swift 日历的制作
制作日历步骤
1.日期数据的处理，这个可以 添加 extension 解决
extension NSDate{
/*
几年几月 这个月的多少天
*/ class func getDaysInMonth( year: Int, month: Int) -> Int{ let calendar = NSCalendar.current let startComps = NSDateComponents() startComps.day = 1 startComps.month = month startComps.year = year let endComps = NSDateComponents() endComps.day = 1 endComps.month = month == 12 ? 1 : month + 1 endComps.year = month == 12 ? year + 1 : year let startDate = calendar.date(from: startComps as DateComponents) let endDate = calendar.date(from:endComps as DateComponents)! let diff = calendar.dateComponents([.day], from: startDate!, to: endDate) return diff.day!; }
/*
几年几月 这个月的第一天是星期几
*/ class func firstWeekdayInMonth(year: Int, month: Int)->Int{ let calender = NSCalendar.current; let startComps = NSDateComponents() startComps.day = 1 startComps.month = month startComps.year = year let startDate = calender.date(from: startComps as DateComponents) let firstWeekday = calender.ordinality(of: .weekday, in: .weekOfMonth, for: startDate!) let week = firstWeekday! - 1; return week ; }
/*
今天是星期几
*/ func dayOfWeek() -> Int { let interval = self.timeIntervalSince1970; let days = Int(interval / 86400);// 24*60*60 return (days - 3) % 7; }
class func getCurrentDay() ->Int { let com = self.getComponents(); return com.day! } class func getCurrentMonth() ->Int { let com = self.getComponents(); return com.month! } class func getCurrentYear() ->Int { let com = self.getComponents(); return com.year! } class func getComponents()->DateComponents{ let calendar = NSCalendar.current; //这里注意 swift要用[,]这样方式写 let com = calendar.dateComponents([.year,.month,.day,.hour,.minute], from:Date()); return com } }
2.视图部分，UI部分，用collectionview 更容易些
protocol CalenderControllerDelegate { func didSelectData(year:Int ,month:Int,day:Int)->Void } class CalenderController: UIViewController ,UICollectionViewDelegate,UICollectionViewDataSource{ var delegate :CalenderControllerDelegate? var collection : UICollectionView! let lastMonthButton = UIButton(); let calenderLabel = UILabel(); let nextMonthButton = UIButton(); var dateArray = ["日","一","二","三","四","五","六"]; let calenderCellId = "calenderCellId"; let dateCellId = "DateCellId"; var currentYear :Int = 2017; var currentMonth :Int = 10; var currentDay :Int = 23; var showYear :Int = 0 var showMonth :Int = 0 var showDay :Int = 0 override func viewDidLoad() { super.viewDidLoad() self.view.backgroundColor = UIColor.white; currentYear = NSDate.getCurrentYear(); currentMonth = NSDate.getCurrentMonth(); currentDay = NSDate.getCurrentDay(); showYear = self.currentYear; showMonth = self.currentMonth; self.addAllViews(); } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() } func addAllViews(){ let frameWidth = self.view.frame.size.width; let frameHeight = self.view.frame.size.height; let itemWidth = frameWidth / 7 - 5; let itemHeight = itemWidth; let layout = UICollectionViewFlowLayout(); layout.sectionInset = UIEdgeInsets.zero; layout.itemSize = CGSize(width:itemWidth,height:itemHeight); layout.minimumLineSpacing = 2; layout.minimumInteritemSpacing = 2; collection = UICollectionView.init(frame:CGRect(x:0,y:0 ,width:frameWidth,height:frameHeight / 1.5), collectionViewLayout: layout); collection.center = self.view.center; collection.delegate = self; collection.dataSource = self; collection.register(DateCell.self, forCellWithReuseIdentifier: dateCellId) collection.register(CalenderCell.self, forCellWithReuseIdentifier: calenderCellId) collection.backgroundColor = UIColor.white; self.view.addSubview(collection); let collOriginY = collection.frame.origin.y; let buttonHeight :CGFloat = 40; let buttonWidth = frameWidth / 3.0 lastMonthButton.frame = CGRect(x:0,y:collOriginY - buttonHeight,width:buttonWidth,height:buttonHeight); lastMonthButton.setTitle("<<上月", for: .normal); lastMonthButton.setTitleColor(UIColor.black, for: .normal); lastMonthButton.addTarget(self, action: #selector(CalenderController.lastMonthButtonAction), for: .touchUpInside) self.view.addSubview(lastMonthButton); calenderLabel.frame = CGRect(x:buttonWidth ,y:lastMonthButton.frame.origin.y,width:buttonWidth,height:buttonHeight); calenderLabel.textAlignment = .center; calenderLabel.font = UIFont.systemFont(ofSize: 22); calenderLabel.backgroundColor = UIColor(red: 41/255, green: 160/255, blue: 230/255, alpha: 1); self.view.addSubview(calenderLabel); calenderLabel.font = UIFont.systemFont(ofSize: 13); calenderLabel.text = String.init(format: "%d 年 %d 月 ", currentYear,currentMonth) nextMonthButton.frame = CGRect(x:buttonWidth * 2,y:lastMonthButton.frame.origin.y,width:buttonWidth,height:buttonHeight); nextMonthButton.setTitle("下月>>", for: .normal); nextMonthButton.setTitleColor(UIColor.black, for: .normal); nextMonthButton.addTarget(self, action: #selector(CalenderController.nextMonthButtonAction), for: .touchUpInside) self.view.addSubview(nextMonthButton); let cancleBtn = UIButton(); self.view.addSubview(cancleBtn); cancleBtn.setBackgroundImage(UIImage.init(named: "登录按钮"), for: .normal); cancleBtn.setTitle("取消", for: .normal) cancleBtn.addTarget(self, action: #selector(canckeAction), for: .touchUpInside); cancleBtn.snp.makeConstraints { (make) in make.top.equalTo(collection.snp.bottom).offset(10); make.centerX.equalToSuperview(); make.width.equalToSuperview().multipliedBy(0.3) make.height.equalTo(30) } } @objc func canckeAction() -> Void { self.dismiss(animated: true) {} } @objc func lastMonthButtonAction() -> Void { if showMonth == 1 { showMonth = 12 showYear -= 1; }else{ showMonth -= 1; } calenderLabel.text = String.init(format: "%d 年 %d 月 ", showYear,showMonth) collection.reloadData(); } @objc func nextMonthButtonAction()->Void{ if showMonth == 12 { showMonth = 1 showYear += 1; }else{ showMonth += 1; } calenderLabel.text = String.init(format: "%d 年 %d 月 ", showYear,showMonth) collection.reloadData(); } //collection view delegate func numberOfSections(in collectionView: UICollectionView) -> Int { return 2; } func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { if section == 0{ return dateArray.count; } return 42 } func collectionView(_ collectionView: UICollectionView, willDisplay cell: UICollectionViewCell, forItemAt indexPath: IndexPath){ if indexPath.section == 1{ let firstWeekDay = NSDate.firstWeekdayInMonth(year: showYear, month: showMonth); let daysInThinsMonth = NSDate.getDaysInMonth(year: showYear, month: showMonth); let index = indexPath.row; var day = 0; let regCell = cell as! CalenderCell regCell.label.backgroundColor = UIColor.white; if index < firstWeekDay{ regCell.label.backgroundColor = UIColor.white; regCell.label.text = "" }else if index > (firstWeekDay + daysInThinsMonth - 1) { regCell.label.backgroundColor = UIColor.white; regCell.label.text = "" }else { day = index - firstWeekDay + 1; regCell.label.text = String.init(format: "%d", day); } if showYear == currentYear && showMonth == currentMonth && day == currentDay{ regCell.label.backgroundColor = UIColor(red: 225/255, green: 75/255, blue: 6/255, alpha: 1); }else{ regCell.label.backgroundColor = UIColor.white; } if showYear > currentYear || (showYear == currentYear && showMonth > currentMonth) || (showYear == currentYear && showMonth == currentMonth && day > currentDay){ regCell.label.textColor = UIColor.gray; }else{ regCell.label.textColor = UIColor.black; } } } func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { if indexPath.section == 0{ let cell = collectionView.dequeueReusableCell(withReuseIdentifier: dateCellId, for: indexPath) as! DateCell; cell.label.text = dateArray[indexPath.row]; return cell; } let cell = collectionView.dequeueReusableCell(withReuseIdentifier: calenderCellId, for: indexPath) as! CalenderCell; return cell; } func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) { if indexPath.section == 0 { return; } let cell = collectionView.cellForItem(at: indexPath) as! CalenderCell; let string = cell.label.text; if string == nil || string?.characters.count == 0{ return; } let showDay = Int(string!)! if showYear > currentYear || (showYear == currentYear && showMonth > currentMonth) || (showYear == currentYear && showMonth == currentMonth && showDay > currentDay){ return ; } if self.delegate != nil { self.delegate?.didSelectData(year: showYear, month: showMonth, day: showDay); } self.dismiss(animated: true) {} } } class CalenderCell: UICollectionViewCell { var label = UILabel() override init(frame: CGRect) { super.init(frame: frame) label = UILabel.init(frame: self.bounds) label.textAlignment = .center; label.layer.cornerRadius = 15; label.layer.masksToBounds = true; self.addSubview(label) } required init?(coder aDecoder: NSCoder) { fatalError("init(coder:) has not been implemented") } } class DateCell: UICollectionViewCell { var label = UILabel() override init(frame: CGRect) { super.init(frame: frame) label = UILabel.init(frame: self.bounds) label.textAlignment = .center; self.addSubview(label) } required init?(coder aDecoder: NSCoder) { fatalError("init(coder:) has not been implemented") } }
3.具体使用：：：
let vc = CalenderController(); vc.delegate = self; self.present(vc, animated: true) { }; //calender delegate func didSelectData(year: Int, month: Int, day: Int) { let timeString = String.init(format: "%d 年 %d 月 %d 日", year,month,day) }
