无法使用NSHTMLTextDocumentType读取<strong>标记

Question

我的代码无法读取<strong>代码，而且我无法将其标记为粗体：

let txt = "`<p><em>The first day of your <strong>Kerala tour itinerary</strong> starts with a trip along the winding roads to the beautiful hill station of Munnar</em></p>\r\n<p>`Your holiday to the mesmerizing Munnar starts with `a&nbsp;`transfer from Cochin. Enjoy the picturesque hill-station as you drive through the serpentine roads surrounded by lush green hills. En route, visit the beautiful Cheeyappara, Valara, and Attukadu waterfalls and the spice plantations, as part of your `<strong>3 day Kerala tourism package itinerary</strong>.` Upon arrival, check-in to the hotel and relax for a while. Later, enjoy local sightseeing and marvel at the beauty all around. Mark an end to the first day of `<strong>Munnar tour package</strong>` with a comfortable overnight stay at the hotel.`&nbsp;</p>\r\n<p><strong>Distance from Cochin to Munnar:</strong>&nbsp;130 km (approx.)<br /><strong>Travel Time:</strong>&nbsp;4 hours (approx.)&nbsp;</p>`"




let dataValue = txt.data(using: String.Encoding.unicode,
                         allowLossyConversion: true)!
let optionaArr = [NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType]

let attrStr = try! NSAttributedString(data: dataValue,
                                       options: optionaArr,
                                       documentAttributes: nil)      
txtView.attributedText = attrStr

除了标签，我可以读取所有标签，如<p>, <em>和所有标签。 提前谢谢。

Answer 1

以下代码适用于我（swift 4.1＆amp; Xcode 9.3）

let txt = "`<p><em>The first day of your <strong>Kerala tour itinerary</strong> starts with a trip along the winding roads to the beautiful hill station of Munnar</em></p>\r\n<p>`Your holiday to the mesmerizing Munnar starts with `a&nbsp;`transfer from Cochin. Enjoy the picturesque hill-station as you drive through the serpentine roads surrounded by lush green hills. En route, visit the beautiful Cheeyappara, Valara, and Attukadu waterfalls and the spice plantations, as part of your `<strong>3 day Kerala tourism package itinerary</strong>.` Upon arrival, check-in to the hotel and relax for a while. Later, enjoy local sightseeing and marvel at the beauty all around. Mark an end to the first day of `<strong>Munnar tour package</strong>` with a comfortable overnight stay at the hotel.`&nbsp;</p>\r\n<p><strong>Distance from Cochin to Munnar:</strong>&nbsp;130 km (approx.)<br /><strong>Travel Time:</strong>&nbsp;4 hours (approx.)&nbsp;</p>`"

let dataValue = txt.data(using: String.Encoding.unicode,
                         allowLossyConversion: true)!

let attrStr = try! NSAttributedString(data: dataValue,
                       options: [.documentType: NSAttributedString.DocumentType.html],
                       documentAttributes: nil)
txtView.attributedText = attrStr

模拟器截图：