BMKLocationViewDisplayParam *displayParam = [[BMKLocationViewDisplayParam alloc]init];
displayParam.isRotateAngleValid = true;//跟随态旋转角度是否生效
displayParam.isAccuracyCircleShow = false;//精度圈是否显示
displayParam.locationViewImgName= @"icon";//定位图标名称
displayParam.locationViewOffsetX = 0;//定位偏移量(经度)
displayParam.locationViewOffsetY = 0;//定位偏移量(纬度)
[_mapView updateLocationViewWithParam:displayParam];