-[__NSCFConstantString allKeys]: unrecognized selector sent to instance 0xf9ac8

Question

My app when I run it on my phone I get this error:

I just tried to parse a json and trying to use images in two column of custom cell, but my images on scroll are mis-placed.

int index=indexPath.row*2;
int newindex=index+1;

NSDictionary *u = [[results objectAtIndex:index]mutableCopy ];    
NSLog(@"NSDictionary *u = [results objectAtIndex:index] %@",u);

NSDictionary *u1 = [[results objectAtIndex:newindex]mutableCopy];
NSLog(@"NSDictionary *u1 = [results objectAtIndex:newindex] %@",u1);

But if i use both index and newindex same value it works.

:-

:-

Code :

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil suffix:(NSString *)_suffix{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        self.suffix = _suffix;
    }
    return self;
}

#pragma mark Table view methods
- (NSInteger)numberOfSectionsInTableView:(UITableView *)_tableView{
    return 1;
}


//my new
- (NSInteger)tableView:(UITableView *)_tableView numberOfRowsInSection:(NSInteger)section{
    int resultCount = [results count];
    labelResultsCount.text = [NSString stringWithFormat:@"%d",resultCount];
    return resultCount/2;
}
- (UITableViewCell *)tableView:(UITableView *)_tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
   // NSString* CellIdentifier = [NSString stringWithFormat:@"ident_%d",indexPath.row];

    static NSString *CellIdentifier = @"ResultCell";
    ResultCell *cell = (ResultCell *)[_tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil){
        NSArray *a = [[NSBundle mainBundle] loadNibNamed:@"ResultCell" owner:self options:nil];
        cell = (ResultCell *)[a objectAtIndex:0];
        [cell setSelectionStyle:UITableViewCellSelectionStyleNone];
    }   

    int index=[(indexPath.row*2) copy];
    int newindex=[(index+1) copy];


    // save badge in dictionaory and get here and show in lable

    NSDictionary *u = [[results objectAtIndex:index]mutableCopy ];

    NSLog(@"NSDictionary *u = [results objectAtIndex:newindex] %@",u);



   NSDictionary *u1 = [[results objectAtIndex:newindex]mutableCopy];

    NSLog(@"NSDictionary *u1 = [results objectAtIndex:indexPath.row*2+1 newindex] %@",u1);


    @try {
        /* fullName */
        NSString *nickName = [u objectForKey:@"nickName"];
        cell.labelName.text = nickName;


        NSString *nickName1 = [u1 objectForKey:@"nickName"];
        cell.labelName1.text = nickName1;

        /* chat notification*/

        cell.imageViewNotification.hidden=0;
        cell.imageViewNotification1.hidden=0;

        NSString *badge = [u objectForKey:@"badge"];
        NSString *badge1 = [u1 objectForKey:@"badge"];



        if([badge intValue]>0)
        {
            cell.imageViewNotification.hidden=0;
            cell.labelNotification.text = badge;
            NSLog(@"inside > 0 %@",badge);


        }
        else if([badge intValue]<=0) 
        {
            cell.imageViewNotification.hidden=1;
            cell.labelNotification.text=@"";
            NSLog(@"%@",badge);



        }



        if([badge1 intValue]>0)
        {
            cell.imageViewNotification1.hidden=0;
            cell.labelNotification1.text = badge1;
            NSLog(@"inside > 0 %@",badge1);


        }
        else if([badge1 intValue]<=0) 
        {
            cell.imageViewNotification1.hidden=1;
            cell.labelNotification1.text=@"";
            NSLog(@"%@",badge1);



