iOS NSString如何过滤html标签

Object-C NSString 过滤html标签有以下两种方法：

- (NSString *)removeHTML:(NSString *)html {

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:@" "];

}

return html;

}
第二种，用NSString自带的Seprated自截断方法 
- (NSString *)removeHTML2:(NSString *)html{

NSArray *components = [html componentsSeparatedByCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"<>"]];

NSMutableArray *componentsToKeep = [NSMutableArray array];

for (int i = 0; i < [components count]; i = i + 2) {

[componentsToKeep addObject:[components objectAtIndex:i]];

}

NSString *plainText = [componentsToKeep componentsJoinedByString:@""];

return plainText;

}