CODEWITHSUNDEEP
iosxcodeuitableviewnsdictionary
marsrover
marsrover

Reputation: 715

NSDictionary with multiple keys to TableView

I´m working on an iOS application that is going to list some data that I stored in a NSDictionary. I will use a table view to do this, but having some problem how I should start.

The data looks something like this:

category =     (
            {
        description =             (
                            {
                id = 1;
                name = Apple;
            },
                            {
                id = 5;
                name = Pear;
            },
                            {
                id = 12;
                name = Orange;
            }
        );
        id = 2;
        name = Fruits;
    },
            {
        description =             (
                            {
                id = 4;
                name = Milk;
            },
                            {
                id = 7;
                name = Tea;
            }
        );
        id = 5;
        name = Drinks;
    }
);

I´m trying to put all the "category" values as a section in the table and the the "name" from each "description" in the correct section. As I mentioned, not sure how to start here, how do I get a new section for every "category"?

Upvotes: 0

Views: 1459

Answers (1)

Martin R
Martin R

Reputation: 539805

You "just have to" implement the table view datasource methods to extract the information from your dictionary :-)

If self.dict is the above dictionary, then self.dict[@"category"] is an array containing one dictionary per section. Therefore (using the "modern Objective-C subscripting syntax"):

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return [self.dict[@"category"] count];
}

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
    return self.dict[@"category"][section][@"name"];
}

For each section,

self.dict[@"category"][section][@"description"]

is an array containing one dictionary per row. Therefore:

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [self.dict[@"category"][section][@"description"] count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }

    NSString *name = self.dict[@"category"][indexPath.section][@"description"][indexPath.row][@"name"];
    cell.textLabel.text = name;
    return cell;
}

Upvotes: 2

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