NSPredicate code crashing on NSMutableArray ? objective c

Question

this is my NSMutableArray format and this is working fine and am getting correct response also

[
    {
        "status":"not completed",
        "rating":2 
    },{
        "status":"completed",
        "rating":2 
    },{
        "status":"not completed",
        "rating":"<null>" 
    },{
        "status":"completed",
        "rating":"<null>"
    },{
        "status":"not completed",
        "rating":"<null>" 
    }
]

and code is

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"self.status == 'completed' and self.rating == NULL"];

NSArray *arr = [order filteredArrayUsingPredicate:predicate];

but in some case my NSMutableArray may change to this form

[
    {
        "status":not completed,
        "rating":2 
    },{
        "status":not completed,
        "rating":2 
    },{
        "status":not completed,
        "rating":4 
    }
]

now my code is crashing here

NSArray *arr = [order filteredArrayUsingPredicate:predicate];

i have attached console screen here

crash

THERE WAS A MISTAKE IN CODE LIKE before it was NSDictionary *jorder = response; to use predicate i converted this to NSMutableArray *jorder = response;

Crash saying

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFDictionary filteredArrayUsingPredicate:]: unrecognized selector sent to instance 0x13f209b60'
*** First throw call stack:
(0x1841e6db0 0x18384bf80 0x1841edc4c 0x1841eabec 0x1840e8c5c 0x1001354ac 0x100135278 0x1000aaf4c 0x1001549cc 0x100e55a7c 0x100e55a3c 0x100e5b4e4 0x18419cd50 0x18419abb8 0x1840c4c50 0x1859ac088 0x1893ae088 0x100125798 0x183c628b8)
libc++abi.dylib: terminating with uncaught exception of type NSException

try this rating.length <= 0...instead of checking it with NULL. — Surjeet Rajput, Jul 16 '16 at 08:31
but crash may be due to there is no object with status "completed" — Bangalore, Jul 16 '16 at 09:18
@Bangalore Have you check after removing `self.rating` condition from predicate? — Nirav D, Jul 16 '16 at 09:49
@Bangalore i know that that's why i want you to check that, the problem here is that your server return null object if rating is 0. — Nirav D, Jul 16 '16 at 10:01
I am saying that it doesn't get any rating that why you are getting null value for that object. — Nirav D, Jul 16 '16 at 10:06
@Bangalore balkaransingh's code working fine ,please check this... — Ajharudeen khan, Jul 16 '16 at 11:05
@Bangalore: just small change will work without crash NSPredicate *predicate = [NSPredicate predicateWithFormat:@"self.status == 'completed' and self.rating = NULL"]; — kaushal, Jul 16 '16 at 12:55

balkaran singh · Answer 1 · 2016-07-16T09:47:18.960

0

plz use this code

 NSPredicate *predicate = [NSPredicate predicateWithFormat:@"self.status == 'completed' AND self.rating == %@",@"<null>"];

NSArray *arr = [order filteredArrayUsingPredicate:predicate];

Result

in my debug its show result

edited Jul 16 '16 at 09:47

answered Jul 16 '16 at 08:58

balkaran singh

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@Bangalore there must be other reason of crash see my updated answer. – balkaran singh Jul 16 '16 at 09:34
you are not checking my question , dude i have only these [ { "status":"not completed", "rating":2 },{ "status":"not completed", "rating":2 },{ "status":"not completed", "rating":4 } ] i dont know how u r getting completed in this – Bangalore Jul 16 '16 at 09:36
@Bangalore i check from your both array wait i show other array response. – balkaran singh Jul 16 '16 at 09:37
@Bangalore Because balkaran added as string and you getting nil object in your response from api. – Nirav D Jul 16 '16 at 09:39
@Nirav its ur code which is crashing from previous question – Bangalore Jul 16 '16 at 09:41
if you remove `self.rating` condition from the predicate it will work properly check it once. – Nirav D Jul 16 '16 at 09:43
@Bangalore see i use your array and get 0 result without crash. – balkaran singh Jul 16 '16 at 09:49
i removed rating from my existing code then its not crashing at all – Bangalore Jul 16 '16 at 10:00
@Bangalore: just small change will work without crash NSPredicate *predicate = [NSPredicate predicateWithFormat:@"self.status == 'completed' and self.rating = NULL"]; NULL is C pointers (type void *). and == checking for actual object pointer address. – kaushal Jul 16 '16 at 13:02
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFDictionary filteredArrayUsingPredicate:]: unrecognized selector sent to instance 0x15087ad70' – Bangalore Jul 19 '16 at 04:38
that means your are filtereding NSCFDictionary it is not a array @Bangalore – balkaran singh Jul 19 '16 at 04:58
Good So you finally found the issue @Bangalore :) – balkaran singh Jul 19 '16 at 05:14
is there any way to use predicate on NSdictionary or Convert NSDictionary to NSMutableArray? – Bangalore Jul 19 '16 at 05:17
can you send me your id "response" value @Bangalore – balkaran singh Jul 19 '16 at 05:33
{ "completed_order_image_link" = ""; "created_at" = "2016-07-15T12:24:04.386+05:30"; "customer_id" = 483; "customer_mobile" = 00000000; id = 4574; "o_fare" = { "waiting_charge" = 0; "waiting_time" = 60; "waypoint_charge" = 0; }; "previous_due" = 0; rating = ""; "receiver_mobile_number" = 00000000; "receiver_name" = Delta; status = completed; "tracking_url" = ""; "updated_at" = "2016-07-15T12:28:32.958+05:30"; } – Bangalore Jul 19 '16 at 06:19
@balkaransingh have you seen response (above) – Bangalore Jul 19 '16 at 06:22
@Bangalore yes i see plz wait – balkaran singh Jul 19 '16 at 06:44
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/117660/discussion-between-balkaran-singh-and-bangalore). – balkaran singh Jul 19 '16 at 06:47

score 0 · Answer 2 · answered Jul 16 '16 at 11:11

please check this code

NSString *response=@"[{\"status\":\"not completed\",\"rating\":2},{\"status\":\"not completed\",\"rating\":2},{\"status\":\"not completed\",\"rating\":2},{\"status\":\"not completed\",\"rating\":2},{\"status\":\"not completed\",\"rating\":2}]";
    NSData *data=[response dataUsingEncoding:NSUTF8StringEncoding];
    NSMutableArray *array=[NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"self.status == 'completed' AND self.rating == %@",@"<null>"];

    NSArray *arr = [array filteredArrayUsingPredicate:predicate];

and array is

<__NSCFArray 0x7f880a5eda70>(
{
    rating = 2;
    status = "not completed";
},
{
    rating = 2;
    status = "not completed";
},
{
    rating = 2;
    status = "not completed";
},
{
    rating = 2;
    status = "not completed";
},
{
    rating = 2;
    status = "not completed";
}
)

it will be work fine

NSPredicate code crashing on NSMutableArray ? objective c

2 Answers2