// 关于银河湾

galaxy/galaxy/Classes/Modules/Mine（我的）/AboutYH/C/YHDetailViewController.swift

@@ -19,6 +19,29 @@ class YHDetailViewController: YHBaseViewController {
         return headView
     }()
     
+    lazy var navBar: YHCustomNavigationBar = {
+        let bar = YHCustomNavigationBar.navBar()
+        bar.backgroundColor = .clear
+        bar.backButton.setImage(UIImage(named: "back_icon_white"), for: .normal)
+        bar.backBlock = {
+            [weak self] in
+            guard let self = self else { return }
+            self.navigationController?.popViewController(animated: true)
+        }
+        return bar
+    }()
+    
+    lazy var navView:UIView = {
+        let view = UIView()
+        view.backgroundColor = .clear
+        view.addSubview(self.navBar)
+        self.navBar.snp.makeConstraints { make in
+            make.left.right.bottom.equalToSuperview()
+            make.height.equalTo(k_Height_NavContentBar)
+        }
+        return view
+    }()
+    
     override func viewDidLoad() {
         super.viewDidLoad()
         setView()
@@ -62,6 +85,7 @@ extension YHDetailViewController: UITableViewDelegate, UITableViewDataSource {
 
 extension YHDetailViewController {
     func setView() {
+        gk_navigationBar.isHidden = true
         view.backgroundColor = .white
         tableView = {
             let tableView = UITableView(frame: .zero, style: .grouped)
@@ -81,6 +105,11 @@ extension YHDetailViewController {
         tableView.snp.makeConstraints { make in
             make.top.bottom.left.right.equalToSuperview()
         }
+        view.addSubview(self.navView)
+        self.navView.snp.makeConstraints { make in
+            make.left.right.top.equalToSuperview()
+            make.height.equalTo(k_Height_NavigationtBarAndStatuBar)
+        }
     }
     
     func loadData() {
@@ -92,3 +121,25 @@ extension YHDetailViewController {
         }
     }
 }
+
+extension YHDetailViewController: UIScrollViewDelegate {
+    func scrollViewDidScroll(_ scrollView: UIScrollView) {
+        
+        var percent = scrollView.contentOffset.y/k_Height_NavigationtBarAndStatuBar
+        if percent < 0.0 {
+            percent = 0.0
+        } else if percent > 1.0 {
+            percent = 1.0
+        }
+        navView.backgroundColor = UIColor(hex: 0xFFFFFF, alpha: percent)
+        
+        if percent >= 0.5 {
+            navBar.backButton.setImage(UIImage(named: "back_icon"), for: .normal)
+            navBar.title = "关于银河湾"
+            
+        } else {
+            navBar.backButton.setImage(UIImage(named: "back_icon_white"), for: .normal)
+            navBar.title = ""
+        }
+    }
+}