CODEWITHSUNDEEP
iphonecocoa-touchjsonuitableviewnsarray
btwong
btwong

Reputation: 49

Nested NSArray into UITableView

i have looked everywhere for this, but i am unable to find the exact answer... all have slight variations.

Anyway, i call a json page that returns the following (from the NSLog):

{
    messages =         {
        1 =             {
            Body = "This is the body of message 1";
            Title = "Message 1";
        };
        2 =             {
            Body = "This is the body of message 2";
            Title = "Message 2";
        };
    };
}

I then save the data into a NSDictionary (called messageArray). (the array is a NSMutableArray)

then i do:

// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease];
    }

    //put rowsarray into dictionary
    NSDictionary *dictionary = [messageArray objectAtIndex:indexPath.section];

    //new dictionary into array
    NSArray *messages = [dictionary objectForKey:@"messages"];

    NSLog(@"the message array = %@",messages );

    //this fails
    cell.textLabel.text = [messages objectAtIndex:indexPath.row];

return cell;

the returned NSLog (so i am assuming my json array is working correctly):

the message array = {
1 =     {
    Body = "This is the body of message 1";
    Title = "Message 1";
};
2 =     {
    Body = "This is the body of message 2";
    Title = "Message 2";
};

}

I understand that i am not labelling the textlabels.text correctly, but i am not sure how to go about looping through the "messages" array, to display all the "Title" values from the array, to display on my UITableView list.

i am certain i am missing something so simple... but it has eluded me until now. Any links welcome... i will keep searching myself....

Upvotes: 0

Views: 1281

Answers (4)

Ishu
Ishu

Reputation: 12787

NSArray *messages = [dictionary objectForKey:@"messages"];

what is the need of this line if you get your dictionary here

NSDictionary *dictionary = [messageArray objectAtIndex:indexPath.section];

now, you know what are the keys for attaching data to dictionary.

then simply

cell.textLabel.text = [dictionary valueForKey:@"Title"];
cell.detailTextLabel.text= [dictionary valueForKey:@"Body"];

Upvotes: 1

btwong
btwong

Reputation: 49

i have "semi" sorted the issue. I have removed the indexes from the json data so now it looks like:

messages =     (
            {
        Body = "This is the body of message 1";
        Title = "Message 1";
    },
            {
        Body = "This is the body of message 2";
        Title = "Message 2";
    }
);

And have used this for the populating of the table:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease];
    }

    //put rowsarray into dictionary
    NSDictionary *dictionary = [messageArray objectAtIndex:indexPath.section];

    NSLog(@"dictionary = %@", dictionary );

    //new dictionary into array
    NSArray *messages = [dictionary objectForKey:@"messages"];

    //NSArray *message=[[messages allKeys] sortedArrayUsingSelector:@selector(compare:)];
    NSLog(@"array messages = %@", messages );

    cell.textLabel.text = [[messages objectAtIndex:indexPath.row] objectForKey:@"Title"]; 

    return cell;
}

i hope this helps someone.

Upvotes: 0

griotspeak
griotspeak

Reputation: 13247

cell.textLabel.text = [[messages objectAtIndex:indexPath.row] objectForKey:@"Title"];
cell.detailTextLabel.detailLabel = [[messages objectAtIndex:indexPath.row] objectForKey:@"Body"];

Upvotes: 0

D.C.
D.C.

Reputation: 15588

This call 

cell.textLabel.text = [messages objectAtIndex:indexPath.row];

looks like it is returning a dictionary, and you are trying to stuff it into a test field. I would confirm that this is a dictionary first, something like:

NSLog(@"%@",  [messages objectAtIndex:indexPath.row])

If that is not a string, that may be your problem.

To get the string you want, you might do something like:

 [[messages objectAtIndex:indexPath.row] valueForKey:@"Title"]

Upvotes: 0

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