diff --git a/SwiftSideslipLikeQQ.xcodeproj/project.xcworkspace/xcuserdata/JohnLui.xcuserdatad/UserInterfaceState.xcuserstate b/SwiftSideslipLikeQQ.xcodeproj/project.xcworkspace/xcuserdata/JohnLui.xcuserdatad/UserInterfaceState.xcuserstate
index bfaec2e..3986ed7 100644
Binary files a/SwiftSideslipLikeQQ.xcodeproj/project.xcworkspace/xcuserdata/JohnLui.xcuserdatad/UserInterfaceState.xcuserstate and b/SwiftSideslipLikeQQ.xcodeproj/project.xcworkspace/xcuserdata/JohnLui.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/SwiftSideslipLikeQQ/AppDelegate.swift b/SwiftSideslipLikeQQ/AppDelegate.swift
index 5257f48..cac3f88 100644
--- a/SwiftSideslipLikeQQ/AppDelegate.swift
+++ b/SwiftSideslipLikeQQ/AppDelegate.swift
@@ -20,11 +20,10 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
         // 改变 StatusBar 颜色
         application.statusBarStyle = UIStatusBarStyle.LightContent
         
-        // 改变 navigation bar 的背景色
+        // 改变 navigation bar 的背景色及前景色
         let navigationBarAppearace = UINavigationBar.appearance()
         navigationBarAppearace.translucent = false
         navigationBarAppearace.barTintColor = UIColor(hex: 0x25b6ed)
-        
         navigationBarAppearace.tintColor = UIColor.whiteColor()
         navigationBarAppearace.titleTextAttributes = [NSForegroundColorAttributeName:UIColor.whiteColor()]
         
diff --git a/SwiftSideslipLikeQQ/Common.swift b/SwiftSideslipLikeQQ/Common.swift
index 15391fa..3b52ffa 100644
--- a/SwiftSideslipLikeQQ/Common.swift
+++ b/SwiftSideslipLikeQQ/Common.swift
@@ -9,6 +9,7 @@
 import UIKit
 
 struct Common {
+    // Swift 中， static let 才是真正可靠好用的单例模式
     static let screenWidth = UIScreen.mainScreen().applicationFrame.maxX
     static let screenHeight = UIScreen.mainScreen().applicationFrame.maxY
     static let rootViewController = UIApplication.sharedApplication().keyWindow?.rootViewController as! ViewController
diff --git a/SwiftSideslipLikeQQ/HomeViewController.swift b/SwiftSideslipLikeQQ/HomeViewController.swift
index 3948530..36ed70f 100644
--- a/SwiftSideslipLikeQQ/HomeViewController.swift
+++ b/SwiftSideslipLikeQQ/HomeViewController.swift
@@ -8,6 +8,7 @@
 
 import UIKit
 
+// 主页
 class HomeViewController: UIViewController {
     
     var titleOfOtherPages = ""
diff --git a/SwiftSideslipLikeQQ/LeftViewController.swift b/SwiftSideslipLikeQQ/LeftViewController.swift
index bf8b99b..94667cb 100644
--- a/SwiftSideslipLikeQQ/LeftViewController.swift
+++ b/SwiftSideslipLikeQQ/LeftViewController.swift
@@ -8,6 +8,7 @@
 
 import UIKit
 
+// 侧滑菜单 View Controller
 class LeftViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
     
     let titlesDictionary = ["开通会员", "QQ钱包", "网上营业厅", "个性装扮", "我的收藏", "我的相册", "我的文件"]
@@ -33,6 +34,7 @@ class LeftViewController: UIViewController, UITableViewDelegate, UITableViewData
         // Dispose of any resources that can be recreated.
     }
     
+    // 处理点击事件
     func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
         let viewController = Common.rootViewController
         viewController.homeViewController.titleOfOtherPages = titlesDictionary[indexPath.row]
diff --git a/SwiftSideslipLikeQQ/MainTabBarController.swift b/SwiftSideslipLikeQQ/MainTabBarController.swift
index b6d3264..1e0977f 100644
--- a/SwiftSideslipLikeQQ/MainTabBarController.swift
+++ b/SwiftSideslipLikeQQ/MainTabBarController.swift
@@ -8,6 +8,7 @@
 
 import UIKit
 
+// TabBar Controller，主页所有内容的父容器
 class MainTabBarController: UITabBarController {
 
     override func viewDidLoad() {
@@ -21,11 +22,13 @@ class MainTabBarController: UITabBarController {
         // Dispose of any resources that can be recreated.
     }
     
+    // 覆写了 TabBar 的点击效果
     override func tabBar(tabBar: UITabBar, didSelectItem item: UITabBarItem) {
         switch item.tag {
         case 0:
             Common.contactsVC.view.removeFromSuperview()
         case 1:
+            // 这里为了省事采用了简单的 addSubView 方案，真正项目中应该采用 TabBar Controller 自带的 self.viewControllers 方案
             Common.rootViewController.mainTabBarController.view.addSubview(Common.contactsVC.view)
             Common.rootViewController.mainTabBarController.view.bringSubviewToFront(Common.rootViewController.mainTabBarController.tabBar)
         case 2:
diff --git a/SwiftSideslipLikeQQ/OtherPageViewController.swift b/SwiftSideslipLikeQQ/OtherPageViewController.swift
index 8243cca..6073fbb 100644
--- a/SwiftSideslipLikeQQ/OtherPageViewController.swift
+++ b/SwiftSideslipLikeQQ/OtherPageViewController.swift
@@ -8,6 +8,7 @@
 
 import UIKit
 
+// 点击侧滑菜单中的条目，主页跳转到的 View Controller
 class OtherPageViewController: UIViewController {
     
     var PageTitle: String! // 从 HomeViewController 传递过来的值