Mutilple links in Label

MLLabel.swift

//
//  MLLabel.swift
//  Starbucks
//
//  Created by Johnny Gu on 09/01/2017.
//  Copyright © 2017 Wiredcraft. All rights reserved.
//

import UIKit

class MLLabel: UILabel {

    /*
    // Only override draw() if you perform custom drawing.
    // An empty implementation adversely affects performance during animation.
    override func draw(_ rect: CGRect) {
        // Drawing code
    }
    */
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        isUserInteractionEnabled = true
    }
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        isUserInteractionEnabled = true
    }
    
    

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        guard let attributedText = attributedText else { return }
        let wholeRange = NSMakeRange(0, attributedText.length)
        attributedText.enumerateAttribute(NSLinkAttributeName, in: wholeRange, options: []) { [weak self] (url, range, stop) in
            if url == nil { return }
            self?.boundingRectsForCharacterRange(range, using: { (rects) in
                if
                    let point = touches.first?.location(in: self),
                    rects.contains(point){
                    stop.pointee = true
                    if let url = url as? URL{
                        if (UIApplication.shared.canOpenURL(url)){
                            UIApplication.shared.openURL(url)
                        }
                    }else if let string = url as? String, let url = URL(string: string) {
                        if (UIApplication.shared.canOpenURL(url)){
                            UIApplication.shared.openURL(url)
                        }
                    }else {
                        
                    }
                    print(url ?? "ppp")
                }
            })
        }
    }
    
    
}

extension UILabel {
    
    func boundingRectsForCharacterRange(_ range: NSRange, using block: @escaping ([CGRect])->Void) {
        guard let attributedText = attributedText else {
            block([])
            return
        }
        
        let textStorage = NSTextStorage(attributedString: attributedText)
        let layoutManager = NSLayoutManager()
        
        textStorage.addLayoutManager(layoutManager)
        
        let textContainer = NSTextContainer(size: bounds.size)
        textContainer.lineFragmentPadding = 0.0
        
        layoutManager.addTextContainer(textContainer)
        
        var glyphRange = NSRange()
        var rects: [CGRect] = []
        
        // Convert the range for glyphs.
        layoutManager.characterRange(forGlyphRange: range, actualGlyphRange: &glyphRange)
        
        layoutManager.enumerateLineFragments(forGlyphRange: glyphRange) { (lineRect, usedRect, container, range, stop) in
            
            if let rect = self.rect(for: glyphRange, in: range, whole: lineRect) {
                rects.append(rect)
            }
            if glyphRange.length + glyphRange.location <= range.length + range.location {
                block(rects)
            }
            print(lineRect, usedRect, range.location, range.length, glyphRange.location, glyphRange.length, stop.pointee)
        }
    }
    
    private func rect(for subRange: NSRange, in range: NSRange, whole rect: CGRect) -> CGRect?{
        let intersectionRange = NSIntersectionRange(subRange, range)
        if intersectionRange.length == 0 { return nil }
        let x = CGFloat(intersectionRange.location - range.location)/CGFloat(range.length) * rect.width + rect.minX
        let width = CGFloat(intersectionRange.length)/CGFloat(range.length) * rect.width
        return CGRect(x: x, y: rect.minY, width: width, height: rect.height)
    }
    
    func boundingRectForCharacterRange(range: NSRange) -> CGRect? {
        
        guard let attributedText = attributedText else { return nil }
        
        let textStorage = NSTextStorage(attributedString: attributedText)
        let layoutManager = NSLayoutManager()
        
        textStorage.addLayoutManager(layoutManager)
        
        let textContainer = NSTextContainer(size: bounds.size)
        textContainer.lineFragmentPadding = 0.0
        
        layoutManager.addTextContainer(textContainer)
        
        var glyphRange = NSRange()
        
        // Convert the range for glyphs.
        layoutManager.characterRange(forGlyphRange: range, actualGlyphRange: &glyphRange)
        
        layoutManager.enumerateLineFragments(forGlyphRange: glyphRange) { (lineRect, usedRect, container, range, stop) in
//            print(lineRect, usedRect, range.location, range.length, glyphRange.location, glyphRange.length)
        }
        
        return layoutManager.boundingRect(forGlyphRange: glyphRange, in: textContainer)
    }
}

extension Sequence where Iterator.Element == CGRect {
    func contains(_ point: CGPoint) -> Bool {
        var result = false
        self.forEach({ if $0.contains(point) { result = true }})
        return result
    }
}