在 UILabel iphone 中显示 HTML 文本
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Display HTML text in UILabel iphone
提问by Khushboo
I am getting a HTML Response from a webservice Below is the HTML I am getting in response
我收到来自网络服务的 HTML 响应 下面是我收到的 HTML 响应
<p><strong>Topic</strong>Gud mrng.</p>
\n<p><strong>Hello Everybody</strong>: How are you.</p>
\n<p><strong>I am fine</strong>: 1 what about you.</p>
I need to display the text in UILabel.
我需要在 UILabel 中显示文本。
Please help
请帮忙
采纳答案by Swati
Use RTLabel library to convert the HTML text. I have used it several times. It works. Here is link to the library and a sample code.
使用 RTLabel 库转换 HTML 文本。我已经用过几次了。有用。这是库的链接和示例代码。
https://github.com/honcheng/RTLabel.
https://github.com/honcheng/RTLabel。
Hope I helped.
希望我有所帮助。
回答by Paul Cantrell
You can do it without any third-party libraries by using attributed text. I believe it does accept HTML fragments, like the one you're getting, but you may want to wrap it in a complete HTML document so that you can specify CSS:
您可以使用属性文本在没有任何第三方库的情况下完成此操作。我相信它确实接受 HTML 片段，就像你得到的那样，但你可能想把它包装在一个完整的 HTML 文档中，以便你可以指定 CSS：
static NSString *html =
@"<html>"
" <head>"
" <style type='text/css'>"
" body { font: 16pt 'Gill Sans'; color: #1a004b; }"
" i { color: #822; }"
" </style>"
" </head>"
" <body>Here is some <i>formatting!</i></body>"
"</html>";
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 300, 200)];
NSError *err = nil;
label.attributedText =
[[NSAttributedString alloc]
initWithData: [html dataUsingEncoding:NSUTF8StringEncoding]
options: @{ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType }
documentAttributes: nil
error: &err];
if(err)
NSLog(@"Unable to parse label text: %@", err);
Not concise, but you can mop up the mess by adding a category to UILabel:
不简洁，但您可以通过向 UILabel 添加类别来清理混乱：
@implementation UILabel (Html)
- (void) setHtml: (NSString*) html
{
NSError *err = nil;
self.attributedText =
[[NSAttributedString alloc]
initWithData: [html dataUsingEncoding:NSUTF8StringEncoding]
options: @{ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType }
documentAttributes: nil
error: &err];
if(err)
NSLog(@"Unable to parse label text: %@", err);
}
@end
…
…
[someLabel setHtml:@"Be <b>bold!</b>"];
回答by Oliver White
Swift 4: version
斯威夫特 4：版本
extension String {
func htmlAttributedString() -> NSAttributedString? {
guard let data = self.data(using: String.Encoding.utf16, allowLossyConversion: false) else { return nil }
guard let html = try? NSMutableAttributedString(
data: data,
options: [NSAttributedString.DocumentReadingOptionKey.documentType: NSAttributedString.DocumentType.html],
documentAttributes: nil) else { return nil }
return html
}
}
Swift 3: version
斯威夫特 3：版本
extension String {
func htmlAttributedString() -> NSAttributedString? {
guard let data = self.data(using: String.Encoding.utf16, allowLossyConversion: false) else { return nil }
guard let html = try? NSMutableAttributedString(
data: data,
options: [NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType],
documentAttributes: nil) else { return nil }
return html
}
}
Swift 2: version
斯威夫特 2：版本
extension String {
func htmlAttributedString() -> NSAttributedString? {
guard let data = self.dataUsingEncoding(NSUTF16StringEncoding, allowLossyConversion: false) else { return nil }
guard let html = try? NSMutableAttributedString(
data: data,
options: [NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType],
documentAttributes: nil) else { return nil }
return html
}
}
use it as:
将其用作：
label.attributedText = yourStringVar.htmlAttributedString()
回答by Paul B
Swift 4
斯威夫特 4
I would rather suggest to extend NSAttributedString with failable convenience init. Stringis not responsible for making NSAttributedStringby it's nature.
我宁愿建议使用可失败的便利初始化来扩展 NSAttributedString。String不负责制作NSAttributedString的性质。
extension NSAttributedString {
convenience init?(html: String) {
guard let data = html.data(using: String.Encoding.unicode, allowLossyConversion: false) else {
return nil
}
guard let attributedString = try? NSAttributedString(data: data, options: [NSAttributedString.DocumentReadingOptionKey.documentType: NSAttributedString.DocumentType.html], documentAttributes: nil) else {
return nil
}
self.init(attributedString: attributedString)
}
}
label.attributedText = NSAttributedString(html: "<span> Some <b>bold</b> and <a href='#/userProfile/uname'> Hyperlink </a> and so on </span>")
回答by Chirag Pipaliya
From: https://stackoverflow.com/a/5581178/237838
来自：https: //stackoverflow.com/a/5581178/237838
To convert HTML to plain text DownloadFile
将 HTML 转换为纯文本下载文件
and use
并使用
stringByConvertingHTMLToPlainTextfunction on your NSString
stringByConvertingHTMLToPlainText在您的功能 NSString
OR
或者
You can use DTCoreText(previously known as NSAttributedString Additions for HTML).
您可以使用DTCoreText（以前称为 HTML 的 NSAttributedString Additions）。
回答by Beninho85
Here is the swift 2 version:
这是 swift 2 版本：
let htmlStringData = NSString(string: "<strong>Your HTML String here</strong>").dataUsingEncoding(NSUTF8StringEncoding)
guard let html = htmlStringData else { return }
do {
let htmlAttrString = try NSAttributedString(data: html, options: [ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType], documentAttributes: nil)
yourLabel.attributedText = htmlAttrString
} catch {
print("An error occured")
}
回答by NSnik
The above answer in Swift 3:
Swift 3 中的上述答案：
var str = "<html> ... some html ... </html>"
let htmlStringData = NSString(string: str).data(using: String.Encoding.utf8.rawValue)
let html = htmlStringData
do {
let htmlAttrString = try? NSAttributedString(
data: html!,
options: [ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType],
documentAttributes: nil
)
agreementText.attributedText = htmlAttrString
} catch {
print("An error occured")
}
回答by Mr.Javed Multani
Sometimes we need to display HTML content on the screen by using UILabel. How to display the HTML content in UILabel we see that in this article. let's start and achieve it.
有时我们需要使用 UILabel 在屏幕上显示 HTML 内容。如何在 UILabel 中显示 HTML 内容我们在这篇文章中看到了。让我们开始并实现它。
Objective C:
目标 C：
NSString * htmlString = @"<html><body> <b> HTML in UILabel is here…. </b> </body></html>";
NSAttributedString * attrStr = [[NSAttributedString alloc] initWithData:[htmlString
dataUsingEncoding:NSUnicodeStringEncoding] options:@{ NSDocumentTypeDocumentAttribute:
NSHTMLTextDocumentType } documentAttributes:nil error:nil];
UILabel * yourLabel = [[UILabel alloc] init];
yourLabel.attributedText = attrStr;
Swift:
迅速：
var htmlString = “<html><body> <b> HTML in UILabel is here…. </b> </body></html>”
var attrStr: NSAttributedString? = nil
do {
if let data = htmlString.data(using: .unicode) {
attrStr = try NSAttributedString(data: data, options: [
NSAttributedString.DocumentAttributeKey.documentType: NSAttributedString.DocumentType.html.rawValue
], documentAttributes: nil)
}
} catch {
}
var yourLabel = UILabel()
yourLabel.attributedText = attrStr
Ref: https://medium.com/@javedmultani16/html-text-in-uilabel-ios-f1e0760bcac5
参考：https: //medium.com/@javedmultani16/html-text-in-uilabel-ios-f1e0760bcac5
回答by Venu Gopal Tewari
**// Swift 4 compatible | with setting of colour and font options:**
// add following extension to String:
func htmlAttributed(family: String?, size: CGFloat, color: UIColor) -> NSAttributedString? {
let sizeInPx = (size * 0.75)
do {
let htmlCSSString = "<style>" +
"html *" +
"{" +
"font-size: \(sizeInPx)pt !important;" +
"color: \(color.hexString ?? "#000000") !important;" +
"font-family: \(family ?? "SFUIText-Regular"), SFUIText !important;" +
"}</style> \(self)"
guard let data = htmlCSSString.data(using: String.Encoding.utf8) else {
return nil
}
return try NSAttributedString(data: data,
options: [.documentType: NSAttributedString.DocumentType.html,
.characterEncoding: String.Encoding.utf8.rawValue],
documentAttributes: nil)
} catch {
print("error: ", error)
return nil
}
}
// add following extension to UIColor:
extension UIColor{
var hexString:String? {
if let components = self.cgColor.components {
let r = components[0]
let g = components[1]
let b = components[2]
return String(format: "%02X%02X%02X", (Int)(r * 255), (Int)(g * 255), (Int)(b * 255))
}
return nil
}
}
// Sample Use:
yourLabel.attributedText = locationTitle.htmlAttributed(family: yourLabel.font.fontName,
size: yourLabel.font.pointSize,
color: yourLabel.textColor)
回答by Chowdhury Md Rajib Sarwar
The above answer in Swift 3:
Swift 3 中的上述答案：
func htmlAttributedString() -> NSAttributedString? {
guard let data = self.data(using: String.Encoding.utf16, allowLossyConversion: false) else { return nil }
guard let html = try? NSMutableAttributedString(
data: data,
options: [NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType],
documentAttributes: nil) else { return nil }
return html
}
