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IOS/大作业：Statistics in Time统计软件/Icon/Settings.imageset/Contents.json

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+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "Settings-25.png",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "Settings-50.png",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "Settings-100.png",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

IOS/大作业：Statistics in Time统计软件/Icon/SettingsFilled.imageset/Contents.json

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+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "Settings Filled-25.png",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "Settings Filled-50.png",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "Settings Filled-100.png",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

IOS/大作业：Statistics in Time统计软件/Icon/Trends.imageset/Contents.json

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+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "Combo Chart-25.png",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "Combo Chart-50.png",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "Combo Chart-100.png",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

IOS/大作业：Statistics in Time统计软件/Icon/TrendsFilled.imageset/Contents.json

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+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "Combo Chart Filled-25.png",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "Combo Chart Filled-50.png",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "Combo Chart Filled-100.png",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

IOS/大作业：Statistics in Time统计软件/Statistics in Time统计软件.md

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+# Statistics in Time统计软件
+
+学习了这么多的基础知识，我们还没有完整的开发一款app！本部分我们将开始Statistics in Time软件的开发，这是一款可以在手机上进行简易数据分析的demo。值得注意的是，这一个Task是开放内容，并没有标准的答案。我们仅将演示完成基本功能的代码，至于更对的样式与搭配则需要你自己来完成。欢迎大家将新奇的想法与精美的UI进行搭配，组合出专属于自己的掌上数据分析app！期待着大家更好的作品！
+
+
+
+## 功能分析
+
+日常生活中，我们可能常常需要简易观察一下一些数据之间的统计信息，例如：近几周的菜价是否有不寻常的波动；考试成绩是否符合正态分布；近几天的气温数据是否具有相关性等等等等.....
+
+不管你是数据分析师，是学生/老师，还是财务工作人员，统计都无处不在！由于每个人对统计的需求不尽相同，我们难以做出一款适用于每个人的统计软件，但是我们可以只根据自己的日常需求自己写一个简易的Statistics in Time在手。以我自己为例，我希望能够设计一款随手就能查看一组数据之间的各种信息，其中可以包括这组数据的均值、方差、峰度、偏度等等（如果能可视化分析当然就更赞了！）此外，我还希望能够设计出一款自带日历功能的app，这样就能随时提醒我需要做的事情。因此需求如下：
+
+- 统计功能
+- 日历功能
+
+下面，我们将围绕这两个功能进行实现。
+
+
+
+## 准备工作
+
+**Step 1：**创建新工程文件Statistics in Time
+
+<img src="/Users/mac/Desktop/iOSdev/大作业：Statistics in Time统计软件/img/1.png" alt="1" style="zoom: 33%;" />
+
+**Step 2：**删除storyboard，并设置代码启动。
+
+**Step3：**`菜单栏`----`file`----`new`----`file`（快捷键command+N）
+
+<img src="/Users/mac/Desktop/iOSdev/大作业：Statistics in Time统计软件/img/2.png" alt="2" style="zoom: 33%;" />
+
+<img src="/Users/mac/Desktop/iOSdev/大作业：Statistics in Time统计软件/img/3.png" alt="3" style="zoom:33%;" />
+
+<img src="/Users/mac/Desktop/iOSdev/大作业：Statistics in Time统计软件/img/4.png" alt="4" style="zoom:33%;" />
+
+**Step4：**同理创建StatisticsViewController.swift与CalendarViewController，继承自UIViewController。
+
+<img src="/Users/mac/Desktop/iOSdev/大作业：Statistics in Time统计软件/img/5.png" alt="5" style="zoom: 33%;" />
+
+**Step 5：**创建navigationViewController，继承自UINavigationViewController。
+
+**Step 6：**删除`ViewController.swift`，并在`SceneDelegate.swfit`中更换如下代码：