        }


        /*..................*/


        /* distance */
        id distance = [u objectForKey:@"distance"];
        if([distance isKindOfClass:[NSString class]]){
            cell.labelDistance.text = distance;
            cell.imageViewDistance.hidden = 0;
        }else{
            cell.imageViewDistance.hidden = 1;
            cell.labelDistance.text = @"";
        }


        id distance1 = [u1 objectForKey:@"distance"];
        if([distance1 isKindOfClass:[NSString class]]){
            cell.labelDistance1.text = distance1;
            cell.imageViewDistance1.hidden = 0;
        }else{
            cell.imageViewDistance1.hidden = 1;
            cell.labelDistance1.text = @"";
        }
        /* online */
        NSNumber *online = [u objectForKey:@"online"];
        cell.imageViewOnline.image = [online intValue] ? [UIImage imageNamed:@"circle_online.png"] : [UIImage imageNamed:@"circle_offline_red.png"];


        NSNumber *online1 = [u1 objectForKey:@"online"];
        cell.imageViewOnline1.image = [online1 intValue] ? [UIImage imageNamed:@"circle_online.png"] : [UIImage imageNamed:@"circle_offline_red.png"];

        /* buttonProfile */

        id d = [u objectForKey:@"thumbnails"];
        id d1 = [u1 objectForKey:@"thumbnails"];

        if([d isKindOfClass:[NSDictionary class]] ||[d1 isKindOfClass:[NSDictionary class]]){
            if([[d allKeys] count]>0 ||[[d1 allKeys] count]>0){
                NSString *imageSuffix = [d objectForKey:@"icon"];
                NSString *imageSuffix1 = [d1 objectForKey:@"icon"];
                NSLog(@"[d allKeys] count]%@", d);
                NSLog(@"[d1 allKeys] count]%@", d1);

                UIImage *image = [[SharingCenter sharedManager] imageFromCache:imageSuffix];
                UIImage *image1 = [[SharingCenter sharedManager] imageFromCache:imageSuffix1];
                if(image||image1)
                {
                    [cell.buttonUserProfile setBackgroundImage:image forState:UIControlStateNormal];
                    [cell.buttonUserProfile1 setBackgroundImage:image1 forState:UIControlStateNormal];
                }
                else{
                    NSString *gender = [u objectForKey:@"gender"]; 
                    NSString *gender1 = [u1 objectForKey:@"gender"]; 

                    UIImage *profileDefualtImage = [gender isEqualToString:@"M"] ? [UIImage imageNamed:@"no_photo_male.png"] : [UIImage imageNamed:@"no_photo_female.png"];

                    UIImage *profileDefualtImage1 = [gender1 isEqualToString:@"M"] ? [UIImage imageNamed:@"no_photo_male.png"] : [UIImage imageNamed:@"no_photo_female.png"];


                    [cell.buttonUserProfile setBackgroundImage:profileDefualtImage forState:UIControlStateNormal];
                    [cell.buttonUserProfile1 setBackgroundImage:profileDefualtImage1 forState:UIControlStateNormal];



                    /* downlowd Image */
                    NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"%@%@",WebServicePrefix,imageSuffix]];
                    __block
                    ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
                    request.delegate = self;
                    [request setPostValue:[NSString stringWithFormat:@"%f",[[SharingCenter sharedManager] currentCoordinate].latitude] forKey:@"lat"];
                    [request setPostValue:[NSString stringWithFormat:@"%f",[[SharingCenter sharedManager] currentCoordinate].longitude] forKey:@"lon"];
                    //  [[[SharingCenter sharedManager] imagesCache] removeAllObjects];

                    [request setCompletionBlock:^{
                        NSData *imageData = [request responseData];
                        if(imageData){
                            UIImage *image = [UIImage imageWithData:imageData];
                            if(image){


                                [[[SharingCenter sharedManager] imagesCache] setObject:image forKey:imageSuffix];

                                if([[self.tableView indexPathsForVisibleRows] containsObject:indexPath]){
                                    ResultCell *cell = (ResultCell *)[self.tableView cellForRowAtIndexPath:indexPath];
                                    [cell.buttonUserProfile setBackgroundImage:image forState:UIControlStateNormal]; 
                                }
                            }
                        }
                    }];
                    [request setFailedBlock:^{
                        NSError *error = request.error;
                        NSLog(@"%@",error);
                    }];

