uniapp使用echarts问题

uniapp 真机调试echarts option的axisPointer: {
                    type: 'cross',
snap:true,
                    label: {
backgroundColor: '#6a7985',
                        formatter:function(params) {
                            console.log(params);
                            if(params.axisDimension === 'y'){
                                return params.value.toFixed(2) + '%';
                            }else{
                                return params.value;
                            }
                            
                        }
                    }
                }
里面的formatter:function函数不起作用，但是h5可以，请问是什么问题呢，有人可以帮下忙吗