+
+```swift
+    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
+        guard let _ = (scene as? UIWindowScene) else { return }
+        guard let windowScene = (scene as? UIWindowScene) else {return}
+        window = UIWindow(frame:windowScene.coordinateSpace.bounds)
+        window?.windowScene = windowScene
+        window?.backgroundColor = UIColor.white
+        window?.rootViewController = MainViewController()
+        window?.makeKeyAndVisible()
+    }
+```
+
+**Step 7：**将本课件Icon中四个文件夹拖拽至Assets.xcassets中，并在MainViewController内添加如下代码：
+
+```swift
+import UIKit
+class MainViewController: UITabBarController {
+
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        self.tabBar.tintColor = UIColor(red: 0/255, green:169/255, blue:169/255, alpha:1)
+        addNormalTabbar()
+    }
+    
+    func addNormalTabbar() {
+        //初始化
+        let updateVc = StatisticsViewController.init()
+        updateVc.view.backgroundColor = UIColor.red
+        setupOneChildViewController(title: "统计", image: "Trends", seletedImage: "TrendsFilled", controller: StatisticsViewController.init())
+        setupOneChildViewController(title: "概要", image: "Settings", seletedImage: "SettingsFilled", controller: ProfileViewController.init())
+    }
+    fileprivate func  setupOneChildViewController(title: String,image: String,seletedImage: String,controller: UIViewController){
+        controller.tabBarItem.title = title
+        controller.title = title
+        //这里设置背景色 是每一个vc设置的都一样
+        controller.view.backgroundColor = UIColor.white
+        controller.tabBarItem.image = UIImage.init(named: image)
+        controller.tabBarItem.selectedImage = UIImage.init(named: seletedImage)
+        let naviController = navigationViewController.init(rootViewController: controller)
+        addChild(naviController)
+    }
+}
+```
+
+**Step 8：**运行代码，即可见下图
+
+<img src="/Users/mac/Desktop/iOSdev/大作业：Statistics in Time统计软件/img/6.png" alt="6" style="zoom:50%;" />
+
+
+
+
+
+现在的页面仍然是一片空白，我们接下来的任务便是在`统计`页面填充入统计功能，在`概要`界面加入日历功能。
+
+
+
+## Cocopods与第三方库
+
+你可以在 [Awesome-swift](https://github.com/matteocrippa/awesome-swift) 查看Swift的一些优秀的第三方库，这些第三方库不仅可以帮我们简化功能实现（加入引导页，实现跑马灯功能等），也可以美化UI（更改Button外观、加入动画过渡），甚至帮助我们高效利用内存/缓存等。
+
+本部分我们需要添加两个第三方库：
+
+- **[ SigmaSwiftStatistics](https://github.com/evgenyneu/SigmaSwiftStatistics)**：数学计算第三方库
+- [Charts](https://github.com/danielgindi/Charts)：数据可视化
+- **[ CVCalendar](https://github.com/CVCalendar/CVCalendar)**：实现日历功能
+
+添加过程如下：
+
+1. 关闭Xcode，打开终端（Terminal），切换到Statistics in Time工程文件目录下
+
+   ```bash
+   cd Downloads/code/Statistics\ in\ Time/
+   ```
+
+2. Cocopods初始化：
+
+   ```bash
+   pod init
+   ```
+
+3. 打开Podfile文件
+
+   ```swift
+   open Podfile
+   ```
+
+4. 添加如下命令：
+
+   ```swift
+   pod 'CVCalendar', '~> 1.7.0'
+   pod 'Charts'
+   pod 'TinyConstraints'
+   pod 'SigmaSwiftStatistics', '~> 9.0'
+   ```
+
+5. 关闭文本编辑器，回到终端，输入
+
+   ```swift
+   pod update
+   ```
+
+6. 等待片刻即可完成。
+
+## 统计功能实现
+
+在Statistics in Time目录下，打开`Statistics in Time.xcworkspace`，并添加如下代码
+
+```swift
+import SigmaSwiftStatistics
+```
+
+该计算库提供了一种科学计算的方法，然而这仅仅是通过数组进行计算。常规情况下我们一般用Textfiled来读取用户输入的内容，这是一种String格式。如何将String转化为Array？除了传统的算法外，我们能否想出一种办法利用Swift的特性进行转化？这里给出一种参考方式：
+
+```swift
+    @objc func btnClick(_:  Any){
+        let inputNumber:String = String(textField.text!)
