Question

我想显示英文日期风格。我制作了以下代码，以便让角色重新设计＆＃34;：

    - (NSMutableAttributedString *)attributedInfoString:(NSString *)string;
    {
        NSMutableAttributedString *attString = [[NSMutableAttributedString alloc] initWithString:string];
        UIFont *smallFont = [UIFont boldSystemFontOfSize:17.0f];
        UIFont *boldFont = [UIFont fontWithName:@"HelveticaNeue-Bold" size:24.0f];

        [attString beginEditing];

        [attString addAttribute:NSFontAttributeName value:(smallFont) range:[string rangeOfString:@"th"]];
        [attString addAttribute:NSFontAttributeName value:(smallFont) range:[string rangeOfString:@"th" options:NSBackwardsSearch]];
        [attString addAttribute:(NSString*)kCTSuperscriptAttributeName value:@"1" range:[string rangeOfString:@"th"]];
        [attString addAttribute:(NSString*)kCTSuperscriptAttributeName value:@"1" range:[string rangeOfString:@"th" options:NSBackwardsSearch]];

        [attString addAttribute:NSFontAttributeName value:(boldFont) range:[string rangeOfString:@"the"]];
        [attString addAttribute:NSFontAttributeName value:(boldFont) range:[string rangeOfString:@"the" options:NSBackwardsSearch]];
        [attString addAttribute:(NSString*)kCTSuperscriptAttributeName value:@"0" range:[string rangeOfString:@"the"]];
        [attString addAttribute:(NSString*)kCTSuperscriptAttributeName value:@"0" range:[string rangeOfString:@"the" options:NSBackwardsSearch]];

        [attString addAttribute:NSFontAttributeName value:(smallFont) range:[string rangeOfString:@"st"]];
        [attString addAttribute:NSFontAttributeName value:(smallFont) range:[string rangeOfString:@"st" options:NSBackwardsSearch]];
        [attString addAttribute:(NSString*)kCTSuperscriptAttributeName value:@"1" range:[string rangeOfString:@"st"]];
        [attString addAttribute:(NSString*)kCTSuperscriptAttributeName value:@"1" range:[string rangeOfString:@"st" options:NSBackwardsSearch]];

        [attString addAttribute:NSFontAttributeName value:(boldFont) range:[string rangeOfString:@"August"]];
        [attString addAttribute:(NSString*)kCTSuperscriptAttributeName value:@"0" range:[string rangeOfString:@"August"]];

...

        [attString endEditing];
        return attString;
    }

问题是，我发现只有第一个＆＃34;命中＆＃34;从开始到结束。如何安排搜索整个字符串？特别是关于＆＃34;＆＃34;因为在字符串中有时是单词的5或6倍＆＃34;＆＃34;然后停止添加属性。

Answer 1

如果找到“th”，请使用-rangeOfString:options:range:继续循环（将范围参数设置为刚刚找到它的位置）。

Answer 2

我不确定你想要达到的目标。但这是我通常用于为长字符串添加属性的内容。

- (NSMutableAttributedString *)attributedInfoString:(NSString *)string;
{
    __block NSMutableAttributedString *attriString = [[NSMutableAttributedString alloc] initWithString:string];

    [attriString addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:15.0f] range:NSMakeRange(0, string.length)];

    UIFont *bold = [UIFont boldSystemFontOfSize:17.0f];

    __block BOOL mustStop = NO;

    [string enumerateSubstringsInRange:NSMakeRange(0, [string length])
                               options:NSStringEnumerationByWords
                            usingBlock:^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop)
     {
         // terminates adding of attribute to string if YES
         // as you can see `og` from the word dog is ignored
         if (!mustStop)
         {
             // since we are enumeratingByWord this is to check for specific string(word) in the `string`
             // in this example `the` is the trigger to terminate adding attributes to mutableString
             //
             if (![substring isEqual:@"the"])
             {
                 // add attribute if the substring(word) has `ox` or `og`
                 //
                 if ([substring rangeOfString:@"ox"].location != NSNotFound || [substring rangeOfString:@"og"].location != NSNotFound)
                 {
                     [attriString addAttribute:NSFontAttributeName value:bold range:substringRange];
                 }

                 else
                 {
                     // this is to add attribute to some specified `substring`
                     //
                     NSString *subsubString = @"uic";

                     NSRange subRange = [substring rangeOfString:subsubString];

                     if (subRange.location != NSNotFound)
                     {
                         substringRange.location += subRange.location;

                         substringRange.length = subsubString.length;

                         [attriString addAttribute:NSForegroundColorAttributeName value:[UIColor orangeColor] range:substringRange];

                         [attriString addAttribute:NSFontAttributeName value:bold range:substringRange];
                     }
                 }
             } else mustStop = YES;
         }
     }
     ];

    return attriString;
}

如果您使用它：

title.attributedText = [self attributedInfoString:@"The quick brown fox jumped over the lazy dog"];

示例输出将是：

希望这会有所帮助..干杯！：）

Answer 3

感谢0yeoj我找到了解决方案：

在字符串中删除开始标记，并用唯一字符替换结束标记，按此顺序不会有任何单词（öäüß）。
使用0yeoj中的代码查找字符串“thöäüß”，stöäüß等，并根据需要添加属性。
我的错误发生了 - 我试图删除子循环中的字符“öäüß”，这会导致崩溃。
在此处的另一篇文章中找到解决方案并将其放在return-expression之前：

while（[attriString.string containsString：@“öäüß”]）{ NSRange rangeOfTag = [attriString.string rangeOfString：@“öäüß”]; [attriString replaceCharactersInRange：rangeOfTag withString：@“”]; }

现在工作完美。感谢您的快速帮助。

xcode iOS NSMutableAttributedString多次添加属性

3 个答案: