Objective c 目标c-HTML到NSAttribute字符串

我编写了一个函数，可以将HTML文本转换为

NSAttributedString

。它工作得很好。然而，我注意到一些标记嵌套在另一个标记中时，它们的字体会被覆盖

这是我的密码

+(NSMutableAttributedString*) replaceHTMLTags : (NSString*) text : (NSString*) fontName : (CGFloat) fontSize
{
    UIFont* font = [UIFont fontWithName:fontName size:fontSize];
    NSMutableParagraphStyle* paragraphStyle = [[NSMutableParagraphStyle alloc]init];
    paragraphStyle.lineBreakMode = NSLineBreakByWordWrapping;
    paragraphStyle.alignment = NSTextAlignmentJustified;

    text = [text stringByReplacingOccurrencesOfString:@"<br>" withString:@"\n"];
    NSMutableAttributedString* finalText = [[NSMutableAttributedString alloc]initWithString:text];

    [finalText setAttributes:@{NSFontAttributeName:font} range:NSMakeRange(0, [finalText string].length)];

    finalText = [self recurseFunc:finalText :@"" : font : paragraphStyle];
    return finalText;
}

+(NSMutableAttributedString*) recurseFunc : (NSMutableAttributedString*) text : (NSString*) tag : (UIFont*) font : (NSMutableParagraphStyle*) paragraphStyle
{
    NSMutableAttributedString* finalText = text;

    NSRange newOpenTagRange;
    //RECURSE IF THERE ARE MORE TAGS
    while((newOpenTagRange = [[text string] rangeOfString:@"<[^>]+>" options:NSRegularExpressionSearch]).location != NSNotFound)
    {
        NSString* openTagName = [[text string] substringWithRange:newOpenTagRange];
        NSString* closeTagName = [self getCloseTagName: openTagName];
        NSRange newCloseTagRange = [[text string ]rangeOfString:closeTagName];

        if(newCloseTagRange.location != NSNotFound)
        {
            NSString* textWithTags = [[text string] substringWithRange:NSMakeRange(newOpenTagRange.location, newCloseTagRange.location - newOpenTagRange.location + newCloseTagRange.length)];
            NSString* newPlainText = [textWithTags stringByReplacingOccurrencesOfString:openTagName withString:@""];
            newPlainText = [newPlainText stringByReplacingOccurrencesOfString:closeTagName withString:@""];

            NSMutableAttributedString* newText = [[NSMutableAttributedString alloc]initWithString:newPlainText attributes:@{NSFontAttributeName:font,  NSParagraphStyleAttributeName:paragraphStyle}];

            newText = [self recurseFunc:newText :openTagName : font : paragraphStyle];
            [finalText replaceCharactersInRange:NSMakeRange(newOpenTagRange.location, newCloseTagRange.location - newOpenTagRange.location + newCloseTagRange.length) withAttributedString:newText];
        }
        else
        {
            NSLog(@"Cannot find closing tag for tag %@", openTagName);
        }
    }

    //FORMAT HTML TAGS
    if([tag containsString:@"<p"])
    {
        [finalText.mutableString appendString:@"\n\n"];
    }

    else if ([tag isEqualToString:@"<i>"])
    {
        UIFont* italicFont = [UIFont fontWithName:@"Arial-ItalicMT" size:DEFAULT_FONT_SIZE];
        [finalText addAttribute:NSFontAttributeName value:italicFont range:NSMakeRange(0, [finalText string].length)];
    }
    else if ([tag isEqualToString:@"<b>"])
    {
        UIFont* boldFont = [UIFont fontWithName:@"Arial-BoldMT" size:DEFAULT_FONT_SIZE];
        [finalText addAttribute:NSFontAttributeName value:boldFont range:NSMakeRange(0, [finalText string].length)];

    }
    else if([tag isEqualToString:@"<ul>"])
    {
        NSMutableParagraphStyle* tempStyle = [[NSMutableParagraphStyle alloc]init];
        tempStyle.headIndent = 30;
        tempStyle.firstLineHeadIndent = 10;
        tempStyle.lineBreakMode = NSLineBreakByWordWrapping;
        tempStyle.alignment = NSTextAlignmentJustified;

        NSString* temp = [[finalText string]stringByReplacingOccurrencesOfString:@"###" withString:@"•\t"];
        temp = [NSString stringWithFormat:@"\n%@", temp];
        [finalText setAttributedString:[[NSAttributedString alloc] initWithString:temp]];

        [finalText addAttribute:NSParagraphStyleAttributeName value:tempStyle range:NSMakeRange(0, [finalText string].length)];


