ios - NSPredicate in NSArray, contains number with "/" -


i filter nsmutablearray birthday date of user facebook. can use nspredicate ? nslog of "result" : 

"birthday": "05/24/1993",    "id": "xxxxxxxxxxx""

i "05/24/1993 getting birthday date , saves in nsarray : birthday.

here code :

- (void)viewdidload {     [super viewdidload];     fbrequest *friendrequest = [fbrequest requestforgraphpath:@"/me?fields=birthday"];     [ friendrequest startwithcompletionhandler:^(fbrequestconnection *connection,id result, nserror *error) {         [[nsuserdefaults standarduserdefaults]setobject:result forkey:@"birthdaydate"];         self.birthdayarray=[[nsuserdefaults standarduserdefaults]objectforkey:@"birthdaydate"];          nspredicate *apredicate = [nspredicate predicatewithformat:@"self contains[c] '/'"];         self.birthday = [self.birthdayarray filteredarrayusingpredicate:apredicate];          nslog(@"birthday : %@", self.birthday);      }

and my nslog of nsarray birthday error :

-[__nscfdictionary filteredarrayusingpredicate:]: unrecognized selector sent instance 0x10f80a570

your result nsdictionary instance , not nsarray instance. thats why error message since nsdictionary not support filteredarrayusingpredicate message.

you can nsarray containing keys nsdictionary:

nsarray *keys = [result allkeys];

filter array did :

nsarray *filteredkeys = [keys filteredarrayusingpredicate:[nspredicate predicatewithformat:@"self beginswith[c] 'b'"]];

and use filteredkeys extract required value(s) dictionary :

for (nsstring *key in filteredkeys) { // assuming dictionary keys string     id value = [result objectforkey:key];     nslog(@"current value key %@ = %@", key, value); }

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