            /* downlowd Image */
            NSURL *url1 = [NSURL URLWithString:[NSString stringWithFormat:@"%@%@",WebServicePrefix,imageSuffix1]];
            __block
            ASIFormDataRequest *request1 = [ASIFormDataRequest requestWithURL:url1];
            request1.delegate = self;
            [request1 setPostValue:[NSString stringWithFormat:@"%f",[[SharingCenter sharedManager] currentCoordinate].latitude] forKey:@"lat"];
            [request1 setPostValue:[NSString stringWithFormat:@"%f",[[SharingCenter sharedManager] currentCoordinate].longitude] forKey:@"lon"];
            //  [[[SharingCenter sharedManager] imagesCache] removeAllObjects];

            [request1 setCompletionBlock:^{
                NSData *imageData1 = [request1 responseData];
                if(imageData1){
                    UIImage *image1 = [UIImage imageWithData:imageData1];
                    if(image1){

                        [[[SharingCenter sharedManager] imagesCache] setObject:image1 forKey:imageSuffix1];

                        if([[self.tableView indexPathsForVisibleRows] containsObject:indexPath]){
                            ResultCell *cell = (ResultCell *)[self.tableView cellForRowAtIndexPath:indexPath];
                            [cell.buttonUserProfile1 setBackgroundImage:image1 forState:UIControlStateNormal]; 
                        }
                    }
                }
            }];
            [request1 setFailedBlock:^{
                NSError *error = request1.error;
                NSLog(@"%@",error);
            }];
                    [[self networkQueue] addOperation:request];
                    [[self networkQueue] addOperation:request1];




        }
     }
    }


    else{
            NSString *gender = [u objectForKey:@"gender"];
        NSString *gender1 = [u1 objectForKey:@"gender"];

            UIImage *profileDefualtImage = [gender isEqualToString:@"M"] ? [UIImage imageNamed:@"no_photo_male.png"] : [UIImage imageNamed:@"no_photo_female.png"];
            [cell.buttonUserProfile setBackgroundImage:profileDefualtImage forState:UIControlStateNormal];


        UIImage *profileDefualtImage1 = [gender1 isEqualToString:@"M"] ? [UIImage imageNamed:@"no_photo_male.png"] : [UIImage imageNamed:@"no_photo_female.png"];
        [cell.buttonUserProfile1 setBackgroundImage:profileDefualtImage1 forState:UIControlStateNormal];
        }       

        /* pickStatus */
        NSNumber *pickStatus = [u objectForKey:@"pick_status"];
        NSNumber *pickStatus1 = [u1 objectForKey:@"pick_status"];

        switch ([pickStatus intValue]) {
            case 0:
                cell.imageViewBorder.image = [UIImage imageNamed:@"border_yellow_transperent.png"];
                cell.buttonUserPick.enabled = 1;
                [cell.buttonUserPick setBackgroundImage:[UIImage imageNamed:@"button_circle_pick.png"] forState:UIControlStateNormal];


                break;
            case 1:
                cell.imageViewBorder.image = [UIImage imageNamed:@"border_red_transperent.png"];
                cell.buttonUserPick.enabled = 0;
                [cell.buttonUserPick setBackgroundImage:[UIImage imageNamed:@"button_circle_wait.png"] forState:UIControlStateDisabled];



                break;
            case 2:
                cell.imageViewBorder.image = [UIImage imageNamed:@"border_red_transperent.png"];
                cell.buttonUserPick.enabled = 1;
                [cell.buttonUserPick setBackgroundImage:[UIImage imageNamed:@"button_circle_pick.png"] forState:UIControlStateNormal];
                break;
            case 3:
                cell.imageViewBorder.image = [UIImage imageNamed:@"border_red_transperent.png"];
                cell.buttonUserPick.enabled = 0;
                [cell.buttonUserPick setBackgroundImage:[UIImage imageNamed:@"button_circle_date.png"] forState:UIControlStateDisabled];



