private func check(str: String) { // 使用正則表達式一定要加try語句 do {  // - 1、創建規則  let pattern = "[1-9][0-9]{4,14}"  // - 2、創建正則表達式對象  let regex = try NSRegularExpression(pattern: pattern, options: NSRegularExpressionOptions.CaseInsensitive)  // - 3、開始匹配  let res = regex.matchesInString(str, options: NSMatchingOptions(rawValue: 0), range: NSMakeRange(0, str.characters.count))  // 輸出結果  for checkingRes in res {   print((str as NSString).substringWithRange(checkingRes.range))  } } catch {  print(error) }}

 // 匹配字符串中所有的符合規則的字符串, 返回匹配到的NSTextCheckingResult數組      public func matchesInString(string: String, options: NSMatchingOptions, range: NSRange) -> [NSTextCheckingResult]            // 按照規則匹配字符串, 返回匹配到的個數      public func numberOfMatchesInString(string: String, options: NSMatchingOptions, range: NSRange) -> Int            // 按照規則匹配字符串, 返回第一個匹配到的字符串的NSTextCheckingResult      public func firstMatchInString(string: String, options: NSMatchingOptions, range: NSRange) -> NSTextCheckingResult?            // 按照規則匹配字符串, 返回第一個匹配到的字符串的范圍      public func rangeOfFirstMatchInString(string: String, options: NSMatchingOptions, range: NSRange) -> NSRange

public class NSDataDetector : NSRegularExpression { // all instance variables are private /* NSDataDetector is a specialized subclass of NSRegularExpression. Instead of finding matches to regular expression patterns, it matches items identified by Data Detectors, such as dates, addresses, and URLs. The checkingTypes argument should contain one or more of the types NSTextCheckingTypeDate, NSTextCheckingTypeAddress, NSTextCheckingTypeLink, NSTextCheckingTypePhoneNumber, and NSTextCheckingTypeTransitInformation. The NSTextCheckingResult instances returned will be of the appropriate types from that list. */ public init(types checkingTypes: NSTextCheckingTypes) throws public var checkingTypes: NSTextCheckingTypes { get }}// 這個是類型選擇 public static var Date: NSTextCheckingType { get } // date/time detection public static var Address: NSTextCheckingType { get } // address detection public static var Link: NSTextCheckingType { get } // link detection

 /**匹配字符串中的URLS- parameter str: 要匹配的字符串*/private func getUrl(str:String) { // 創建一個正則表達式對象 do {  let dataDetector = try NSDataDetector(types: NSTextCheckingTypes(NSTextCheckingType.Link.rawValue))  // 匹配字符串，返回結果集  let res = dataDetector.matchesInString(str, options: NSMatchingOptions(rawValue: 0), range: NSMakeRange(0, str.characters.count))  // 取出結果  for checkingRes in res {   print((str as NSString).substringWithRange(checkingRes.range))  } } catch {  print(error) }}

 /**顯示字符中的表情- parameter str: 匹配字符串*/private func getEmoji(str:String) { let strM = NSMutableAttributedString(string: str) do {  let pattern = "http://[.*?//]"  let regex = try NSRegularExpression(pattern: pattern, options: NSRegularExpressionOptions.CaseInsensitive)  let res = regex.matchesInString(str, options: NSMatchingOptions(rawValue: 0), range: NSMakeRange(0, str.characters.count))  var count = res.count  // 反向取出文字表情  while count > 0 {   let checkingRes = res[--count]   let tempStr = (str as NSString).substringWithRange(checkingRes.range)   // 轉換字符串到表情   if let emoticon = EmoticonPackage.emoticonWithStr(tempStr) {    print(emoticon.chs)    let attrStr = EmoticonTextAttachment.imageText(emoticon, font: 18)    strM.replaceCharactersInRange(checkingRes.range, withAttributedString: attrStr)   }  }  print(strM)  // 替換字符串,顯示到label  emoticonLabel.attributedText = strM } catch {  print(error) }}

 /* 只要textStorage中的內容發生變化, 就可以通知layoutManager重新布局 layoutManager重新布局需要知道繪制到什么地方, 所以layoutManager就會文textContainer繪制的區域 */ // 準們用于存儲內容的 // textStorage 中有 layoutManager private lazy var textStorage = NSTextStorage() // 專門用于管理布局 // layoutManager 中有 textContainer private lazy var layoutManager = NSLayoutManager() // 專門用于指定繪制的區域 private lazy var textContainer = NSTextContainer() override init(frame: CGRect) {   super.init(frame: frame)   setupSystem() } required init?(coder aDecoder: NSCoder) {   super.init(coder: aDecoder)   setupSystem() } private func setupSystem() {   // 1.將layoutManager添加到textStorage   textStorage.addLayoutManager(layoutManager)   // 2.將textContainer添加到layoutManager   layoutManager.addTextContainer(textContainer) } override func layoutSubviews() {   super.layoutSubviews()  // 3.指定區域   textContainer.size = bounds.size }

override var text: String?  {  didSet{ // 1.修改textStorage存儲的內容 textStorage.setAttributedString(NSAttributedString(string: text!)) // 2.設置textStorage的屬性 textStorage.addAttribute(NSFontAttributeName, value: UIFont.systemFontOfSize(20), range: NSMakeRange(0, text!.characters.count)) // 3.處理URL self.URLRegex() // 2.通知layoutManager重新布局 setNeedsDisplay()  }}

 func URLRegex() {  // 1.創建一個正則表達式對象  do{   let dataDetector = try NSDataDetector(types: NSTextCheckingTypes(NSTextCheckingType.Link.rawValue))   let res = dataDetector.matchesInString(textStorage.string, options: NSMatchingOptions(rawValue: 0), range: NSMakeRange(0, textStorage.string.characters.count))   // 4取出結果   for checkingRes in res   {    let str = (textStorage.string as NSString).substringWithRange(checkingRes.range)    let tempStr = NSMutableAttributedString(string: str)//  tempStr.addAttribute(NSForegroundColorAttributeName, value: UIColor.redColor(), range: NSMakeRange(0, str.characters.count))    tempStr.addAttributes([NSFontAttributeName: UIFont.systemFontOfSize(20), NSForegroundColorAttributeName: UIColor.redColor()], range: NSMakeRange(0, str.characters.count))    textStorage.replaceCharactersInRange(checkingRes.range, withAttributedString: tempStr)   }  }catch  {   print(error)  } }

 // 如果是UILabel調用setNeedsDisplay方法, 系統會促發drawTextInRectoverride func drawTextInRect(rect: CGRect) { // 重繪 // 字形 : 理解為一個小的UIView /* 第一個參數: 指定繪制的范圍 第二個參數: 指定從什么位置開始繪制 */ layoutManager.drawGlyphsForGlyphRange(NSMakeRange(0, text!.characters.count), atPoint: CGPointZero)}

 override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) { // 1、獲取手指點擊的位置 let touch = (touches as NSSet).anyObject()! let point = touch.locationInView(touch.view) print(point) // 2、獲取URL區域 // 注意: 沒有辦法直接設置UITextRange的范圍 let range = NSMakeRange(10, 20) // 只要設置selectedRange, 那么就相當于設置了selectedTextRange selectedRange = range // 給定指定的range, 返回range對應的字符串的rect // 返回數組的原因是因為文字可能換行 let array = selectionRectsForRange(selectedTextRange!) for selectionRect in array {   if CGRectContainsPoint(selectionRect.rect, point) {    print("點擊了URL")   } }}