powerfun-unity/Assets/Scripts/Scenes/Ride/Scripts/NearByFactory.cs

using Assets.Scenes.Ride.Scripts.Model;
using System.Linq;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

namespace Assets.Scenes.Ride.Scripts
{
    public class NearByFactory : BaseListFactory
    {
        private Text Title { get; set; }
        private Text OnlineUserNum { get; set; }
        protected override void Awake()
        {
            scroll = transform.Find("NearByScrollView").gameObject;
            if (scroll != null)
            {
                UIManager.AddEvent(scroll, UnityEngine.EventSystems.EventTriggerType.EndDrag, OnEndDrag);
            }
            parent = scroll.transform.Find("Viewport/Content");
            cyclingController = FindObjectOfType<CyclingController>();
            playerController = FindObjectOfType<PlayerController>();
#if UNITY_IOS || UNITY_ANDROID
            nearByItem = Resources.Load<GameObject>("UI/Prefab/Ride/Mobile/NearbyItem");
            nearByMajorItem = Resources.Load<GameObject>("UI/Prefab/Ride/Mobile/NearbyMajorItem");
#else
            nearByItem = Resources.Load<GameObject>("UI/Prefab/Ride/NearbyItem");
            nearByMajorItem = Resources.Load<GameObject>("UI/Prefab/Ride/NearbyMajorItem");
#endif
            Title = transform.Find("Title").GetComponent<Text>();
            OnlineUserNum = transform.Find("NearByView/OnlineUserNum").GetComponent<Text>();
            pageSize = 7;//开启无线下拉
        }
        protected override void CreateList()
        {
            OnlineUserNum.text = " "+  MapUDPService.GetNearRiderCount().ToString();
            LayoutRebuilder.ForceRebuildLayoutImmediate(OnlineUserNum.rectTransform);
            var nearList = MapUDPService.GetNearRiderData(pageIndex, pageSize, new double[] { playerController.Currentlatlong.x, playerController.Currentlatlong.y });
            var mod = MapUDPService.GetNearRiderCount() % pageSize;
            var pages = MapUDPService.GetNearRiderCount() / pageSize;
            totalPages = mod > 0 ? pages + 1 : pages;
            //删除
            var currentNearList = FindObjectsOfType<NearByItemScript>();
            foreach (var item in currentNearList)
            {
                var e = nearList.Where(c => c.Id == item.UserId).FirstOrDefault();
                if (e == null)
                {
                    //item.transform.gameObject.SetActive(false);
                    item.Dispose();
                    bufferSize--;
                }
            }

            for (int i = 0; i < nearList.Count(); i++)
            {
                Create(nearList[i], currentNearList);
            }
        }
       

        private void Create(NearRiderModel item, NearByItemScript[] rankingList)
        {
            //var rankingList = FindObjectsOfType<NearByItemScript>();
            var nearByItemscript = rankingList.Where(c => c.UserId == item.Id).FirstOrDefault();
            //如果当前有这个用户则更新没有则创建并setslibingindex
            if (nearByItemscript == null)
            {
                //创建
                if (bufferSize < pageSize)
                {
                    //情况一：还有足够的buffer,直接创建
                    GameObject prefabItem = item.IsSelf ? nearByMajorItem : nearByItem;
                    GameObject newObj = (GameObject)Instantiate(prefabItem, parent);
                    nearByItemscript = newObj.GetComponent<NearByItemScript>();
                    bufferSize++;
                }
                else
                {
                    //情况二：没有足够的buffer，找到要被淘汰的buffer()最后一名
                    nearByItemscript = rankingList.OrderByDescending(c => c.distance).FirstOrDefault();
                }
            }

            nearByItemscript.setUserId(item.Id);
            nearByItemscript.setName(item.Name);
            nearByItemscript.setRatio(item.KGWeight + "W/KG");
            nearByItemscript.setSpeed(item.Speed.ToString() + "KM/H");
            if (cyclingController.currentPlayer.UserId == item.Id)
            {
                nearByItemscript.setHead(item.Headimage);
            }
#if !(UNITY_IOS || UNITY_ANDROID)
            nearByItemscript.setCountry(cyclingController.GetCountryImageByName(item.Country));
#endif
            nearByItemscript.setDistance(item.Near.ToString() + "KM");
            nearByItemscript.transform.SetSiblingIndex((int)item.Near);
        }
    }
}