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Make a clickable link in an UILabel
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| self.policyLabel.html = @"Please <a href='https://gist.github.com/yycking/aef2cb0afafbaf3a04a4e40123704437'>clcik me</a>. "; |
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| @implementation UILabel (PLUS) | |
| - (void)setHtml:(NSString*)text { | |
| NSString *color = [self hexFromUIColor:self.textColor]; | |
| NSString *html = [NSString stringWithFormat:@"<html><head><style type=\"text/css\">\ | |
| body {font-family: '%@'; font-size:%@px;color: %@;}\ | |
| a {color: %@;}\ | |
| </style></head><body>%@</body></html>", | |
| self.font.fontName, @(self.font.pointSize), color, | |
| color, | |
| text]; | |
| self.attributedText = [[NSAttributedString alloc] initWithData:[html dataUsingEncoding:NSUTF8StringEncoding] | |
| options:@{NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType, | |
| NSCharacterEncodingDocumentAttribute: @(NSUTF8StringEncoding)} | |
| documentAttributes:nil error:nil]; | |
| self.userInteractionEnabled = YES; | |
| [self addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTapOnLabel:)]]; | |
| } | |
| - (void)handleTapOnLabel:(UITapGestureRecognizer *)tapGesture | |
| { | |
| NSAttributedString *text = self.attributedText; | |
| NSRange range = NSMakeRange(0, text.length); | |
| CGPoint touch = [tapGesture locationInView:self]; | |
| NSLayoutManager *layoutManager = NSLayoutManager.new; | |
| NSTextStorage *textStorage = [NSTextStorage.alloc initWithAttributedString:text]; | |
| [textStorage addLayoutManager:layoutManager]; | |
| NSTextContainer *textContainer = [NSTextContainer.alloc initWithSize:self.bounds.size]; | |
| textContainer.lineFragmentPadding = 0; | |
| textContainer.maximumNumberOfLines = self.numberOfLines; | |
| textContainer.lineBreakMode = self.lineBreakMode; | |
| [layoutManager addTextContainer:textContainer]; | |
| [layoutManager ensureLayoutForGlyphRange:range]; | |
| CGRect textBoundingBox = [layoutManager usedRectForTextContainer:textContainer]; | |
| CGPoint textContainerOffset = CGPointMake( | |
| (self.bounds.size.width - textBoundingBox.size.width) * 0.5 - textBoundingBox.origin.x, | |
| (self.bounds.size.height - textBoundingBox.size.height) * 0.5 - textBoundingBox.origin.y); | |
| CGPoint locationOfTouchInTextContainer = CGPointMake(touch.x - textContainerOffset.x, | |
| touch.y - textContainerOffset.y); | |
| NSInteger characterIndex = [layoutManager characterIndexForPoint:locationOfTouchInTextContainer inTextContainer:textContainer fractionOfDistanceBetweenInsertionPoints:nil]; | |
| NSDictionary *attrs = [text attributesAtIndex:characterIndex effectiveRange:&range]; | |
| NSString *url = attrs[NSLinkAttributeName]; | |
| if (url) { | |
| } | |
| } | |
| @end |
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