我正在使用 NSRegularExpression 阅读文本并找出主题标签。这是我在 regularExpressionWithPattern 中使用的 NSString。
- (NSString *)hashtagRegex
{
return @"#((?:[A-Za-z0-9-_]*))";
//return @"#{1}([A-Za-z0-9-_]{2,})";
}
这是我的方法:
// Handle Twitter Hashtags
detector = [NSRegularExpression regularExpressionWithPattern:[self hashtagRegex] options:0 error:&error];
links = [detector matchesInString:theText options:0 range:NSMakeRange(0, theText.length)];
current = [NSMutableArray arrayWithArray:links];
NSString *hashtagURL = @"http://twitter.com/search?q=%23";
//hashtagURL = [hashtagURL stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding];
for ( int i = 0; i < [links count]; i++ ) {
NSTextCheckingResult *cr = [current objectAtIndex:i];
NSString *url = [theText substringWithRange:cr.range];
NSString *nohashURL = [url stringByReplacingOccurrencesOfString:@"#" withString:@""];
nohashURL = [nohashURL stringByReplacingOccurrencesOfString:@" " withString:@""];
[theText replaceOccurrencesOfString:url
withString:[NSString stringWithFormat:@"<a href=\"%@%@\">%@</a>", hashtagURL, nohashURL, url]
options:NSLiteralSearch
range:NSMakeRange(0, theText.length)];
current = [NSMutableArray arrayWithArray:[detector matchesInString:theText options:0 range:NSMakeRange(0, theText.length)]];
}
[theText replaceOccurrencesOfString:@"\n" withString:@"<br />" options:NSLiteralSearch range:NSMakeRange(0, theText.length)];
[_aWebView loadHTMLString:[self embedHTMLWithFontName:[self fontName]
size:[self fontSize]
text:theText]
baseURL:nil];
一切正常,但是当我使用这样的字符串时,它发现了一个小问题:
NSString * theText = @"#twitter #twitterapp #twittertag";
我的代码仅在每个单词上突出显示#twitter,而不是第二部分(#twitter #twitter(app) #twitter(tag))。我希望有人能帮助我!
谢谢 :)