kylehowells · March 20, 2024 01:24 · Mar 20, 2024
diff --git a/Tap links in UILabel.swift b/Tap links in UILabel.swift
@@ -0,0 +1,118 @@
+// Setup Label
+
+let label: UILabel = {
+	let label = UILabel()
+	label.isUserInteractionEnabled = true
+
+	label.adjustsFontSizeToFitWidth = true
+	label.numberOfLines = 0
+
+	label.textColor = UIColor(white: 0, alpha: 1)
+	label.tintColor = UIColor.red
+
+	label.textAlignment = .center
+
+	let fontSize: CGFloat = 20
+
+	label.font = UIFont.systemFont(ofSize: fontSize, weight: .medium)
+
+	// - Attributes
+
+	let attributes: [NSAttributedString.Key : Any] = [
+		.font : UIFont.systemFont(ofSize: fontSize, weight: .regular),
+		.foregroundColor: UIColor(white: 0, alpha: 0.6)
+	]
+
+	let linkAttributes: [NSAttributedString.Key : Any] = [
+		.font : UIFont.systemFont(ofSize: fontSize, weight: .medium),
+		.foregroundColor: UIColor(white: 0, alpha: 1),
+		.attachment: "https://google.com"
+	]
+
+	let attributedString: NSMutableAttributedString = NSMutableAttributedString(string: "", attributes: attributes)
+
+	attributedString.append(NSAttributedString(
+		string: "Hello",
+		attributes: attributes
+	))
+
+	attributedString.append(NSAttributedString(
+		string: " World ",
+		attributes: linkAttributes
+	))
+
+	attributedString.append(NSAttributedString(
+		string: "Testing",
+		attributes: attributes
+	))
+
+	label.attributedText = attributedString
+
+	label.layer.borderWidth = 1
+	label.layer.borderColor = UIColor(white: 0, alpha: 1).cgColor
+
+	return label
+}()
+
+
+// MARK: - Tap Label
+
+@objc func tappedOnLabel(tapGesture: UITapGestureRecognizer) {
+	guard tapGesture.state == .recognized else { return }
+	print("tapGesture.state: \(tapGesture.state)")
+
+	let locationOfTouchInLabel: CGPoint = tapGesture.location(in: self._view.label)
+
+	print("self.tapLabel( locationOfTouchInLabel: \(locationOfTouchInLabel) )")
+
+	let label: UILabel = self._view.label
+
+	let attributedText: NSAttributedString = label.attributedText!
+
+	// Create instances of NSLayoutManager, NSTextContainer and NSTextStorage
+	let layoutManager: NSLayoutManager = NSLayoutManager()
+	let textContainer: NSTextContainer = NSTextContainer(size: CGSize.zero)
+	let textStorage: NSTextStorage = NSTextStorage(attributedString: attributedText)
+
+	// Configure layoutManager and textStorage
+	layoutManager.addTextContainer(textContainer)
+	textStorage.addLayoutManager(layoutManager)
+
+	// Configure textContainer
+	textContainer.lineFragmentPadding = 0.0
+	textContainer.lineBreakMode = label.lineBreakMode
+	textContainer.maximumNumberOfLines = label.numberOfLines
+
+	let labelSize: CGSize = label.bounds.size
+	textContainer.size = labelSize
+
+	let textBoundingBox: CGRect = layoutManager.usedRect(for: textContainer)
+
+	// - NSTextStorage
+
+	let textContainerOffset: CGPoint = CGPoint(
+		x: (labelSize.width - textBoundingBox.size.width) * 0.5 - textBoundingBox.origin.x,
+		y: (labelSize.height - textBoundingBox.size.height) * 0.5 - textBoundingBox.origin.y
+	)
+
+	let locationOfTouchInTextContainer: CGPoint = CGPoint(
+		x: locationOfTouchInLabel.x - textContainerOffset.x,
+		y: locationOfTouchInLabel.y - textContainerOffset.y
+	)
+
+	let indexOfCharacter: Int = layoutManager.characterIndex(
+		for: locationOfTouchInTextContainer,
+		in: textContainer,
+		fractionOfDistanceBetweenInsertionPoints: nil
+	)
+
+	let attachment = attributedText.attribute(.attachment, at: indexOfCharacter, effectiveRange: nil)
+
+	print("attachment: \(attachment) - \( type(of: attachment) )")
+
+	if let textLink: String = attachment as? String,
+	   let url: URL = URL(string: textLink)
+	{
+		UIApplication.shared.open(url)
+	}
+}