    }
    else if ([tag isEqualToString:@"<li>"])
    {
        NSMutableAttributedString* tempAS = [[NSMutableAttributedString alloc]initWithString:@"###$$$\n"];
        NSRange r = [[tempAS string]rangeOfString:@"$$$"];
        [tempAS replaceCharactersInRange:r withAttributedString:finalText];
        [finalText setAttributedString:tempAS];

    }
    return finalText;
}

+（NSMutableAttributedString*）替换HtmlTags:（NSString*）文本：（NSString*）fontName:（CGFloat）fontSize
{
UIFont*font=[UIFont fontWithName:fontName size:fontSize]；
NSMutableParagraphStyle*paragraphStyle=[[NSMutableParagraphStyle alloc]init]；
paragraphStyle.lineBreakMode=NSLineBreakByWordWrapping；
paragraphStyle.alignment=NSTextAlignmentJustified；
text=[text stringByReplacingOccurrencesOfString:@“
”with string:@“\n”]；
NSMutableAttributedString*finalText=[[NSMutableAttributedString alloc]initWithString:text]；
[finalText setAttributes:@{NSFontAttributeName:font}范围：NSMakeRange（0[finalText string].length]）；
finalText=[自递归函数：finalText:@”“：字体：段落样式]；
返回finalText；
}
+（NSMutableAttributedString*）递归函数：（NSMutableAttributedString*）文本：（NSString*）标记：（UIFont*）字体：（NSMutableParagraphStyle*）段落样式
{
NSMutableAttributeString*finalText=文本；
NSRange newOpenTagRange；
//如果有更多标记，则递归
while（（newOpenTagRange=[[text string]rangeOfString:@“]+>”选项：NSRegularExpressionSearch]）。位置！=NSNotFound）
{
NSString*openTagName=[[text string]substringWithRange:newOpenTagRange]；
NSString*closeTagName=[self-getCloseTagName:openTagName]；
NSRange newCloseTagRange=[[text string]rangeOfString:closeTagName]；
if（newCloseTagRange.location！=NSNotFound）
{
NSString*textWithTags=[[text string]substringWithRange:NSMakeRange（newOpenTagRange.location，newCloseTagRange.location-newOpenTagRange.location+newCloseTagRange.length）]；
NSString*newPlainText=[textWithTags stringByReplacingOccurrencesOfString:openTagName withString:@”“]；
newPlainText=[newPlainText stringByReplacingOccurrencesOfString:closeTagName with String:@”“]；
NSMUTABLeAttributeString*newText=[[NSMUTABLeAttributeString alloc]initWithString:newPlainText属性：@{NSFontAttributeName:font，NSParagraphStyleAttributeName:paragraphStyle}]；
newText=[自递归函数：newText:openTagName:font:paragraphStyle]；
[finalText-ReplaceCharactersRange:nsMakerRange（newOpenTagRange.location，newCloseTagRange.location-newOpenTagRange.location+newCloseTagRange.length）和AttributeString:newText]；
}
其他的
{
NSLog（@“找不到标记%@的结束标记”，openTagName）；
}
}
//格式化HTML标记
如果（[tag containssString:@“用于将HTML转换为
NSAttributedString
，则可以使用以下代码：

[[NSAttributedString alloc] initWithData:[htmlString dataUsingEncoding:NSUTF8StringEncoding] 
                             options:@{NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType,
                                       NSCharacterEncodingDocumentAttribute: @(NSUTF8StringEncoding)} 
                  documentAttributes:nil error:nil];

没有测试您的全部代码，但是快速查看，我猜如果不使用斜体和粗体，someText将无法工作。@Larme我已经测试了整个代码。一切正常。问题是在这样的情况下。
someText
.Where”Text“不会变为粗体。但是，如果它只是
一些文本，它就可以正常工作。替换
NSString*temp=[[finalText-string]stringByReplacingOccurrencesOfString:@“#####”with string:@“•\t”]；temp=[NSString stringWithFormat:@“\n%@”，temp]；[finalText-setAttributedString:[[NSAttributedString]initWithString:temp]]
与
[finalText ReplaceCharactersRange:[[finalText string]rangeOfString:@“######”]withString:@“•\t”]；
这应该解决问题的一部分。第二个问题在于：
NSMutableAttributedString*newText=[[NSMutableAttributedString alloc]initWithString:newPlainText属性：@{NSFontAttributeName:font，NSParagraphStyleAttributeName:paragraphStyle}]；
您正在覆盖字体，因此如果字体为“Arial Bold”，它将被参数中的字体覆盖。您好，只是一个小问题，为什么不能使用此解决方案？