我从网络服务获得 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>
我需要在 UILabel 中显示文本。
请帮忙
问问题
68272 次
11 回答
103
您可以使用属性文本在没有任何第三方库的情况下执行此操作。我相信它确实接受 HTML 片段，就像你得到的那样，但你可能希望将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);
不简洁，但你可以通过向 UILabel 添加一个类别来收拾烂摊子：
@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
…</p>
[someLabel setHtml:@"Be <b>bold!</b>"];
于 2014-01-25T20:45:43.277 回答
17
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
}
}
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
}
}
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
}
}
将其用作：
label.attributedText = yourStringVar.htmlAttributedString()
于 2016-09-08T21:46:56.847 回答
15
于 2013-04-08T08:21:58.980 回答
6
斯威夫特 4
我宁愿建议使用可失败的便利 init 扩展 NSAttributedString。String本质上不负责制作NSAttributedString。
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>")
于 2018-03-12T17:09:47.540 回答
3
来自：https ://stackoverflow.com/a/5581178/237838
将 HTML 转换为纯文本下载文件
并使用
stringByConvertingHTMLToPlainText在你的功能NSString
或者
您可以使用DTCoreText（以前称为 NSAttributedString Additions for HTML）。
于 2013-04-08T06:23:38.240 回答
2
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")
}
于 2016-07-25T21:30:05.563 回答
1
**// 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)
于 2018-10-05T08:11:48.620 回答
1
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")
}
于 2019-06-13T16:00:32.287 回答
0
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
}
于 2016-10-05T11:47:24.873 回答
0
最近我一直在处理部分 HTML 片段并将它们转换为具有添加属性的属性字符串。这是我的扩展版本
import Foundation
import UIKit
extension String {
func htmlAttributedString(attributes: [String : Any]? = .none) -> NSAttributedString? {
guard let data = self.data(using: String.Encoding.utf16, allowLossyConversion: false) else { return .none }
guard let html = try? NSMutableAttributedString(
data: data,
options: [NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType],
documentAttributes: .none) else { return .none }
html.setAttributes(attributes, range: NSRange(0..<html.length))
return html
}
}
我这样称呼它：
let attributes = [
NSForegroundColorAttributeName: UIColor.lightGray,
NSFontAttributeName : UIFont.systemFont(ofSize: 12).traits(traits: .traitItalic)
]
label?.attributedText = partialHTMLString.htmlAttributedString(attributes: attributes)
于 2016-10-10T10:28:21.380 回答
0
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。让我们开始并实现它。
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;
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.DocumentReadingOptionKey.documentType: NSAttributedString.DocumentType.html], documentAttributes: nil)
}
} catch {
}
var yourLabel = UILabel()
yourLabel.attributedText = attrStr
参考：https ://medium.com/@javedmultani16/html-text-in-uilabel-ios-f1e0760bcac5
于 2019-09-23T10:12:00.630 回答