添加 首页 信息预加载功能

galaxy/galaxy/Classes/Modules/Home(首页)/C/YHHomePageViewController.swift

@@ -418,3 +418,20 @@ extension YHHomePageViewController {
         }
     }
 }
+
+extension YHHomePageViewController {
+    func scrollViewDidScroll(_ scrollView: UIScrollView) {
+        let itemNumber = viewModel.preloadItemIndex // 你想要检查的item的位置，例如10
+        // 首先，计算IndexPath
+        let section = 0 // 假设只有一个section
+        let itemIndex = itemNumber - 1 // UICollectionView的item索引从0开始
+        let indexPathToCheck = IndexPath(item: itemIndex, section: section)
+        // 然后，检查这个IndexPath是否在当前可见的item列表中
+        if homeCollectView.indexPathsForVisibleItems.contains(indexPathToCheck) {
+            printLog("第\(itemNumber)个item已经展示出来了")
+            loadMoreData()
+        } else {
+            printLog("\(itemNumber)目标不在范围内")
+        }
+    }
+}

galaxy/galaxy/Classes/Modules/Home(首页)/VM/YHHomePageViewModel.swift

@@ -15,11 +15,16 @@ class YHHomePageViewModel : YHBaseViewModel {
     var banners: [YHBannerModel]?
     var classify: [YHHomeClassifyModel]?
     var hkList: [YHHKEventModel]?
+    
     //首页相关参数
     private var curPageIndex : Int = 1
     private var page_Size : Int = 50
+    var preloadItemIndex : Int = 25
+    private var isRequestHomeNewsDataFlag : Bool  = false
+    
     var totalCount : Int = 0
     var hasMoreForHomeNews : Bool = true
+    
     // 搜索
     let searchPageSize: Int = 20
 }
@@ -50,6 +55,22 @@ extension YHHomePageViewModel {
      firstPageFlag  true - 首次  false - 更多
      */
     func getHomeNewsList(firstPageFlag : Bool,callBackBlock:@escaping (_ success: Bool,_ error:YHErrorModel?)->()) {
+        
+        if firstPageFlag == false {
+            guard hasMoreForHomeNews == true  else {
+                printLog("无更多数据可请求")
+                return
+            }
+        }
+        
+        guard isRequestHomeNewsDataFlag == false else {
+            printLog("正在进行请求")
+            return
+        }
+        
+        isRequestHomeNewsDataFlag = true
+        
+        
         var params: [String : Any] = ["page": curPageIndex,
                                       "page_size": page_Size]
         if firstPageFlag {
@@ -62,6 +83,8 @@ extension YHHomePageViewModel {
         let strUrl = YHBaseUrlManager.shared.curURL() + YHAllApiName.Common.consultApi
         let _ = YHNetRequest.getRequest(url: strUrl,params: params) { [weak self] json, code in
             guard let self = self else { return }
+            
+            self.isRequestHomeNewsDataFlag = false
             //1. json字符串 转 对象
             if json.code == 200 {
                 let dic = json.data
@@ -85,6 +108,8 @@ extension YHHomePageViewModel {
                     self.arrHomeNewsData?.append(contentsOf: result.data)
                 }
                 
+                
+                
                 if result.data.count >= page_Size {
                     if let count = self.arrHomeNewsData?.count {
                         if count >= self.totalCount {
@@ -97,14 +122,15 @@ extension YHHomePageViewModel {
                     self.hasMoreForHomeNews = false
                 }
                 
+                preloadItemIndex = 25 + (curPageIndex - 1) * page_Size
+                
                 callBackBlock(true, nil)
             } else {
-//                self.arrHomeNewsData = []
                 let error : YHErrorModel = YHErrorModel(errorCode:Int32(json.code), errorMsg: json.msg)
                 callBackBlock(false, error)
             }
         } failBlock: { err in
-//            self.arrHomeNewsData = []
+            self.isRequestHomeNewsDataFlag =  false
             callBackBlock(false,err)
         }
     }

galaxy/galaxy/Classes/Modules/IntelligentService(服务中心)/C/YHServiceCenterMainViewController.swift

@@ -98,6 +98,13 @@ class YHServiceCenterMainViewController: YHBaseViewController {
         noDataView.clickShowBtnClickBlock = {
             YHServiceOrderAlertView.show()
         }
+        
+        
+        noDataView.isHidden = false
+        nameBgImageView.isHidden = true
+        segmentedView.isHidden = true
+        listContainerView.isHidden = true
+        orderButton.isHidden = true
     }
     
     override func viewWillAppear(_ animated: Bool) {