-(NSString *)filterHTML:(NSString *)html

{

NSScanner * scanner = [NSScanner scannerWithString:html];

NSString * text = nil;

while([scanner isAtEnd]==NO)

{

//找到标签的起始位置

[scanner scanUpToString:@"<" intoString:nil];

//找到标签的结束位置

[scanner scanUpToString:@">" intoString:&text];

//替换字符

html = [html stringByReplacingOccurrencesOfString:[NSString stringWithFormat:@"%@>",text] withString:@""];

}

return html;

}