地帶HTML標籤等從NSString的

Question

可能重複：
Remove HTML Tags from an NSString on the iPhone

我想知道剝離掉所有的HTML/JavaScript廣告等標記出一個NSString的最佳方法。

目前的解決方案，我用樹葉意見等標籤，這將是刪除它們的最好方法？

我知道解決方案，例如作者LibXML，但我希望有一些例子可以使用。

目前的解決方案：

- (NSString *)flattenHTML:(NSString *)html trimWhiteSpace:(BOOL)trim { 

    NSScanner *theScanner; 
    NSString *text = nil; 

    theScanner = [NSScanner scannerWithString:html]; 

    while ([theScanner isAtEnd] == NO) { 

     // find start of tag 
     [theScanner scanUpToString:@"<" intoString:NULL] ;     
     // find end of tag   
     [theScanner scanUpToString:@">" intoString:&text] ; 

     // replace the found tag with a space 
     //(you can filter multi-spaces out later if you wish) 
     html = [html stringByReplacingOccurrencesOfString: 
       [ NSString stringWithFormat:@"%@>", text] 
               withString:@""]; 
    } 

    // trim off whitespace 
    return trim ? [html stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] : html; 
} 

Answer 1

試試這個方法從一個字符串中刪除HTML標籤：

- (NSString *)stripTags:(NSString *)str 
{ 
    NSMutableString *html = [NSMutableString stringWithCapacity:[str length]]; 

    NSScanner *scanner = [NSScanner scannerWithString:str]; 
    scanner.charactersToBeSkipped = NULL; 
    NSString *tempText = nil; 

    while (![scanner isAtEnd]) 
    { 
     [scanner scanUpToString:@"<" intoString:&tempText]; 

     if (tempText != nil) 
      [html appendString:tempText]; 

     [scanner scanUpToString:@">" intoString:NULL]; 

     if (![scanner isAtEnd]) 
      [scanner setScanLocation:[scanner scanLocation] + 1]; 

     tempText = nil; 
    } 

    return html; 
}