Accessing NSMutableArray Objects For Using On TableView - ios

Question

I started develop an app which is using WCF service with JSON data. I got the data from WCF service but I didn't use it as I want.
here is the JSON data:
{"MenuDoldurAndroidResult":[
{"menu_description":"Turkish Pizza","menu_title":"L Pizza","menu_price":"26 TL"},{"menu_description":"Italiano Pizza","menu_title":"L Pizza","menu_price":"27 TL"},{"menu_description":"Extravaganza","menu_title":"L Pizza","menu_price":"29 TL"},{"menu_description":"Pepporoni Pizza","menu_title":"L Pizza","menu_price":"28 TL"},{"menu_description":"Turkish Pizza","menu_title":"S Pizza","menu_price":"12 TL"},{"menu_description":"Italiano Pizza","menu_title":"S Pizza","menu_price":"13 TL"},{"menu_description":"Extravaganza","menu_title":"S Pizza","menu_price":"15 TL"},{"menu_description":"Pepporoni Pizza","menu_title":"S Pizza","menu_price":"14 TL"}
]}
What I want:
If there are 2 title here, there must be 2 section in table view. Every item must be in their section.
Like this:
-L Pizzas
Turkish Pizza 26 TL
Italiano Pizza 27 TL
Extravaganza Pizza 29 TL
Pepperoni Pizza 28 TL
-S Pizzas
Turkish Pizza 12 TL
Italiano Pizza 13 TL
Extravaganza Pizza 15 TL
Pepperoni Pizza 14 TL
How can I access this item and display like this ?
- (void)viewDidLoad
{
[super viewDidLoad];
//I posted request to service here. I didn't write these parts of code.
NSDictionary* json = [NSJSONSerialization
JSONObjectWithData:data
options:NSJSONReadingMutableContainers
error:&error];
NSMutableArray *array= [json objectForKey:#"MenuDoldurAndroidResult"];
menu = [[NSMutableArray alloc] initWithCapacity:3];
NSString *descriptionTemp;
NSString *titleTemp;
NSString *priceTemp;
for(int i=0; i< array.count; i++)
{
NSDictionary *menuList= [array objectAtIndex:i];
titleTemp = [menuList objectForKey:#"menu_title"];
descriptionTemp = [menuList objectForKey:#"menu_description"];
priceTemp = [menuList objectForKey:#"menu_price"];
[menu addObject:[NSArray arrayWithObjects:titleTemp,descriptionTemp,priceTemp,nil]];
}
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return 2;
}
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
return 2;
}
-(NSString *)tableView:(UITableView*)tableView titleForHeaderInSection:(NSInteger)section{
if (section==0) {
return #"L Pizzas";
}
else{
return #"S Pizzas";
}
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:nil];
cell.textLabel.text = [menu objectAtIndex: indexPath.row];
return cell;
}

Answer 1

If your content is static you can try using the answer by Sunny. But if is dynamic it's better to store the data in a different way. Obviously L pizza and S pizza seems to be a category and the rest are like category items.
You need to make a collection of the categories. Demo Project Source Code
- (void)viewDidLoad
{
[super viewDidLoad];
//I posted request to service here. I didn't write these parts of code.
NSDictionary* json = [NSJSONSerialization
JSONObjectWithData:data
options:NSJSONReadingMutableContainers
error:&error];
NSMutableArray *allPizzas = [json[#"MenuDoldurAndroidResult"] mutableCopy];
NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:#"menu_price"
ascending:YES
selector:#selector(compare:)];
[allPizzas sortUsingDescriptors:#[sortDescriptor]];
NSMutableArray *pizzaCategories = [#[]mutableCopy];
//Find unique categories in all the pizzas
NSSet* categories = [NSSet setWithArray: [allPizzas valueForKey:#"menu_title"]];
//Enumerate to form a new reformatted category array
for (NSString *categoryTitle in categories)
{
//Predicate is used to find the items that come under current category
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"menu_title == %#",categoryTitle];
NSArray *categoryItems = [allPizzas filteredArrayUsingPredicate:predicate];
//New dictionary with name of category and category items are formed
NSDictionary *categoryDict = #{#"menu_title":categoryTitle,#"pizzas":categoryItems};
[pizzaCategories addObject:categoryDict];
}
//Assign the new formatted category array to the instance variable for holding categories.
self.categories = pizzaCategories;
}
Modify the datasource of tableView for the new structure
#pragma mark - UITableViewDataSource
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
//The count of categories will give number of sections
NSUInteger sections = [self.categories count];
return sections;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
//The number of items in a category is calculated
NSDictionary *category = self.categories[section];
return [category[#"pizzas"] count];
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
//Title for the category
NSDictionary *category = self.categories[section];
return category[#"menu_title"];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *cellIdentifier = #"CellIdentifier";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if (!cell) {
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellIdentifier];
}
NSDictionary *category = self.categories[indexPath.section];
NSArray *categoryItems = category[#"pizzas"];
NSDictionary *categoryItem = categoryItems[indexPath.row];
cell.textLabel.text = categoryItem[#"menu_description"];
cell.detailTextLabel.text = categoryItem[#"menu_price"];
return cell;
}

Answer 2

You can also use the free Sensible TableView framework to fetch the data from the web service and automatically display it in your table view.