  
                },{  
                    name: '成交量b',  
                    data: [ 132, 112, 150, 95, 80,101],  
                    color: '#ff0000',  
                    index:0,  
                }],  
                animation: true,  
                enableScroll: true, //开启图表拖拽功能  
                xAxis: {  
                    disableGrid: false,  
                    type: 'grid',  
                    gridType: 'dash',  
                    itemCount: 5,   
                    scrollShow: true,   
                    scrollAlign: 'right',  
                    boundaryGap:'justify',  
                    //scrollBackgroundColor:'#F7F7FF',//可不填写，配合enableScroll图表拖拽功能使用，X轴滚动条背景颜色,默认为 #EFEBEF  
                    //scrollColor:'#DEE7F7',//可不填写，配合enableScroll图表拖拽功能使用，X轴滚动条颜色,默认为 #A6A6A6  
                },  
                yAxis: {  
                    //disabled:true  
                    gridType: 'dash',  
                    splitNumber: 8,  
                    min: 10,  
                    max: 180,  
                    data:[{  
                        position: 'left'  
                    }, {  
                        position: 'right'  
                    }],  
                    format: (val) => {  
                        return val.toFixed(0) + '元'  
                    } //如不写此方法，Y轴刻度默认保留两位小数  
                },  
                width: _self.cWidth * _self.pixelRatio,  
                height: _self.cHeight * _self.pixelRatio,  
                extra: {  
                    area:{  
                        opacity:0.2,  
                        addLine:true,  
                        width:1,  
                        gradient:true  
                    }  

                },  
            });  

        },