我正在使用这种方式,它工作正常,但由于我在研究时使用NSHTMLTextDocumentType而回退缓慢
do {
let attributedOptions:[String: Any] = [
NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType,
NSCharacterEncodingDocumentAttribute: String.Encoding.utf8.rawValue]
let date = html.data(using: String.Encoding.utf8, allowLossyConversion: true)!
return try NSAttributedString(data: data, options: attributedOptions , documentAttributes: nil)
} catch let error as NSError {
print("htmo2String (error)")
}
任何想法如何更快地做到这一点或其他有效的方法!
也许您可以在队列上执行解析代码...
func parse(_ html: String, completionHandler: @escaping (_ attributedText: NSAttributedString?) -> (Void)) -> Void
{
let htmlData = text.data(using: String.Encoding.utf8, allowLossyConversion: false)
let options: [String: AnyObject] = [
NSDocumentTypeDocumentAttribute : NSHTMLTextDocumentType as AnyObject
]
completionHandler(try? NSAttributedString(data: htmlData!, options: options, documentAttributes: nil))
}
现在调用函数并等待响应...
let queue: DispatchQueue = DispatchQueue(label: "com.yourcompany.Process./html_converter")
queue.async
{
parse("<p>¡Hola mundo</p>", completionHandler: { (attributtedString: NSAttributedString?) -> (Void) in
if let attributtedString = attributtedString
{
DispatchQueue.main.async
{
print("str:: (attributtedString)")
}
}
})
}
您是否尝试过使用 UIWebView 来呈现 HTML 内容?
您可以根据需要显示字符串或 URL 中的 HTML。
下面是一个从字符串显示 HTML 的示例:
string sHTMLContent = "<html><head><body><p>Hello World</p></body></head></html>";
m_WebView.LoadHtmlString(sHTMLContent , null);
然后,可以将 Web 视图的大小设置为与具有约束的文本视图相等。如果需要,Web 视图将自动滚动。
最终字符串扩展,以异步@Adolfo有效地显示html字符串
具有更改字体和颜色^_^的能力
extension String {
func html2StringAsync(_ fontSize: CGFloat? = nil, color: UIColor? = nil, completionBlock:@escaping (NSAttributedString) ->()) {
let fontSize = fontSize ?? 10
let fontColor = color ?? UIColor.black
let font = "Avenir !important"
let html = "<div style="font-family:(font); font-size:(fontSize)pt; color:(fontColor.hexString);">" + self + "</div>"
if let data = html.data(using: String.Encoding.utf8, allowLossyConversion: true){
DispatchQueue.main.async {
do {
let attributedOptions:[String: Any] = [NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType,
NSCharacterEncodingDocumentAttribute: String.Encoding.utf8.rawValue]
let attrStr = try NSAttributedString(data: data, options: attributedOptions , documentAttributes: nil)
completionBlock(attrStr)
} catch let error as NSError {
print("htmo2String (error)")
}
}
}else{
completionBlock(NSAttributedString(string: self))
}
}
}