+        let fullNumberArr = inputNumber.split{$0 == " "}.map(String.init)
+        let arr = changeArray(textArray: fullNumberArr)
+        resultLabel.text = String(Sigma.average(arr) ?? 0)
+    }
+    
+    func changeArray(textArray: [String]) -> [Double] {
+        textArray.compactMap { Double($0) }
+    }
+```
+
+这一段代码的含义是什么？
+
+
+
+## 统计功能参考代码
+
+```swift
+import UIKit
+import SigmaSwiftStatistics
+import TinyConstraints
+
+class StatisticsViewController: UIViewController,UITextFieldDelegate {
+    let textField = UITextField(frame: CGRect(x: 120, y: 140, width: 180, height: 40))
+    let alertLabel = UILabel(frame: CGRect(x: 20, y: 140, width: 90, height: 40))
+    var resultLabel = UILabel(frame: CGRect(x: 175, y: 200, width: 200, height: 40))
+    var averLabel = UILabel(frame: CGRect(x: 105, y: 200, width: 90, height: 40))
+    var resultLabel2 = UILabel(frame: CGRect(x: 175, y: 240, width: 200, height: 40))
+    var centralMomentLabel = UILabel(frame:CGRect(x: 105, y: 240, width: 90, height: 40))
+    var resultLabel3 = UILabel(frame: CGRect(x: 175, y: 280, width: 200, height: 40))
+    var variancePopulationLabel = UILabel(frame: CGRect(x: 105, y: 280, width: 90, height: 40))
+    var resultLabel4 = UILabel(frame:CGRect(x: 175, y: 320, width: 200, height: 40))
+    var coefficientOfVariationLabel = UILabel(frame: CGRect(x: 95, y: 320, width: 90, height: 40))
+    var resultLabel5 = UILabel(frame:CGRect(x: 175, y: 360, width: 200, height: 40))
+    var kurtosisA = UILabel(frame: CGRect(x: 105, y: 360, width: 90, height: 40))
+    var resultLabel6 = UILabel(frame:CGRect(x: 175, y: 400, width: 200, height: 40))
+    var kurtosisB = UILabel(frame: CGRect(x: 105, y: 400, width: 90, height: 40))
+    var resultLabel7 = UILabel(frame:CGRect(x: 175, y: 440, width: 200, height: 40))
+    var skewnessLabel = UILabel(frame: CGRect(x: 105, y: 440, width: 90, height: 40))
+    
+    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
+        textField.resignFirstResponder()
+        return true
+    }
+    
+    override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
+        textField.resignFirstResponder()
+    }
+    
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        
+        textField.borderStyle = .roundedRect
+        textField.textColor = UIColor.black
+        alertLabel.text = "数据输入："
+        alertLabel.textColor = UIColor.black
+        resultLabel.text = " "
+        resultLabel2.text = " "
+        resultLabel3.text = " "
+        resultLabel4.text = " "
+        resultLabel5.text = " "
+        resultLabel6.text = " "
+        resultLabel7.text = " "
+        averLabel.text = "平均值："
+        centralMomentLabel.text = "标准误："
+        variancePopulationLabel.text = "Var值："
+        coefficientOfVariationLabel.text = "变异系数："
+        kurtosisA.text = "峰度A："
+        kurtosisB.text = "峰度B："
+        skewnessLabel.text = "偏度："
+        
+        
+        
+        let btn:UIButton=UIButton.init(frame: CGRect(x:310,y:140, width:100,height:40))//创建按钮，并设置位置，宽度、高度
+        btn.setTitle("开始统计", for: UIControl.State.normal)//设置按钮上的文字
+        btn.backgroundColor = UIColor.systemBlue
+        btn.addTarget(self, action:#selector(btnClick(_:)), for: UIControl.Event.touchDown)//为按钮添加touchDown事件(按下)
+        self.view.addSubview(btn)//将标签添加到View中
+        self.view.addSubview(textField)
+        self.view.addSubview(alertLabel)
+        self.view.addSubview(resultLabel)
+        self.view.addSubview(averLabel)
+        self.view.addSubview(centralMomentLabel)
+        self.view.addSubview(resultLabel2)
+        self.view.addSubview(variancePopulationLabel)
+        self.view.addSubview(resultLabel3)
+        self.view.addSubview(coefficientOfVariationLabel)
+        self.view.addSubview(resultLabel4)
+        self.view.addSubview(resultLabel5)
+        self.view.addSubview(resultLabel6)
+        self.view.addSubview(kurtosisA)
+        self.view.addSubview(kurtosisB)
+        self.view.addSubview(resultLabel7)
+        self.view.addSubview(skewnessLabel)
+        //textField.delegate = self
+    }
+    
+    
+    @objc func btnClick(_:  Any){
+        let inputNumber:String = String(textField.text!)
