我想将stringWithHashtags
中的每个单词添加到以attString
和@
开头的#
中。我认为最简单的方法是将两个NSRegularExpression
合并,然后将其分配给数组。实际上,我是像这样互相分配它们:
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"#(\\w+)" options:0 error:&error];
NSRegularExpression *regexM = [NSRegularExpression regularExpressionWithPattern:@"@(\\w+)" options:0 error:&error];
NSArray *matches = [regex matchesInString:stringWithHashtags options:0 range:NSMakeRange(0, stringWithHashtags.length)];
matches = [regexM matchesInString:stringWithHashtags options:0 range:NSMakeRange(0, stringWithHashtags.length)];
结果中只提到蓝色(仅适用于主题标签)
这是我的完整方法:
-(NSMutableAttributedString*)detectHashtags:(NSString *)stringWithHashtags{
NSError *error = nil;
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"#(\\w+)" options:0 error:&error];
NSRegularExpression *regexTag = [NSRegularExpression regularExpressionWithPattern:@"@(\\w+)" options:0 error:&error];
NSArray *matches = [regex matchesInString:stringWithHashtags options:0 range:NSMakeRange(0, stringWithHashtags.length)];
matches = [regexTag matchesInString:stringWithHashtags options:0 range:NSMakeRange(0, stringWithHashtags.length)];
NSMutableAttributedString *attString= [[NSMutableAttributedString alloc] initWithString:stringWithHashtags];
NSInteger stringLength= [stringWithHashtags length];
for (NSTextCheckingResult *match in matches) {
NSRange wordRange = [match rangeAtIndex:0];
NSString* word = [stringWithHashtags substringWithRange:wordRange];
UIColor *foregroundColor=[UIColor blueColor];
[attString addAttribute:NSForegroundColorAttributeName value:foregroundColor range:wordRange];
}
UIFont *font=[UIFont fontWithName:@"Helvetica" size:13.0f];
[attString addAttribute:NSFontAttributeName value:font range:NSMakeRange(0, stringLength)];
return attString;
}
是否可以以某种方式合并
regex
和regexTag
? 最佳答案
您是否考虑过合并正则表达式模式而不是NSRegularExpression
实例?
给定re1和re2,则模式(re1)|(re2)与它们中的任何一个匹配。例如,#| @匹配#或@。您也可以使用[set中的字符]来匹配一组字符中的一个。
高温超导