NSString去掉html标签

- (NSString *)flattenHTML:(NSString *)html trimWhiteSpace:(BOOL)trim {
NSScanner *theScanner = [NSScanner scannerWithString:html];
NSString *text = nil;

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:@""];
//NSLog(@"html==%@",html);
}
html = [html stringByReplacingOccurrencesOfString:@" " withString:@""];
// trim off whitespace

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