[Swift通天遁地]一、超级工具-(16)使用JTAppleCalendar制作美观的日历

★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★
➤微信公众号：山青咏芝（shanqingyongzhi）
➤博客园地址：山青咏芝（https://www.cnblogs.com/strengthen/）
➤GitHub地址：https://github.com/strengthen/LeetCode
➤原文地址：https://www.cnblogs.com/strengthen/p/10173424.html 
➤如果链接不是山青咏芝的博客园地址，则可能是爬取作者的文章。
➤原文已修改更新！强烈建议点击原文地址阅读！支持作者！支持原创！
★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★

目录：[Swift]通天遁地Swift

本文将演示使用JTAppleCalendar制作美观的日历。

首先确保在项目中已经安装了所需的第三方库。

点击【Podfile】,查看安装配置文件。

platform :ios, '12.0'
use_frameworks!

target 'DemoApp' do
    source 'https://github.com/CocoaPods/Specs.git'
    pod 'JTAppleCalendar', '~> 6.0'
end

根据配置文件中的相关配置，安装第三方库

然后点击打开【DemoApp.xcworkspace】项目文件。

在项目文件夹【DemoApp】上鼠标右键，弹出右键菜单：

【New File】->【Cocoa Touch Class】->【Next】->
【Class】：CellView ,类名。

【Subclass of】：JTAppleCalendar ，父类

【Language】：Swift

->【Next】->【Create】

在项目导航区，打开刚刚创建的代码文件【CellView.swift】

//引入第三方类库
import JTAppleCalendar

class CellView: JTAppleDayCellView {
    
    @IBOutlet var dayLabel: UILabel!

    @IBOutlet var selectedView: UIView!
}

在项目文件夹【DemoApp】上鼠标右键，弹出右键菜单：

【New File】->【View】视图->【Next】->【Save As】：CellView ->【Create】

点击【CellView.xib】，设置相关属性

<?xml version="1.0" encoding="UTF-8"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="11201" systemVersion="16B2657" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES">
    <dependencies>
        <deployment identifier="iOS"/>
        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="11161"/>
        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
    </dependencies>
    <objects>
        <placeholder placeholderIdentifier="IBFilesOwner" id="-1" userLabel="File's Owner"/>
        <placeholder placeholderIdentifier="IBFirstResponder" id="-2" customClass="UIResponder"/>
        <view contentMode="scaleToFill" id="iN0-l3-epB" customClass="CellView" customModule="DemoApp" customModuleProvider="target">
            <rect key="frame" x="0.0" y="0.0" width="160" height="160"/>
            <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
            <subviews>
                <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="WDR-tm-CCJ">
                    <color key="backgroundColor" red="0.80000000000000004" green="0.59999999999999998" blue="0.0" alpha="1" colorSpace="calibratedRGB"/>
                    <constraints>
                        <constraint firstAttribute="width" constant="40" id="6XG-r3-HC7"/>
                        <constraint firstAttribute="height" constant="40" id="JOI-ha-pr3"/>
                    </constraints>
                </view>
                <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Label" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="qQL-PP-1hg">
                    <fontDescription key="fontDescription" type="system" pointSize="14"/>
                    <color key="textColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
                    <nil key="highlightedColor"/>
                </label>
            </subviews>
            <color key="backgroundColor" red="0.2274509804" green="0.15686274510000001" blue="0.29803921570000003" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
            <constraints>
                <constraint firstItem="qQL-PP-1hg" firstAttribute="centerX" secondItem="iN0-l3-epB" secondAttribute="centerX" id="1dS-Ke-SwV"/>
                <constraint firstItem="qQL-PP-1hg" firstAttribute="centerY" secondItem="iN0-l3-epB" secondAttribute="centerY" id="8zP-vN-Rfy"/>
                <constraint firstItem="WDR-tm-CCJ" firstAttribute="centerX" secondItem="iN0-l3-epB" secondAttribute="centerX" id="aIf-16-vU3"/>
                <constraint firstItem="WDR-tm-CCJ" firstAttribute="centerY" secondItem="iN0-l3-epB" secondAttribute="centerY" id="mhp-tS-eFs"/>
            </constraints>
            <freeformSimulatedSizeMetrics key="simulatedDestinationMetrics"/>
            <connections>
                <outlet property="dayLabel" destination="qQL-PP-1hg" id="EzH-lh-Czg"/>
                <outlet property="selectedView" destination="WDR-tm-CCJ" id="RxZ-fx-mpA"/>
            </connections>
            <point key="canvasLocation" x="-87" y="-205"/>
        </view>
    </objects>
</document>

