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extension UITapGestureRecognizer { | |
func didTapAttributedTextInLabel(label: UILabel, targetText: String) -> Bool { | |
guard let attributedString = label.attributedText, let lblText = label.text else { return false } | |
let targetRange = (lblText as NSString).range(of: targetText) | |
//IMPORTANT label correct font for NSTextStorage needed | |
let mutableAttribString = NSMutableAttributedString(attributedString: attributedString) | |
mutableAttribString.addAttributes( | |
[NSAttributedString.Key.font: label.font ?? UIFont.smallSystemFontSize], | |
range: NSRange(location: 0, length: attributedString.length) | |
) | |
// Create instances of NSLayoutManager, NSTextContainer and NSTextStorage | |
let layoutManager = NSLayoutManager() | |
let textContainer = NSTextContainer(size: CGSize.zero) | |
let textStorage = NSTextStorage(attributedString: mutableAttribString) | |
// 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 = label.bounds.size | |
textContainer.size = labelSize | |
// Find the tapped character location and compare it to the specified range | |
let locationOfTouchInLabel = self.location(in: label) | |
let textBoundingBox = layoutManager.usedRect(for: textContainer) | |
let textContainerOffset = 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(x: locationOfTouchInLabel.x - textContainerOffset.x, y: | |
locationOfTouchInLabel.y - textContainerOffset.y); | |
let indexOfCharacter = layoutManager.characterIndex(for: locationOfTouchInTextContainer, in: textContainer, fractionOfDistanceBetweenInsertionPoints: nil) | |
return NSLocationInRange(indexOfCharacter, targetRange) | |
} | |
} | |
//For example adding uilabel then setup | |
let lblPrivacyTerm = UILabel() | |
func setupMultipleTapLabel() { | |
lblPrivacyTerm.text = "By signing up you agree to our Terms of service and Privacy policy ending" | |
let text = (lblPrivacyTerm.text)! | |
let underlineAttriString = NSMutableAttributedString(string: text) | |
let termsRange = (text as NSString).range(of: "Terms of service") | |
let privacyRange = (text as NSString).range(of: "Privacy policy") | |
underlineAttriString.addAttribute(.foregroundColor, value: UIColor.blue, range: termsRange) | |
underlineAttriString.addAttribute(NSAttributedString.Key.underlineStyle, value: NSUnderlineStyle.single.rawValue, range: privacyRange) | |
lblPrivacyTerm.attributedText = underlineAttriString | |
let tapAction = UITapGestureRecognizer(target: self, action: #selector(self.tapLabel(gesture:))) | |
lblPrivacyTerm.isUserInteractionEnabled = true | |
lblPrivacyTerm.addGestureRecognizer(tapAction) | |
} | |
@IBAction func tapLabel(gesture: UITapGestureRecognizer) { | |
if gesture.didTapAttributedTextInLabel(label: lblPrivacyTerm, targetText: "Terms of service") { | |
print("Terms of service") | |
} else if gesture.didTapAttributedTextInLabel(label: lblPrivacyTerm, targetText: "Privacy policy") { | |
print("Privacy policy") | |
} else { | |
print("Tapped none") | |
} | |
} |
switch label.textAlignment {
case .left, .natural, .justified:
alignmentOffset = 0.0
case .center:
alignmentOffset = 0.5
case .right:
alignmentOffset = 1.0
}
let bounds = label.bounds
let xOffset = ((bounds.size.width - textBoundingBox.size.width) * alignmentOffset) - textBoundingBox.origin.x
let yOffset = ((bounds.size.height - textBoundingBox.size.height) * alignmentOffset) - textBoundingBox.origin.y
let textContainerOffset = CGPoint(x: locationOfTouchInLabel.x - xOffset, y: locationOfTouchInLabel.y - yOffset)
it is incorrectly
Its not working when text goes into multiline .It takes click to last second word.
Does not work with multiple links multiple lines unfortunately
unfortunately, its stop working in swift 4 and above
not working it detect before it
Any update on multiple lines?
Any update on multiple lines?
Its working check revisions 5
its not working
did any one find solution of multiline label? I tried latest version but somehow it did not work on swift 5.
Setting
textContainer.lineBreakMode = .byCharWrapping
worked for me.
its not working
Setting
textContainer.lineBreakMode = .byCharWrapping
worked for me.
this code only work for charWrapping or wordWraping line break mode of Label. In default, line break mode of label is truncate tail so the result when label have multi line went wrong
have this code in obj-c ?
Not working for arabic text. any solution ?
For some unknown reason, if the label has a center alignment, the
locationOfTouchInLabel
messed up