                break;
            default:
                break;
        }



        switch ([pickStatus1 intValue]) {
            case 0:
                cell.imageViewBorder1.image = [UIImage imageNamed:@"border_yellow_transperent.png"];
                cell.buttonUserPick1.enabled = 1;
                [cell.buttonUserPick1 setBackgroundImage:[UIImage imageNamed:@"button_circle_pick.png"] forState:UIControlStateNormal];


                break;
            case 1:
                cell.imageViewBorder1.image = [UIImage imageNamed:@"border_red_transperent.png"];
                cell.buttonUserPick1.enabled = 0;
                [cell.buttonUserPick1 setBackgroundImage:[UIImage imageNamed:@"button_circle_wait.png"] forState:UIControlStateDisabled];



                break;
            case 2:
                cell.imageViewBorder1.image = [UIImage imageNamed:@"border_red_transperent.png"];
                cell.buttonUserPick1.enabled = 1;
                [cell.buttonUserPick1 setBackgroundImage:[UIImage imageNamed:@"button_circle_pick.png"] forState:UIControlStateNormal];
                break;
            case 3:
                cell.imageViewBorder1.image = [UIImage imageNamed:@"border_red_transperent.png"];
                cell.buttonUserPick1.enabled = 0;
                [cell.buttonUserPick1 setBackgroundImage:[UIImage imageNamed:@"button_circle_date.png"] forState:UIControlStateDisabled];



                break;
            default:
                break;
        }
    }
    @catch (NSException * e) {
        NSLog(@"%@",e);
    }
    @finally {
        return cell;
    }
}

Answer 1

Educated guess:

This line causes your problem:

if([d isKindOfClass:[NSDictionary class]] ||[d1 isKindOfClass:[NSDictionary class]]){
    if([[d allKeys] count]>0 ||[[d1 allKeys] count]>0){

There are 4 different possibilities how the first if will come out:

1. d and d1 are both NSStrings. Line 2 will not be called
2. d is NSDictionary, d1 is a NSString. Line 2 will be called
3. d is NSString, d1 is a NSDictionary. Line 2 will be called
4. d and d1 are both NSDictionaries. Line 2 will be called.

First case is no problem at all. Last case neither. In case 2 and 3 allKeys will be called on a object that is not a NSDictionary.

You should probably replace it with an "if" that needs both tests to be true.

if([d isKindOfClass:[NSDictionary class]] && [d1 isKindOfClass:[NSDictionary class]]){
                                          ^^

Another option would be to check individually.

if([d isKindOfClass:[NSDictionary class]]) {
   x = [d allKeys];
}
if([d1 isKindOfClass:[NSDictionary class]]) {
   x = [d1 allKeys];
}

Answer 2

That's a lot of code to look through, but I think this could be the problem:

if([d isKindOfClass:[NSDictionary class]] ||[d1 isKindOfClass:[NSDictionary class]]){
            if([[d allKeys] count]>0 ||[[d1 allKeys] count]>0){

This if statement will pass if either d or d1 is a dictionary. If one isn't, it would cause that error you see on the second line. Log the class of d and d1 to see if they're both dictionaries.

Answer 3

You are probably doing something to those NSDictionary objects somewhere, reading their allKeys. But my guess is that the objects you try to fetch from that results array aren't NSDictionary objects but NSString objects.

Try logging their class property to see what you are dealing with (you can also find this out by just looking at the JSON of course).

NSDictionary *u = [[results objectAtIndex:index]mutableCopy ];
NSLog(@"u Class: %@", [u class]);

Also, why are you making a mutableCopy of the object right to a non-mutable NSDictionary object.

Using the following should do the trick normally:

NSDictionary* u = [results objectAtIndex:index];
NSLog(@"u Class: %@", [u class]);