+        let fullNumberArr = inputNumber.split{$0 == " "}.map(String.init)
+        let arr = changeArray(textArray: fullNumberArr)
+        print(Sigma.average(arr) ?? 0)
+        resultLabel.text = String(Sigma.average(arr) ?? 0)
+        resultLabel2.text = String(Sigma.standardErrorOfTheMean(arr) ?? 0)
+        resultLabel3.text = String(Sigma.varianceSample(arr) ?? 0)
+        resultLabel4.text = String(Sigma.coefficientOfVariationSample(arr) ?? 0)
+        resultLabel5.text = String(Sigma.kurtosisA(arr) ?? 0)
+        resultLabel6.text = String(Sigma.kurtosisB(arr) ?? 0)
+        resultLabel7.text = String(Sigma.skewnessA(arr) ?? 0)
+    }
+    
+    func changeArray(textArray: [String]) -> [Double] {
+        textArray.compactMap { Double($0) }
+    }
+}
+```
+
+## 日历功能的实现
+
+在Statistics in Time目录下，打开`Statistics in Time.xcworkspace`，并添加如下代码
+
+```swift
+import CVCalendar
+```
+
+这是Github上一个优秀的第三方库，可以实现日历相关功能。不过，在实现功能之前，我们还需要手动添加一个文件：ColorsConfig，后面我们将在此文件中进行参数设置，参考代码如下：
+
+```swift
+import UIKit
+
+struct ColorsConfig {
+    static let selectedText = UIColor.white
+    static let text = UIColor.black
+    static let textDisabled = UIColor.purple
+    static let selectionBackground = UIColor(red: 1, green: 0.647, blue: 0, alpha: 1.0)
+    static let sundayText = UIColor(red: 1.0, green: 0.2, blue: 0.2, alpha: 1.0)
+    static let sundayTextDisabled = UIColor(red: 1.0, green: 0.6, blue: 0.6, alpha: 1.0)
+    static let sundaySelectionBackground = sundayText
+}
+```
+
+
+
+## 日历功能代码
+
+```swift
+import UIKit
+import CVCalendar
+
+class ProfileViewController: UIViewController {
+    private var menuView:CVCalendarMenuView!
+    private var calendarView:CVCalendarView!
+    private var monthLabel:UILabel! = UILabel.init(frame: CGRect(x:157,y:80, width:120,height:60))
+    private var daysOutSwitch:UISwitch!
+    private var removeCircleAndDot = UIButton.self
+    private var randomNumberOfDotMarkersForDay = [Int]()
+    private var shouldShowDaysOut = true
+    private var animationFinished = true
+    private var selectedDay: DayView!
+    private var currentCalendar: Calendar?
