iOS实现去除html标签的方法汇总
时间：2021-04-16 08:22:23|栏目：iOS代码|点击： 次
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
-(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;
}
也可以使用正则去掉
-(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;
}
还可以转换为富文本
+ (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;
}
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
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
}
}
总结
