// plan

galaxy/galaxy/Classes/Modules/Plan(方案)/C/YHPlanPolicyDetailViewController.swift

@@ -17,6 +17,7 @@ class YHPlanPolicyImageInfo {
 
 class YHPlanPolicyDetailViewController: YHBaseViewController {
    
+    var firstAppear: Bool = true
     var arr: [YHPlanCaseModel] = [] {
         didSet {
             imgs.removeAll()
@@ -25,6 +26,7 @@ class YHPlanPolicyDetailViewController: YHBaseViewController {
                 model.model = item
                 imgs.append(model)
             }
+            self.collectionView.reloadData()
         }
     }
     
@@ -32,17 +34,18 @@ class YHPlanPolicyDetailViewController: YHBaseViewController {
     
     var imgs: [YHPlanPolicyImageInfo] = []
     
-//    lazy var scrollView: UIScrollView =  {
-//        let v = UIScrollView(frame: .zero)
-//        return v
-//    }()
+    lazy var bgImgView: UIImageView =  {
+        let v = UIImageView()
+        v.clipsToBounds = true
+        return v
+    }()
     
     lazy var collectionView: UICollectionView = {
         let layout = UICollectionViewFlowLayout()
         layout.minimumInteritemSpacing = 0.0
         layout.minimumLineSpacing = 0.0
         layout.scrollDirection = .horizontal
-        let collectView = UICollectionView(frame: .zero, collectionViewLayout: layout)
+        let collectView = UICollectionView(frame: CGRect(x: 0, y: k_Height_NavigationtBarAndStatuBar+24.0, width: KScreenWidth, height: 520), collectionViewLayout: layout)
         collectView.backgroundColor = .clear
         collectView.delegate = self
         collectView.dataSource = self
@@ -51,6 +54,12 @@ class YHPlanPolicyDetailViewController: YHBaseViewController {
         return collectView
     }()
     
+    lazy var blurView: UIVisualEffectView = {
+        let blurEffect = UIBlurEffect(style: .light) // 可以选择不同的模糊样式
+        let blurEffectView = UIVisualEffectView(effect: blurEffect)
+        return blurEffectView
+    }()
+    
     lazy var shareBtn: UIButton = {
         let btn = UIButton()
         btn.backgroundColor = .white
@@ -69,9 +78,18 @@ class YHPlanPolicyDetailViewController: YHBaseViewController {
         gk_navTitle = "\(currentIndex+1)/\(arr.count)"
         gk_navTitleColor = .white
         view.backgroundColor = .init(hex: 0x000000, alpha: 1.0)
+        view.addSubview(bgImgView)
+        view.addSubview(blurView)
         view.addSubview(collectionView)
         view.addSubview(shareBtn)
         
+        bgImgView.snp.makeConstraints { make in
+            make.edges.equalToSuperview()
+        }
+        
+        blurView.snp.makeConstraints { make in
+            make.edges.equalToSuperview()
+        }
         collectionView.snp.makeConstraints { make in
             make.left.right.equalToSuperview()
             make.top.equalTo(k_Height_NavigationtBarAndStatuBar+24.0)
@@ -84,8 +102,26 @@ class YHPlanPolicyDetailViewController: YHBaseViewController {
             make.height.equalTo(46)
             make.top.equalTo(collectionView.snp.bottom).offset(32)
         }
-        collectionView.setContentOffset(CGPoint(x: KScreenWidth * Double(currentIndex), y: 0.0), animated: true)
+        
         loadImgs()
+        showBgImage(index: currentIndex)
+    }
+    
+    func showBgImage(index: Int) {
+        if 0 <= index, index < arr.count {
+            let model = arr[index]
+            if let url = URL(string: model.img_url) {
+                bgImgView.kf.setImage(with: url)
+            }
+        }
+    }
+    
+    override func viewWillAppear(_ animated: Bool) {
+        super.viewWillAppear(animated)
+        if firstAppear {
+            collectionView.scrollToItem(at: IndexPath(row: currentIndex, section: 0), at: .top, animated: false)
+            firstAppear = false
+        }
     }
     
     func loadImgs() {
@@ -123,7 +159,7 @@ extension YHPlanPolicyDetailViewController: UICollectionViewDelegate, UICollecti
     // 返回每个单元格的大小
     func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
         
-        return CGSize(width: KScreenWidth, height: collectionView.height)
+        return CGSize(width: KScreenWidth, height: 520)
     }
     
     // 返回自定义单元格
@@ -150,6 +186,7 @@ extension YHPlanPolicyDetailViewController: UIScrollViewDelegate {
     func scrollViewDidScroll(_ scrollView: UIScrollView) {
         let currentIndex = Int(scrollView.contentOffset.x/KScreenWidth)
         gk_navTitle = "\(currentIndex+1)/\(arr.count)"
+        showBgImage(index: currentIndex)
 
     }
 }