From 4d375076e1264630081bac7f671793df4c9c17f8 Mon Sep 17 00:00:00 2001 From: Yurk <67189406+realYurkOfGitHub@users.noreply.github.com> Date: Fri, 12 Nov 2021 19:22:05 +0800 Subject: [PATCH] =?UTF-8?q?Delete=20Statistics=20in=20Time=E7=BB=9F?= =?UTF-8?q?=E8=AE=A1=E8=BD=AF=E4=BB=B6.md?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../Statistics in Time统计软件.md | 617 ------------------ 1 file changed, 617 deletions(-) delete mode 100644 IOS/大作业：Statistics in Time统计软件/Statistics in Time统计软件.md diff --git a/IOS/大作业：Statistics in Time统计软件/Statistics in Time统计软件.md b/IOS/大作业：Statistics in Time统计软件/Statistics in Time统计软件.md deleted file mode 100644 index 0262a28..0000000 --- a/IOS/大作业：Statistics in Time统计软件/Statistics in Time统计软件.md +++ /dev/null @@ -1,617 +0,0 @@ -# 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 - -1 - -**Step 2：**删除storyboard，并设置代码启动。 - -**Step3：**`菜单栏`----`file`----`new`----`file`（快捷键command+N） - -2 - -3 - -4 - -**Step4：**同理创建StatisticsViewController.swift与CalendarViewController，继承自UIViewController。 - -5 - -**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 - -6 - - - - - -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, 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） -