ios - Converting string into dictionary appending special characters? -

i have string contains json array. mapping string key in dictionary. doing adds "/" in string. again, i'm converting string further nsdata. please me out.

code generate json string:

int = 0;  nsmutablearray *contacts = [nsmutablearray array]; (i = 0; < all_contacts.count; i++) {   [contacts addobject:@{@"phone" : all_contacts[i]}]; }  nserror *error; nsdata *jsondata = [nsjsonserialization datawithjsonobject:contacts                                                    options:0                                                      error:&error]; if (!jsondata) {   //error here } else {   nsstring *jsonstring = [[nsstring alloc] initwithdata:jsondata                                                encoding:nsutf8stringencoding]; } 

before converting string nsdictionary

[{"phone":5555648583},{"phone":5554787672},{"phone":952365285},{"phone":5555228243},{"phone":5557664823},{"phone":5556106679}] 

after converting nsdictionary

{     key = "[{\"phone\":5555648583},{\"phone\":5554787672},{\"phone\":952365285},{\"phone\":5555228243},{\"phone\":5557664823},{\"phone\":5556106679}]"; } 

i want convert nsdictionary nsdata without appending "/" characters?

the backslash characters inserted presentation only. if type po jsonstring in console, verify there aren't any.