html - ios - 在保留 HTML 属性的同时编辑 NSMutableAttributedString

Question

我有一个 HTML 格式的文本，我想在我的 iOS 应用程序中使用这个文本。我正在使用 NSAttributedString通过 HTML 标签(例如 <strong></strong>)维护文本的属性。问题是，[NSAttributedString initWithData:options:documentAttributes:error:]将默认字体转换为 Times New Roman 的文本。我尝试使用 NSMutableAttributedString将字体更改为 [UIFont systemFontOfSize:] , 但它破坏了它通过 HTML 标签拥有的属性。我该如何解决这个问题？有没有办法更改默认字体？

编辑:例如，我要解析的文本如下:

"Activities are typically <strong>directed at a group of people</strong> rather than individuals"

下面的代码将其解析为带有 Times New Roman 的 HTML 文本:

NSMutableAttributedString* itemWithStyle = [[NSMutableAttributedString alloc] initWithData:[text dataUsingEncoding:NSUTF8StringEncoding] options:@{NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType, NSCharacterEncodingDocumentAttribute: @(NSUTF8StringEncoding) documentAttributes:nil error:nil];

输出:

Activities are typically directed at a group of people rather than individuals

打印时的样子:

Activities are typically {
    NSColor = "UIDeviceRGBColorSpace 0 0 0 1";
    NSFont = "<UICTFont: 0xf1b34e0> font-family: \"Times New Roman\"; font-weight: normal; font-style: normal; font-size: 12.00pt";
    NSKern = 0;
    NSParagraphStyle = "Alignment 4, LineSpacing 0, ParagraphSpacing 0, ParagraphSpacingBefore 0, HeadIndent 0, TailIndent 0, FirstLineHeadIndent 0, LineHeight 0/0, LineHeightMultiple 0, LineBreakMode 0, Tabs (\n), DefaultTabInterval 36, Blocks (null), Lists (null), BaseWritingDirection 0, HyphenationFactor 0, TighteningFactor 0, HeaderLevel 0";
    NSStrokeColor = "UIDeviceRGBColorSpace 0 0 0 1";
    NSStrokeWidth = 0;
}directed at a group of people{
    NSColor = "UIDeviceRGBColorSpace 0 0 0 1";
    NSFont = "<UICTFont: 0x9a8aa10> font-family: \"TimesNewRomanPS-BoldMT\"; font-weight: bold; font-style: normal; font-size: 12.00pt";
    NSKern = 0;
    NSParagraphStyle = "Alignment 4, LineSpacing 0, ParagraphSpacing 0, ParagraphSpacingBefore 0, HeadIndent 0, TailIndent 0, FirstLineHeadIndent 0, LineHeight 0/0, LineHeightMultiple 0, LineBreakMode 0, Tabs (\n), DefaultTabInterval 36, Blocks (null), Lists (null), BaseWritingDirection 0, HyphenationFactor 0, TighteningFactor 0, HeaderLevel 0";
    NSStrokeColor = "UIDeviceRGBColorSpace 0 0 0 1";
    NSStrokeWidth = 0;
} rather than individuals{
    NSColor = "UIDeviceRGBColorSpace 0 0 0 1";
    NSFont = "<UICTFont: 0xf1b34e0> font-family: \"Times New Roman\"; font-weight: normal; font-style: normal; font-size: 12.00pt";
    NSKern = 0;
    NSParagraphStyle = "Alignment 4, LineSpacing 0, ParagraphSpacing 0, ParagraphSpacingBefore 0, HeadIndent 0, TailIndent 0, FirstLineHeadIndent 0, LineHeight 0/0, LineHeightMultiple 0, LineBreakMode 0, Tabs (\n), DefaultTabInterval 36, Blocks (null), Lists (null), BaseWritingDirection 0, HyphenationFactor 0, TighteningFactor 0, HeaderLevel 0";
    NSStrokeColor = "UIDeviceRGBColorSpace 0 0 0 1";
    NSStrokeWidth = 0;
}

当我添加以下代码时，文本失去了它的属性。

[itemWithStyle addAttributes:@{NSFontAttributeName: [UIFont systemFontOfSize:16]} range:NSMakeRange(0, itemWithStyle.length)];

Answer 1

我遇到了同样的问题并解决了这个问题:

NSMutableString * content = [[NSMutableString alloc] 
initWithString:@"<div style='font-size:15px; font-family: HelveticaNeue'>"];
[content appendString:self.article.content];
[content appendString:@"</div>"];

不确定是否有“更好”的方法，但这对我有用