前言
我们在一些开发中,很有必要过滤掉用户输入的文本中的HTML标签以防范XSS攻击,本文将详细介绍关于iOS去除html标签的相关内容,分享出来供大家参考学习,下面话不多说了,来一起看看详细的介绍吧。
请求接口返回的数据里包含html标签,OC中去掉的方法之前做过,代码如下
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-(NSString *)filterHTML:(NSString *)html{
NSScanner * scanner = [NSScanner scannerWithString:html];
NSString * text = nil;
while ([scanner isAtEnd]==NO)
{
[scanner scanUpToString:@ "<" intoString:nil];
[scanner scanUpToString:@ ">" intoString:&text];
html = [html stringByReplacingOccurrencesOfString:[NSString stringWithFormat:@ "%@>" ,text] withString:@ "" ];
}
return html;
}
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也可以使用正则去掉
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-(NSString *)getZZwithString:(NSString *)string{
NSRegularExpression *regularExpretion=[NSRegularExpression regularExpressionWithPattern:@ "<[^>]*>|\n"
options:0
error:nil];
string=[regularExpretion stringByReplacingMatchesInString:string options:NSMatchingReportProgress range:NSMakeRange(0, string.length) withTemplate:@ "" ];
return string;
}
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还可以转换为富文本
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+ (NSMutableAttributedString *)praseHtmlStr:(NSString *)htmlStr {
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithData:[htmlStr dataUsingEncoding:NSUnicodeStringEncoding] options:@{NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType,NSCharacterEncodingDocumentAttribute :@(NSUTF8StringEncoding)} documentAttributes:nil error:nil];
[attributedString addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:13] range:NSMakeRange(0, attributedString.length)];
[attributedString addAttribute:NSForegroundColorAttributeName value:CommonColor(Color333333) range:NSMakeRange(0, attributedString.length)];
return attributedString;
}
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但是这次使用的是swift,来看我收集的几种方法,其实都差不多
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func removeHTML(htmlString : String)->String{
return htmlString.replacingOccurrences(of: "<[^>]+>" , with: "" , options: .regularExpression, range: nil)
}
extension String {
func deleteHTMLTag(tag:String) -> String {
return self.replacingOccurrences(of: "(?i)</?\(tag)\\b[^<]*>" , with: "" , options: .regularExpression, range: nil)
}
func deleteHTMLTags(tags:[String]) -> String {
var mutableString = self
for tag in tags {
mutableString = mutableString.deleteHTMLTag(tag: tag)
}
return mutableString
}
///去掉字符串标签
mutating func filterHTML() -> String?{
let scanner = Scanner(string: self)
var text: NSString?
while !scanner.isAtEnd {
scanner.scanUpTo( "<" , into: nil)
scanner.scanUpTo( ">" , into: &text)
self = self.replacingOccurrences(of: "\(text == nil ? " " : text!)>" , with: "" )
}
return self
}
}
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总结
以上就是这篇文章的全部内容了,本文还有许多不足,希望本文的内容对大家的学习或者工作具有一定的参考学习价值,如果有疑问大家可以留言交流,谢谢大家对服务器之家的支持。
原文链接:https://blog.duicode.com/2458.html