+    
+    override func awakeFromNib() {
+        let timeZoneBias = 480 // (UTC+08:00)
+        currentCalendar = Calendar(identifier: .gregorian)
+        currentCalendar?.locale = Locale(identifier: "fr_FR")
+        if let timeZone = TimeZone(secondsFromGMT: -timeZoneBias * 60) {
+            currentCalendar?.timeZone = timeZone
+        }
+    }
+    
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        monthLabel = UILabel.init(frame: CGRect(x: 157, y: 100, width: 104, height: 20))
+        monthLabel.text = "my Calendar"
+        if let currentCalendar = currentCalendar {
+            monthLabel.text = CVDate(date: Date(), calendar: currentCalendar).globalDescription
+        }
+        randomizeDotMarkers()
+        self.menuView = CVCalendarMenuView(frame: CGRect(x: 10, y: 130, width: 394, height: 15))
+
+        // CVCalendarView initialization with frame
+        self.calendarView = CVCalendarView(frame: CGRect(x: 10, y: 145, width: 394, height: 310))
+        self.calendarView.calendarAppearanceDelegate = self
+        self.calendarView.animatorDelegate = self
+
+        // Menu delegate [Required]
+        self.menuView.menuViewDelegate = self
+
+        // Calendar delegate [Required]
+        self.calendarView.calendarDelegate = self
+        
+        calendarView.backgroundColor = UIColor.tertiarySystemGroupedBackground
+        self.view.addSubview(calendarView)
+        self.view.addSubview(menuView)
+        self.view.addSubview(monthLabel)
+    }
+    override func viewDidLayoutSubviews() {
+        super.viewDidLayoutSubviews()
+        calendarView.commitCalendarViewUpdate()
+        menuView.commitMenuViewUpdate()
+    }
+    private func randomizeDotMarkers() {
+        randomNumberOfDotMarkersForDay = [Int]()
+        for _ in 0...31 {
+            randomNumberOfDotMarkersForDay.append(Int(arc4random_uniform(3) + 1))
+        }
+    }
+    
+}
+
+extension ProfileViewController: CVCalendarViewDelegate, CVCalendarMenuViewDelegate {
+    // MARK: Required methods
+    func presentationMode() -> CalendarMode { return .monthView }
+    func firstWeekday() -> Weekday { return .sunday }
+    // MARK: Optional methods
+    
+    func calendar() -> Calendar? { return currentCalendar }
+    func dayOfWeekTextColor(by weekday: Weekday) -> UIColor {
+        return weekday == .sunday ? UIColor(red: 1.0, green: 0, blue: 0, alpha: 1.0) : UIColor.white
+    }
+    func shouldShowWeekdaysOut() -> Bool { return shouldShowDaysOut }
+    // Defaults to true
+    func shouldAnimateResizing() -> Bool { return true }
+    private func shouldSelectDayView(dayView: DayView) -> Bool {
+        return arc4random_uniform(3) == 0 ? true : false
+    }
+    
+    func shouldAutoSelectDayOnMonthChange() -> Bool { return false }
+    func didSelectDayView(_ dayView: CVCalendarDayView, animationDidFinish: Bool) {
+        selectedDay = dayView
+    }
+    
+    func shouldSelectRange() -> Bool { return true }
+    func didSelectRange(from startDayView: DayView, to endDayView: DayView) {
+        print("RANGE SELECTED: \(startDayView.date.commonDescription) to \(endDayView.date.commonDescription)")
+    }
+    func presentedDateUpdated(_ date: CVDate) {
+        if monthLabel.text != date.globalDescription && self.animationFinished {
+            let updatedMonthLabel = UILabel()
+            updatedMonthLabel.textColor = monthLabel.textColor
+            updatedMonthLabel.font = monthLabel.font
+            updatedMonthLabel.textAlignment = .center
+            updatedMonthLabel.text = date.globalDescription
+            updatedMonthLabel.sizeToFit()
+            updatedMonthLabel.alpha = 0
+            updatedMonthLabel.center = self.monthLabel.center
+            
+            let offset = CGFloat(48)
+            updatedMonthLabel.transform = CGAffineTransform(translationX: 0, y: offset)
+            updatedMonthLabel.transform = CGAffineTransform(scaleX: 1, y: 0.1)
+            