 在项目导航区，打开视图控制器的代码文件【ViewController.swift】

import UIKit
//在当前的类文件中，引入已经安装的第三方类库
import JTAppleCalendar

//添加需要使用到的相关协议
class ViewController: UIViewController, JTAppleCalendarViewDataSource, JTAppleCalendarViewDelegate {
    
    @IBOutlet var calendarView: JTAppleCalendarView!
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
        //设置数据源为当前的视图控制器对象
        calendarView.dataSource = self
        //设置代理对象为当前的视图控制器对象
        calendarView.delegate = self
        //要使用自定义的日历视图，需要注册日历中的日期数字单元格的故事版文件
        calendarView.registerCellViewXib(file: "CellView")
        //设置日期数字单元格的间距
        calendarView.cellInset = CGPoint(x: 0, y: 0)
        
        //在日历中允许选择多个日期
        calendarView.allowsMultipleSelection  = true
        //允许进行日期区域的选择
        calendarView.rangeSelectionWillBeUsed = true
        
        //将日历视图添加到当前视图控制器的根视图
        self.view.addSubview(calendarView)
    }
    
    //添加一个代理方法，用来监听日历中的数据单元格即将显示的事件
    func calendar(_ calendar: JTAppleCalendarView, willDisplayCell cell: JTAppleDayCellView, date: Date, cellState: CellState)
    {
        //获得即将显示的单元格对象，并转换成自定义的单元格类
        let myCustomCell = cell as! CellView
        //设置单元格中的标签的文字内容
        myCustomCell.dayLabel.text = cellState.text
        
        //当日历显示的日期为当前月份时
        if cellState.dateBelongsTo == .thisMonth
        {
            //设置数字标签的字体颜色为浅灰色
            myCustomCell.dayLabel.textColor = UIColor(red: 236/255,
                                                      green: 234/255, 
                                                      blue: 237/255, 
                                                      alpha: 1.0)
        }
        else
        {
            //不是当前的月份时，设置另外一种颜色
            myCustomCell.dayLabel.textColor = UIColor(red: 87/255, 
                                                      green: 72/255,
                                                      blue: 101/255,
                                                      alpha: 1.0)
        }
        
        //处理日期单元格被选择的事件
        handleCellSelection(view: cell, cellState: cellState)
    }
    
    //添加一个方法，用来响应日期数字单元格被选择的事件
    func handleCellSelection(view: JTAppleDayCellView?, cellState: CellState)
    {
        //获得被选择的日期数字单元格
        guard let myCustomCell = view as? CellView  else
        {
            return
        }
        //当单元格被选择时
        if cellState.isSelected
        {
            //设置单元格的选择标识视图的圆角半径为20
            myCustomCell.selectedView.layer.cornerRadius =  20
            //并设置视图的显示状态为真
            myCustomCell.selectedView.isHidden = false
        }
        else
        {
            //当单元格不处选择状态时，隐藏该单元格的标识视图
            myCustomCell.selectedView.isHidden = true
        }
        //同时在控制台输出单元格的日期
        print("Date:(cellState.date)")
    }
    
    //添加一个代理方法，用来配置日历的相关参数
    func configureCalendar(_ calendar: JTAppleCalendarView) -> ConfigurationParameters
    {
        //初始化一个日期格式对象
        let formatter = DateFormatter()
        //设置日期的格式
        formatter.dateFormat = "yyyy MM dd"
        
        //初始化两个日期对象
        //分别标识日历的起始日期
        let startDate = formatter.date(from: "2018 12 26")!
        //分别标识日历的结束日期
        let endDate = Date()
        
        //初始化一个配置参数对象
        let parameters = ConfigurationParameters(startDate: startDate,//起始日期
                                                 endDate: endDate,//结束日期
                                                 numberOfRows: 6,//日历行数
                                                 calendar: Calendar.current,//日历类别
                                                 generateInDates: .forAllMonths,//过去日期
                                                 generateOutDates: .tillEndOfGrid,//将来日期
                                                 firstDayOfWeek: .sunday)//每周第一天
        //返回的日历配置参数对象
        return parameters
    }
    
    //添加一个代理方法，用来监听某个日期被选择时的事件
    func calendar(_ calendar: JTAppleCalendarView, didSelectDate date: Date, cell: JTAppleDayCellView?, cellState: CellState)
    {
        handleCellSelection(view: cell, cellState: cellState)
    }
    
    //添加一个代理方法，用来监听某个日期取消选择时的事件
    func calendar(_ calendar: JTAppleCalendarView, didDeselectDate date: Date, cell: JTAppleDayCellView?, cellState: CellState)
    {
        handleCellSelection(view: cell, cellState: cellState)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}