ios-Swift：以标签或textVi显示HTML数据

我有一些HTML数据，其中包含标题，段落，图像和列表标签。

有没有一种方法可以在一个UITextView或UILabel中显示此数据？

12个解决方案

146 votes

对于Swift 4：

extension String {

var htmlToAttributedString: NSAttributedString? {

guard let data = data(using: .utf8) else { return NSAttributedString() }

do {

return try NSAttributedString(data: data, options: [.documentType: NSAttributedString.DocumentType.html, .characterEncoding:String.Encoding.utf8.rawValue], documentAttributes: nil)

} catch {

return NSAttributedString()

}

}

var htmlToString: String {

return htmlToAttributedString?.string ?? ""

}

}

然后，每当您要将HTML文本放入UITextView时，请使用：

textView.attributedText = htmlText.htmlToAttributedString

Roger Carvalho answered 2019-11-15T18:40:49Z

34 votes

这是Swift 3版本：

private func getHtmlLabel(text: String) -> UILabel {

let label = UILabel()

label.numberOfLines = 0

label.lineBreakMode = .byWordWrapping

label.attributedString = stringFromHtml(string: text)

return label

}

private func stringFromHtml(string: String) -> NSAttributedString? {

do {

let data = string.data(using: String.Encoding.utf8, allowLossyConversion: true)

if let d = data {

let str = try NSAttributedString(data: d,

options: [NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType],

documentAttributes: nil)

return str

}

} catch {

}

return nil

}

我在这里找到其他一些答案的问题，花了我一些时间才能正确解决。 我设置了换行模式和行数，以便当HTML跨多行时标签的大小适当。

garie answered 2019-11-15T18:41:20Z

13 votes

添加此扩展名以将您的html代码转换为常规字符串：

extension String {

var html2AttributedString: NSAttributedString? {

guard

let data = dataUsingEncoding(NSUTF8StringEncoding)

else { return nil }

do {

return try NSAttributedString(data: data, options: [NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType,NSCharacterEncodingDocumentAttribute:NSUTF8StringEncoding], documentAttributes: nil)

} catch let error as NSError {

print(error.localizedDescription)

return nil

}

}

var html2String: String {

return html2AttributedString?.string ?? ""

}

}

然后在UITextView或UILabel中显示String

textView.text = yourString.html2String或

label.text = yourString.html2String

Himanshu answered 2019-11-15T18:41:56Z

7 votes

Swift 3.0

var attrStr = try! NSAttributedString(

data: "text".data(using: String.Encoding.unicode, allowLossyConversion: true)!,

options: [ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType],

documentAttributes: nil)

label.attributedText = attrStr

Ved Rauniyar answered 2019-11-15T18:42:15Z

7 votes

此后，我在更改文本属性时遇到问题，我可以看到其他人问为什么...

因此最好的答案是将扩展名与NSMutableAttributedString结合使用：

extension String {

var htmlToAttributedString: NSMutableAttributedString? {

guard let data = data(using: .utf8) else { return nil }

do {

return try NSMutableAttributedString(data: data,

options: [.documentType: NSMutableAttributedString.DocumentType.html,

.characterEncoding: String.Encoding.utf8.rawValue],

documentAttributes: nil)

} catch let error as NSError {

print(error.localizedDescription)

return nil

}

}

}

然后您可以通过以下方式使用它：

if let labelTextFormatted = text.htmlToAttributedString {

let textAttributes = [

NSAttributedStringKey.foregroundColor: UIColor.white,

NSAttributedStringKey.font: UIFont.boldSystemFont(ofSize: 13)

] as [NSAttributedStringKey: Any]

labelTextFormatted.addAttributes(textAttributes, range: NSRange(location: 0, length: labelTextFormatted.length))

self.contentText.attributedText = labelTextFormatted

}

Kassy Barb answered 2019-11-15T18:42:52Z

6 votes

我正在使用这个：

extension UILabel {

func setHTML(html: String) {

do {

let attributedString: NSAttributedString = try NSAttributedString(data: html.data(using: .utf8)!, options: [NSDocumentTypeDocumentAttribute : NSHTMLTextDocumentType], documentAttributes: nil)

self.attributedText = attributedString

} catch {

self.text = html

}

}

}

Nikolay Khramchenko answered 2019-11-15T18:43:11Z

4 votes

斯威夫特3

extension String {

var html2AttributedString: NSAttributedString? {

guard

let data = data(using: String.Encoding.utf8)

else { return nil }

do {

return try NSAttributedString(data: data, options: [NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType,NSCharacterEncodingDocumentAttribute:String.Encoding.utf8], documentAttributes: nil)

} catch let error as NSError {

print(error.localizedDescription)

return nil

}

}

var html2String: String {

return html2AttributedString?.string ?? ""

}

}

Alex Morel answered 2019-11-15T18:43:30Z

2 votes

试试这个：

let label : UILable! = String.stringFromHTML("html String")

func stringFromHTML( string: String?) -> String

{

do{

let str = try NSAttributedString(data:string!.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true

)!, options:[NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType, NSCharacterEncodingDocumentAttribute: NSNumber(unsignedLong: NSUTF8StringEncoding)], documentAttributes: nil)

return str.string

} catch

{

print("html error\n",error)

}

return ""

}

希望对您有所帮助。

Iyyappan Ravi answered 2019-11-15T18:43:55Z

1 votes

如果您想要HTML，图像和列表，则UILabel不支持此功能。 但是，我发现YYText可以解决问题。

Christopher Kevin Howell answered 2019-11-15T18:44:19Z

1 votes

在UITextView或UILabel中无法显示图像和文本段落，为此，您必须使用UIWebView。

只需将项目添加到情节提要中，链接到您的代码，然后调用它以加载URL。

OBJ-C

NSString *fullURL = @"http://conecode.com";

NSURL *url = [NSURL URLWithString:fullURL];

NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];

[_viewWeb loadRequest:requestObj];

迅速

let url = NSURL (string: "http://www.sourcefreeze.com");

let requestObj = NSURLRequest(URL: url!);

viewWeb.loadRequest(requestObj);

分步教程。[http://sourcefreeze.com/uiwebview-example-using-swift-in-ios/]

Ulysses answered 2019-11-15T18:45:05Z

1 votes

上面的答案在这里是Swift 4.2

extension String {

var htmlToAttributedString: NSAttributedString? {

guard

let data = self.data(using: .utf8)

else { return nil }

do {

return try NSAttributedString(data: data, options: [

NSAttributedString.DocumentReadingOptionKey.documentType: NSAttributedString.DocumentType.html,

NSAttributedString.DocumentReadingOptionKey.characterEncoding: String.Encoding.utf8.rawValue

], documentAttributes: nil)

} catch let error as NSError {

print(error.localizedDescription)

return nil

}

}

var htmlToString: String {

return htmlToAttributedString?.string ?? ""

}

}

Stephen Chen answered 2019-11-15T18:45:31Z

-1 votes

如果您具有内含HTML代码的字符串，则可以使用：

extension String {

var utfData: Data? {

return self.data(using: .utf8)

}

var htmlAttributedString: NSAttributedString? {

guard let data = self.utfData else {

return nil

}

do {

return try NSAttributedString(data: data,

options: [

.documentType: NSAttributedString.DocumentType.html,

.characterEncoding: String.Encoding.utf8.rawValue

], documentAttributes: nil)

} catch {

print(error.localizedDescription)

return nil

}

}

var htmlString: String {

return htmlAttributedString?.string ?? self

}

}

并以您的代码使用：

label.text = "something".htmlString

Pedro Menezes answered 2019-11-15T18:46:01Z