Bra*_*oni 3 nsattributedstring ios swift
我正在使用 html 创建 NSAttributedString：
let htmlString = "<body style='padding-left:50px'><h1>Hello World</h1><div><a href=https://apple.com/offer/samsung-faq/>Click Here</a></div><p>This is a sample text</p><pre>This is also sample pre text</pre></body>"
在这里我使用扩展方法将其设置为 UILabel
someLabel.attributedText = htmlString.htmlToAttributedString
NSAttributedString 扩展：
extension String {
var htmlToAttributedString: NSAttributedString? {
guard let data = data(using: .utf8) else { return NSAttributedString() }
do {
return try NSAttributedString(data: data, options: [NSAttributedString.DocumentReadingOptionKey.documentType: NSAttributedString.DocumentType.html], documentAttributes: nil)
} catch {
return NSAttributedString()
}
}
}
在这里，我想要一个回调方法来检测 html 字符串中作为锚标记存在的链接。我将如何获得点击事件以及如何获得该事件回调中的网址？
请帮忙...
使用UITextView而不是，UILabel它具有将文本转换为超链接的属性。
您必须UIViewController确认UITextViewDelegate协议并实施textView(_:shouldInteractWith:in:interaction:。您的标准UITextView设置应该看起来像这样，不要忘记delegate和dataDetectorTypes。
@IBOutlet weak var txtView: UITextView!
// make IBOutlet of UITextView
txtTest.delegate = self
txtTest.isUserInteractionEnabled = true // default: true
txtTest.isEditable = false // default: true
txtTest.isSelectable = true // default: true
txtTest.dataDetectorTypes = [.link]
UITextViewDelegate方法shouldInteractWithURL：
func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange, interaction: UITextItemInteraction) -> Bool {
print("Link Selected!")
return true
}
HTML到NSAttributedString扩展：
extension String{
func convertHtml() -> NSAttributedString{
guard let data = data(using: .utf8) else { return NSAttributedString() }
do{
return try NSAttributedString(data: data, options: [NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType, NSCharacterEncodingDocumentAttribute: String.Encoding.utf8.rawValue], documentAttributes: nil)
}catch{
return NSAttributedString()
}
}
}
那么你可以像这样使用它。
let htmlString = "<body style='padding-left:50px'><h1>Hello World</h1><div><a href=https://apple.com/offer/samsung-faq/>Click Here</a></div><p>This is a sample text</p><pre>This is also sample pre text</pre></body>"
txtTest.attributedText = htmlString.convertHtml()
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