在TextView中高效显示html内容
我正在使用这种方法，它工作得很好，但由于使用了NSHTMLTextDocumentType，所以有一个缓慢的回退，就像我做研究一样在TextView中高效显示html内容,html,ios,swift,swift3,uitextview,Html,Ios,Swift,Swift3,Uitextview,我正在使用这种方法，它工作得很好，但由于使用了NSHTMLTextDocumentType，所以有一个缓慢的回退，就像我做研究一样 do { let attributedOptions:[String: Any] = [ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType, NSCharacterEncodingDocumentAttribute: String.Encoding.utf8.ra
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)")
}
任何想法如何做它更快或另一种有效的方式做它 您是否尝试使用UIWebView来显示HTML内容 您可以根据自己的喜好从字符串或URL显示HTML 以下是从字符串显示HTML的示例：
string sHTMLContent = "<html><head><body><p>Hello World</p></body></head></html>";
m_WebView.LoadHtmlString(sHTMLContent , null);
string sHTMLContent=“Hello World”；
m_WebView.LoadHtmlString（sHTMLContent，null）；
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))
}
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)")
}
}
})
}
let queue:DispatchQueue=DispatchQueue（标签：“com.yourcompany.Process./html\u converter”）
queue.async
{
解析（“Hola mundo”，completionHandler:{（AttributedString:NSAttributedString？）->（Void）in
如果让AttributedString=AttributedString
{
DispatchQueue.main.async
{
打印（“str:：\（AttributedString）”）
}
}
})
}
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))
}
}
}
扩展字符串{
func html2StringAsync（ufontsize:CGFloat？=nil，color:UIColor？=nil，completionBlock:@escaping（nsattributestring）->（））{
让fontSize=fontSize±10
让fontColor=color？？UIColor.black
让font=“Avenir！重要”
让html=“+self+”“
如果let data=html.data（使用：String.Encoding.utf8，allowLossyConversion:true）{
DispatchQueue.main.async{
做{
let AttributeOptions:[String:Any]=[NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType，
NSCharacterEncodingDocumentAttribute:String.Encoding.utf8.rawValue]
让attrStr=try NSAttributedString（数据：数据，选项：attributedOptions，文档属性：nil）
完成块（attrStr）
}将let错误捕获为NSError{
打印（“htmo2String\（错误）”）
}
}
}否则{
completionBlock（NSAttribute字符串（字符串：self））
}
}
}