Question

我有一个html内容，我想在UILabel上显示。

NSAttributedString *attrStr = [[NSAttributedString alloc] initWithData:[htmlString dataUsingEncoding:NSUnicodeStringEncoding] options:@{ 
NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType} 
documentAttributes:nil error:nil];
return attrStr;

这适用于英语（LTR语义），但由于我想支持阿拉伯语，因此上述方法保留了属性字符串LTR。尽管使用此代码：self.view.semanticContentAttribute = UISemanticContentAttributeForceRightToLeft;

我已经尝试了

NSMutableAttributedString *mutableAttributedString = [[NSMutableAttributedString alloc]initWithData:[htmlString dataUsingEncoding:NSUnicodeStringEncoding] options:@{ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType} documentAttributes:nil error:nil];
[mutableAttributedString addAttribute:NSWritingDirectionAttributeName value:@[@(NSWritingDirectionRightToLeft | NSWritingDirectionOverride)] range:NSMakeRange(0, string.length)];
return mutableAttributedString;

还是一样。欢迎任何建议。感谢

Answer 1

希望对你有用右侧对齐!!

NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.lineBreakMode = NSLineBreakByWordWrapping;
paragraphStyle.alignment = NSTextAlignmentRight;

NSDictionary *attr = @{NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType,
                   NSCharacterEncodingDocumentAttribute: @(NSUTF8StringEncoding)};

NSError *error = nil;

NSMutableAttributedString *attributedText =
[[NSMutableAttributedString alloc]initWithData:[text dataUsingEncoding:NSUTF8StringEncoding] options:attr documentAttributes:nil error:&error];

[attributedText addAttribute:NSParagraphStyleAttributeName
                   value:paragraphStyle
                   range:NSMakeRange(0, attributedText.length)];
return attributedText;

Answer 2

问题与文本方向有关，但与对齐有关。奇怪...

最近出现了同样的问题，当来自html的属性字符串的语言方向不正确时。已使用html属性typeListOf = dotNET.System.Type.GetType("System.Collections.Generic.List`1") objType = dotNET.namespace.SpecificValueClass.zctor().GetType() paramTypes = dotNET.System.Array.CreateInstance(dotNET.System.Type.GetType("System.Type"), 1) paramTypes.SetValue(objType, 0) typeListOfString = typeListOf.MakeGenericType(paramTypes) newValue = dotNET.namespace.WattPeakValues.zctor() newValue.ID = 1 settings.SpecificValue.Add(newValue)修复。

请参阅：https://www.w3schools.com/tags/att_global_dir.asp

Answer 3

@BuLB JoBs的答案的

Swift 版本：

let yourHTMLString = "" // your string
let options: [NSAttributedString.DocumentReadingOptionKey : Any] = [
    .documentType: NSAttributedString.DocumentType.html,
    .characterEncoding: NSNumber(value: String.Encoding.utf8.rawValue)
]
guard let data = yourHTMLString.data(using: .utf8) else { return }
var attributedText: NSMutableAttributedString!
do {
    attributedText = try NSMutableAttributedString(data: data, options: options, documentAttributes: nil)
} catch { return }

// This attribute fixes the alignment problem for Arabic language
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.lineBreakMode = .byWordWrapping
paragraphStyle.alignment = .right
attributedText.addAttribute(NSAttributedString.Key.paragraphStyle, value: paragraphStyle, range: NSMakeRange(0, attributedText.length))

NSAttributedString - 为阿拉伯语添加写作方向

3 个答案: