objective c - Convert HTML to NSAttributedString in iOS with input type checkbox -

i have problem nsattributedstring. want show checkbox nsattributedstring image :

but can't show that:

this code:

nsstring *txt = @"<br><input type='checkbox' >checkbox<br><br>"; nsattributedstring *att = [[nsattributedstring alloc] initwithdata:[txt datausingencoding:nsutf8stringencoding]                                                                options:@{nsdocumenttypedocumentattribute:nshtmltextdocumenttype,                                                nscharacterencodingdocumentattribute: @(nsutf8stringencoding)}                           documentattributes:nil error:nil]; lbltitle.attributedtext = att;