Question

我目前正在使用NSDataDetectors查找链接：

-(void)setBodyText
{
    NSString* labelText = [[message valueForKey:@"body"]gtm_stringByUnescapingFromHTML];

    NSDataDetector *linkDetector = [NSDataDetector dataDetectorWithTypes:NSTextCheckingTypeLink error:nil];
    NSArray *matches = [linkDetector matchesInString:labelText options:0 range:NSMakeRange(0, [labelText length])];
    for (NSTextCheckingResult *match in matches) {
        if ([match resultType] == NSTextCheckingTypeLink) {
            NSURL *url = [match URL];
            [bodyLabel addCustomLink:url inRange:[match range]];
            NSLog(@"found URL: %@", url);
        }
    }

    [bodyLabel setText:labelText];
    [Utils alignLabelWithTop:bodyLabel];
}

如何使用NSDataDetectors解析@，例如：

"Hello @sheehan, you are cool"

我希望它能够检测到@sheehan

注意：我想使用NSDataDetector或正则表达式模式匹配。没有客户标签或控件等。

Answer 1

您可以使用此方法使用NSRegularExpression查找@name匹配。

- (NSMutableArray *)findTwitterHandle:(NSString *)text {

    NSError *error = nil;

    NSRegularExpression *regex = [[NSRegularExpression alloc] initWithPattern:@"(@[a-zA-Z0-9_]+)" 
                                                                  options:NSRegularExpressionCaseInsensitive 
                                                                    error:&error];

    if (error != nil) {

        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" 
                                                    message:[error localizedDescription] 
                                                   delegate:nil 
                                          cancelButtonTitle:nil 
                                          otherButtonTitles:@"Ok", nil];

        [alert show];

        [alert release];

    }

    NSMutableArray *siteNames = [NSMutableArray array];

    NSArray *matches = [regex matchesInString:text options:0 range:NSMakeRange(0, [text length])];

    for (NSTextCheckingResult *result in matches) {

        [siteNames addObject:[text substringWithRange:result.range]];

    }

    [regex release];

    return siteNames;

}

此方法将返回带有所有匹配字符串的NSMutableArray。

如何使用自定义NSDataDetector来检测某些正则表达式模式？

1 个答案: