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从nsmutableattributedstring中删除项目符号

nsattributedstring uilabel string swift

r3dm4n santosh kumar behera · 技术社区 · 6 年前

我正试图从nsmutableattributedstring中删除–bulletpoints。

我可以用.replacingoccurrences(of:text,with:“)删除“单击打开图像…”文本,但无论我做什么,项目符号都不会消失。我不认为这是正确的解决办法。

我正在一个标签的attributeText上调用下面的扩展名前任:

label.attributedText = someString.htmlAttributedString()

有什么建议吗?

extension String {

    func htmlAttributedString() -> NSMutableAttributedString {
        guard let data = self.data(using: String.Encoding.utf8, allowLossyConversion: false) else { return NSMutableAttributedString() }

        guard let formattedString =
            try? NSMutableAttributedString(
                data: data,
                options: [
                    .documentType: NSAttributedString.DocumentType.html,
                    .characterEncoding: String.Encoding.utf8.rawValue],

                documentAttributes: nil)
            else { return NSMutableAttributedString() }

        let bulletPoint: String = "\u{2022}"
        let attributedString = NSMutableAttributedString(string: bulletPoint)
        formattedString.enumerateAttributes(in: NSRange(0..<attributedString.length), options: []) { (attributes, range, _) -> Void in
            for (attribute, _) in attributes {
                formattedString.removeAttribute(attribute, range: range)
            }
        }

        formattedString.trimCharactersInSet(charSet: NSCharacterSet.whitespacesAndNewlines as NSCharacterSet)

        return formattedString
    }
}

HTML字符串如下所示:

{
    NSColor = "kCGColorSpaceModelRGB 0 0 0 1 ";
    NSFont = "<UICTFont: 0x7fb06e91edb0> font-family: \"Times New Roman\"; font-weight: normal; font-style: normal; font-size: 12.00pt";
    NSKern = 0;
    NSParagraphStyle = "Alignment 3, LineSpacing 0, ParagraphSpacing 12, ParagraphSpacingBefore 0, HeadIndent 0, TailIndent 0, FirstLineHeadIndent 0, LineHeight 15/0, LineHeightMultiple 0, LineBreakMode 0, Tabs (\n), DefaultTabInterval 36, Blocks (\n), Lists (\n), BaseWritingDirection 0, HyphenationFactor 0, TighteningForTruncation NO, HeaderLevel 0";
    NSStrokeColor = "kCGColorSpaceModelRGB 0 0 0 1 ";
    NSStrokeWidth = 0;
}   â¢   {
    NSColor = "kCGColorSpaceModelRGB 0 0 0.933333 1 ";
    NSFont = "<UICTFont: 0x7fb06e93e600> font-family: \"TimesNewRomanPS-BoldMT\"; font-weight: bold; font-style: normal; font-size: 12.00pt";
    NSParagraphStyle = "Alignment 0, LineSpacing 0, ParagraphSpacing 0, ParagraphSpacingBefore 0, HeadIndent 36, TailIndent 0, FirstLineHeadIndent 0, LineHeight 15/0, LineHeightMultiple 0, LineBreakMode 0, Tabs (\n    11L,\n    36N\n), DefaultTabInterval 36, Blocks (null), Lists (\n    \"NSTextList 0x60c000442160 format <{disc}>\"\n), BaseWritingDirection 0, HyphenationFactor 0, TighteningForTruncation NO, HeaderLevel 0";
}Click to open image!{
    NSColor = "kCGColorSpaceModelRGB 0 0 0.933333 1 ";
    NSFont = "<UICTFont: 0x7fb06e93e600> font-family: \"TimesNewRomanPS-BoldMT\"; font-weight: bold; font-style: normal; font-size: 12.00pt";
    NSKern = 0;
    NSLink = "applewebdata://AC01F520-17C4-4F1A-BB81-0A54CBE9C2F6/images/galerie/fotoreportaj-faleza-inferioara-galati/01.jpg";
    NSParagraphStyle = "Alignment 0, LineSpacing 0, ParagraphSpacing 0, ParagraphSpacingBefore 0, HeadIndent 36, TailIndent 0, FirstLineHeadIndent 0, LineHeight 15/0, LineHeightMultiple 0, LineBreakMode 0, Tabs (\n    11L,\n    36N\n), DefaultTabInterval 36, Blocks (null), Lists (\n    \"NSTextList 0x60c000442160 format <{disc}>\"\n), BaseWritingDirection 0, HyphenationFactor 0, TighteningForTruncation NO, HeaderLevel 0";
    NSStrokeColor = "kCGColorSpaceModelRGB 0 0 0.933333 1 ";
    NSStrokeWidth = 0;
    NSUnderline = 1;
} Mareste imaginea {
    NSColor = "kCGColorSpaceModelRGB 0 0 0.933333 1 ";
    NSFont = "<UICTFont: 0x7fb06e91edb0> font-family: \"Times New Roman\"; font-weight: normal; font-style: normal; font-size: 12.00pt";
    NSKern = 0;
    NSLink = "applewebdata://AC01F520-17C4-4F1A-BB81-0A54CBE9C2F6/images/galerie/fotoreportaj-faleza-inferioara-galati/01.jpg";
    NSParagraphStyle = "Alignment 0, LineSpacing 0, ParagraphSpacing 0, ParagraphSpacingBefore 0, HeadIndent 36, TailIndent 0, FirstLineHeadIndent 0, LineHeight 15/0, LineHeightMultiple 0, LineBreakMode 0, Tabs (\n    11L,\n    36N\n), DefaultTabInterval 36, Blocks (null), Lists (\n    \"NSTextList 0x60c000442160 format <{disc}>\"\n), BaseWritingDirection 0, HyphenationFactor 0, TighteningForTruncation NO, HeaderLevel 0";
    NSStrokeColor = "kCGColorSpaceModelRGB 0 0 0.933333 1 ";
    NSStrokeWidth = 0;
    NSUnderline = 1;
}

这就是它的样子

.replacingoccurrences(共个:“,共个:”)

.replacingoccurrences(属于:“单击打开图像!”,带有:“)

.重发(指:“Mareste Imaginea”,带:“)

1 回复 | 直到 6 年前

Larme 6 年前

在你现在的代码中,我完全不知道该怎么做:

let bulletPoint: String = "\u{2022}"
let attributedString = NSMutableAttributedString(string: bulletPoint)
formattedString.enumerateAttributes(in: NSRange(0..<attributedString.length), options: []) { (attributes, range, _) -> Void in
    for (attribute, _) in attributes {
        formattedString.removeAttribute(attribute, range: range)
    }
}

你使用 NSRange(0..<attributedString.length) ,如果 formattedString 短于 attributedString 是的。这是一个要点,所以你不应该有问题,但仍然。它背后的目标让我摸不着头脑。

子弹 â¢ 或 \u{2022} 在解析之后创建,因此需要解析 formattedString.string ,你能做什么:

let regex = try! NSRegularExpression(pattern: "\\s\u{2022}\\s", options: [])
let matches = regex.matches(in: formattedString.string, options: [], range: NSMakeRange(0, formattedString.string.utf16.count))
matches.reversed().forEach { formattedString.replaceCharacters(in: $0.range, with: "")}

我不明白你是否只想删除子弹或其他文字(其他人尝试 .replacingOccurrences(of: "Click to open image!", with: "") 只是想看看你是否真的能够到达那一行并移除子字符串。