IOS-NSRegularExpression: string to be segmented by regular expressions in ios

IOS-NSRegularExpression: string to be segmented by regular expressions in ios

Socialization is more accepted by the society. When a social product is made, it will be displayed by @ others upon reply or forwarding. Click @ user to go to the user's introduction page, here, you must first create appropriate labels, such as: <at href = \ "jecky: // profile/239 \"> iJecky </at>. Then, when the client obtains the text, NSRegularExpression is used to separate strings. The following uses the Rich Text OHAttributedLabel for Demonstration:

Note: The contentLabel used in this article is of the OHAttributedLabel type.

Example:

NSString * atstring = @ "test ah <at href = \" jecky: // profile/239 \ "> iJecky </at> test ah ";

Split first:

NSMutableString * resultStr = [NSMutableStringstringWithCapacity: 0];

NSString * pattern = @ "<at href = \"(.*?) \ "> (.*?) </At> ";

NSRegularExpression * regex = [NSRegularExpressionregularExpressionWithPattern: patternoptions: 0 error: nil];

NSArray * matches = [regexmatchesInString: atstringoptions: 0 range: NSMakeRange (0, atstring. length)];

NSUInteger lastIdx = 0;

For (NSTextCheckingResult * matchin matches)

{

Nsange range = match. range;

If (range. location> lastIdx)

{

NSString * temp = [atstringsubstringWithRange: NSMakeRange (lastIdx, range. location-lastIdx)];

[ResultStr appendString: temp];

}

NSString * link = [atstringsubstringWithRange: [match rangeAtIndex: 1];

NSString * text = [atstring substringWithRange: [matchrangeAtIndex: 2];

NSString * atName = [NSStringstringWithFormat: @ "@ % @", text];

[ResultStr appendString: atName];

[MarkDic setObject: linkforKey: atName];

LastIdx = range. location + range. length;

}

If (lastIdx <atstring. length)

{

NSString * temp = [atstringsubstringFromIndex: lastIdx];

[ResultStr appendString: temp];

}

Self. contentLabel. text = resultStr;

Then displayed on contentLabel

NSRegularExpression * userRegex = [NSRegularExpressionregularExpressionWithPattern: @ "\ B @ \ w +" options: 0 error: nil];

NSMutableAttributedString * mas = [self. contentLabel. attributedTextmutableCopy];

[UserRegex enumerateMatchesInString: self. contentLabel. textoptions: 0

Range: NSMakeRange (0, self. contentLabel. text. length)

UsingBlock: ^ (NSTextCheckingResult * match, NSMatchingFlags flags, BOOL * stop ){

NSString * auser = [self. contentLabel. textsubstringWithRange: match. range];

NSString * atlink = [markDicobjectForKey: auser];

If (atlink ){

[Mas setLink: [NSURLURLWithString: [markDic objectForKey: auser] range: match. range]; // add it

}

}];

OHParagraphStyle * para = [ohparagraphstyledefaparparagraphstyle];

Para. firstLineHeadIndent = 0;

Para. headIndent = 5;

Para. tailIndent =-5;

Para. textAlignment = kCTTextAlignmentLeft;

[Mas setParagraphStyle: para];

[OHASBasicMarkupParserprocessMarkupInAttributedString: mas];

Self. contentLabel. attributedText = mas;