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我有一个自定义的 UILabel。我想将我检测到的任何 URL 大写并加粗。URL 没有大写和加粗。我有一种感觉，我的检测是错误的。

这是我的正则表达式：

static NSRegularExpression *websiteRegularExpression;
static inline NSRegularExpression * WebsiteRegularExpression() {
    if (!websiteRegularExpression) {
        websiteRegularExpression = [[NSRegularExpression alloc] initWithPattern:@"\b(https?|ftp|file)://[-A-Z0-9+&@#/%?=~_|!:,.;]*[A-Z0-9+&@#/%=~_|]" 
                                                                        options:NSRegularExpressionCaseInsensitive 
                                                                          error:nil];
    }

    return websiteRegularExpression;
}

这是我进行解析的地方：

-(void)setBodyText
{
    __block NSRegularExpression *regexp = nil;   
    NSString* labelText = @"http://www.google.com is a cool website";
    [self.bodyLabel setText:labelText afterInheritingLabelAttributesAndConfiguringWithBlock:^NSAttributedString *(NSMutableAttributedString *mutableAttributedString) {

        NSRange stringRange = NSMakeRange(0, [mutableAttributedString length]);

        regexp = WebsiteRegularExpression ();
        NSRange nameRange = [regexp rangeOfFirstMatchInString:[mutableAttributedString string] options:0 range:stringRange];
        UIFont *boldSystemFont = [UIFont boldSystemFontOfSize:18.0]; 
        CTFontRef boldFont = CTFontCreateWithName((CFStringRef)boldSystemFont.fontName, boldSystemFont.pointSize, NULL);
        if (boldFont) {
            [mutableAttributedString addAttribute:(NSString *)kCTFontAttributeName value:(id)boldFont range:nameRange];
            CFRelease(boldFont);
        }

        if (nameRange.location != NSNotFound)
            [mutableAttributedString replaceCharactersInRange:nameRange withString:[[[mutableAttributedString string] substringWithRange:nameRange] uppercaseString]];
        return mutableAttributedString;
    }];

    regexp = WebsiteRegularExpression();
    NSRange linkRange = [regexp rangeOfFirstMatchInString:labelText options:0 range:NSMakeRange(0, [labelText length])];
    NSURL *url = [NSURL URLWithString:@"http://www.google.com"];
    [self.bodyLabel addLinkToURL:url withRange:linkRange];
}
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1 回答 1

3

不要使用正则表达式来检测 URL。使用NSDataDetector, 然后使用 的-range来NSTextCheckingResult加粗范围。

于 2011-06-29T18:23:15.820 回答