+            UIView.animate(withDuration: 0.35, delay: 0, options: UIView.AnimationOptions.curveEaseIn, animations: {
+                self.animationFinished = false
+                self.monthLabel.transform = CGAffineTransform(translationX: 0, y: -offset)
+                self.monthLabel.transform = CGAffineTransform(scaleX: 1, y: 0.1)
+                self.monthLabel.alpha = 0
+                
+                updatedMonthLabel.alpha = 1
+                updatedMonthLabel.transform = CGAffineTransform.identity
+                
+            }) { _ in
+                
+                self.animationFinished = true
+                self.monthLabel.frame = updatedMonthLabel.frame
+                self.monthLabel.text = updatedMonthLabel.text
+                self.monthLabel.transform = CGAffineTransform.identity
+                self.monthLabel.alpha = 1
+                updatedMonthLabel.removeFromSuperview()
+            }
+            
+            self.view.insertSubview(updatedMonthLabel, aboveSubview: self.monthLabel)
+        }
+    }
+    
+    func topMarker(shouldDisplayOnDayView dayView: CVCalendarDayView) -> Bool { return true }
+    
+    func shouldHideTopMarkerOnPresentedView() -> Bool {
+        return true
+    }
+    
+    func weekdaySymbolType() -> WeekdaySymbolType { return .short }
+    
+    func selectionViewPath() -> ((CGRect) -> (UIBezierPath)) {
+        return { UIBezierPath(rect: CGRect(x: 0, y: 0, width: $0.width, height: $0.height)) }
+    }
+    
+    func shouldShowCustomSingleSelection() -> Bool { return false }
+    
+    func preliminaryView(viewOnDayView dayView: DayView) -> UIView {
+        let circleView = CVAuxiliaryView(dayView: dayView, rect: dayView.frame, shape: CVShape.circle)
+        circleView.fillColor = .colorFromCode(0xCCCCCC)
+        return circleView
+    }
+    
+    func preliminaryView(shouldDisplayOnDayView dayView: DayView) -> Bool {
+        if (dayView.isCurrentDay) {
+            return true
+        }
+        return false
+    }
+    
+    func supplementaryView(viewOnDayView dayView: DayView) -> UIView {
+        
+        dayView.setNeedsLayout()
+        dayView.layoutIfNeeded()
+        
+        let π = Double.pi
+        
+        let ringLayer = CAShapeLayer()
+        let ringLineWidth: CGFloat = 4.0
+        let ringLineColour = UIColor.blue
+        
+        let newView = UIView(frame: dayView.frame)
+        
+        let diameter = (min(newView.bounds.width, newView.bounds.height))
+        let radius = diameter / 2.0 - ringLineWidth
+        
+        newView.layer.addSublayer(ringLayer)
+        
+        ringLayer.fillColor = nil
+        ringLayer.lineWidth = ringLineWidth
+        ringLayer.strokeColor = ringLineColour.cgColor
+        
+        let centrePoint = CGPoint(x: newView.bounds.width/2.0, y: newView.bounds.height/2.0)
+        let startAngle = CGFloat(-π/2.0)
+        let endAngle = CGFloat(π * 2.0) + startAngle
+        let ringPath = UIBezierPath(arcCenter: centrePoint,
+                                    radius: radius,
+                                    startAngle: startAngle,
+                                    endAngle: endAngle,
+                                    clockwise: true)
+        
+        ringLayer.path = ringPath.cgPath
+        ringLayer.frame = newView.layer.bounds
+        
+        return newView
+    }
+    
+    func supplementaryView(shouldDisplayOnDayView dayView: DayView) -> Bool {
+        guard let currentCalendar = currentCalendar else { return false }
+        
+        let components = Manager.componentsForDate(Foundation.Date(), calendar: currentCalendar)
+        
+        /* For consistency, always show supplementaryView on the 3rd, 13th and 23rd of the current month/year.  This is to check that these expected calendar days are "circled". There was a bug that was circling the wrong dates. A fix was put in for #408 #411.
+         
+         Other month and years show random days being circled as was done previously in the Demo code.
+         */
+        var shouldDisplay = false
+        if dayView.date.year == components.year &&
+            dayView.date.month == components.month {
+            
+            if (dayView.date.day == 3 || dayView.date.day == 13 || dayView.date.day == 23)  {
+                print("Circle should appear on " + dayView.date.commonDescription)
+                shouldDisplay = true
+            }
+        } else if (Int(arc4random_uniform(3)) == 1) {
+            shouldDisplay = true
+        }
+        
+        return shouldDisplay
+    }
+    
+    func dayOfWeekTextColor() -> UIColor { return .white }
+    
+    func dayOfWeekBackGroundColor() -> UIColor { return .orange }
+    
+    func disableScrollingBeforeDate() -> Date { return Date() }
+    
+    func maxSelectableRange() -> Int { return 14 }
+    
+    func earliestSelectableDate() -> Date { return Date() }
+    
+    func latestSelectableDate() -> Date {
+        var dayComponents = DateComponents()
+        dayComponents.day = 70
+        let calendar = Calendar(identifier: .gregorian)
+        if let lastDate = calendar.date(byAdding: dayComponents, to: Date()) {
+            return lastDate
+        }
+        
+        return Date()
+    }
+}
+
+
+// MARK: - CVCalendarViewAppearanceDelegate
+
+extension ProfileViewController: CVCalendarViewAppearanceDelegate {
+    
+    func dayLabelWeekdayDisabledColor() -> UIColor { return .lightGray }
+    
+    func dayLabelPresentWeekdayInitallyBold() -> Bool { return false }
+    
+    func spaceBetweenDayViews() -> CGFloat { return 0 }
+    
+    func dayLabelFont(by weekDay: Weekday, status: CVStatus, present: CVPresent) -> UIFont { return UIFont.systemFont(ofSize: 14) }
+    
+    func dayLabelColor(by weekDay: Weekday, status: CVStatus, present: CVPresent) -> UIColor? {
+        switch (weekDay, status, present) {
+        case (_, .selected, _), (_, .highlighted, _): return ColorsConfig.selectedText
+        case (.sunday, .in, _): return ColorsConfig.sundayText
+        case (.sunday, _, _): return ColorsConfig.sundayTextDisabled
+        case (_, .in, _): return ColorsConfig.text
+        default: return ColorsConfig.textDisabled
+        }
+    }
+    
+    func dayLabelBackgroundColor(by weekDay: Weekday, status: CVStatus, present: CVPresent) -> UIColor? {
+        switch (weekDay, status, present) {
+        case (.sunday, .selected, _), (.sunday, .highlighted, _): return ColorsConfig.sundaySelectionBackground
+        case (_, .selected, _), (_, .highlighted, _): return ColorsConfig.selectionBackground
+        default: return nil
+        }
+    }
+}
+// MARK: - IB Actions
+
+// MARK: - Convenience API Demo
+extension ProfileViewController {
+    func toggleMonthViewWithMonthOffset(offset: Int) {
+        guard let currentCalendar = currentCalendar else { return }
+        var components = Manager.componentsForDate(Date(), calendar: currentCalendar) // from today
+        components.month! += offset
+        let resultDate = currentCalendar.date(from: components)!   
+        self.calendarView.toggleViewWithDate(resultDate)
+    }
+    
+    func didShowNextMonthView(_ date: Date) {
+        guard let currentCalendar = currentCalendar else { return }
+        let components = Manager.componentsForDate(date, calendar: currentCalendar) // from today
+        print("Showing Month: \(components.month!)")
+    }
+    
+    
+    func didShowPreviousMonthView(_ date: Date) {
+        guard let currentCalendar = currentCalendar else { return }
+        let components = Manager.componentsForDate(date, calendar: currentCalendar) // from today        
+        print("Showing Month: \(components.month!)")
+    }
+
+    func didShowNextWeekView(from startDayView: DayView, to endDayView: DayView) {
+        print("Showing Week: from \(startDayView.date.day) to \(endDayView.date.day)")
+    }
+  
+    func didShowPreviousWeekView(from startDayView: DayView, to endDayView: DayView) {
+        print("Showing Week: from \(startDayView.date.day) to \(endDayView.date.day)")
+    }
+    
+}
+```
+
+
+
+## 思考与优化
+
+1. 在统计功能部分，我们在内存加载时添加了大量控件，这会造成系统极度卡顿，如何优化上文代码？如何优化整个系统的性能？如何在协议中拓展textFiled的代理功能？（你可以参考`懒加载`相关概念，并试着利用数组来代替大量而重复的控件代码。）
+2. 在日历部分，我们并没有将所有的功能都放到主函数中，而是采用了`协议`进行拓展，这是面向协议编程的特性之一。请你试着思考：采取这种方式有什么优点？为什么我们在加载控件时采用private？这对整个程序有什么帮助？如何美化整个Calendar页面？（你可以参考一些精美的UI设计，并在Github相关专题上寻找优化程序的答案）
+