showing data in table view sections from different NSMutableArrays - iphone

Question

I am fetching data form JSON and storing that data in 10 differnet NSMutable Arrays .I want to show that data in 10 sections of the tableview so how to do this
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
// Return the number of rows in the section.
//return categories.count ;
if(section == 0)
{
return [appDelegate.books1 count];
}
else if(section == 1)
{
return [appDelegate.books2 count];
}
else if(section == 2)
{
return [appDelegate.books3 count];
}
else if(section == 3)
{
return [appDelegate.books4 count];
}
else if(section == 4)
{
return [appDelegate.books5 count];
}
else if(section == 5)
{
return [appDelegate.books6 count];
}
else if(section == 6)
{
return [appDelegate.books7 count];
}
else if(section == 7)
{
return [appDelegate.books8 count];
}
else if(section == 8)
{
return [appDelegate.books9 count];
}
else if(section == 9)
{
return [appDelegate.books10 count];
}
}
if i am doing below it shows only first section
Book1*aBook=[appDelegate.books1 objectAtIndex:indexPath.row];
int count=[appDelegate.books1 count];
cell.text = aBook.municipality;
cell.detailTextLabel.text=aBook.title;
cell.textLabel.backgroundColor=[UIColor clearColor];
cell.backgroundColor=[UIColor clearColor];
self.tableView.backgroundColor=[UIColor clearColor];
return cell;

Answer 1

In my view (if you don't want to change much in your code) do it like this
make an another NSMutableArray object lets say allData
add all your array into allData according to section, somthing like this
[allDatad addObjects:appDelegate.books1,appDelegate.books2,appDelegate.books3...,appDelegate.books10,nil];
now in cellForRowAtIndexPath just change this
Book1* aBook=[[allData objectAtIndex:indexPath.section] objectAtIndex:indexPath.row];
int count=[[allData objectAtIndex:indexPath.section] count];
and in
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [[allData objectAtIndex:indexPath.section] count];
}

Answer 2

Use indexPath.section to determine for which section you are preparing your cell.
For e.g., if indexPath.section is 3 then use appDelegate.books4.
Hope this helps.

Answer 3

A better more scalable implementation would be to add these arrays to another array, say arrayOfArrays. Now your number of sections are
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return [arrayOfArrays count];
}
number of rows are:
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [[arrayOfArrays objectAtIndex:section] count];
}
and your cellForRowAtIndexPath is:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
//all the dequeueing and initialization and stuff
Book1 *aBook=[[arrayOfArrays objectAtIndex:indexPath.section] objectAtIndex:indexPath.row];
int count=[[arrayOfArrays objectAtIndex:indexPath.section] count];
cell.text = aBook.municipality;
cell.detailTextLabel.text=aBook.title;
//do other stuff
return cell;
}

Answer 4

You should store all those arrays in NSMutableDictionary like,
NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
[dict setObject:appDelegate.books1 forKey:#"1"];
[dict setObject:appDelegate.books2 forKey:#"2"];
[dict setObject:appDelegate.books3 forKey:#"3"];
and access with the reference of indexPath.section while creating cell like,
Book1*aBook = [dict valueForKey:[NSString stringWithFormat:#"%i", indexPath.section + 1]];
and at time when you want to define numberOfRowsInSection you can get count from the NSMutableDictionary.
Book1*aBook = [dict valueForKey:[NSString stringWithFormat:#"%i", section + 1]];
[aBook count];

Answer 5

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *MyIdentifier = #"MyIdentifier";
Book1*aBook;
UITableViewCell *cell = (UITableViewCell *)[tableView dequeueReusableCellWithIdentifier:MyIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:MyIdentifier] autorelease];
}
if(indexPath.section == 0)
{
aBook=[appDelegate.books1 objectAtIndex:indexPath.row];
}
else if(indexPath.section == 1)
{
aBook=[appDelegate.books2 objectAtIndex:indexPath.row];
}
int count=[appDelegate.books1 count];
cell.text = aBook.municipality;
cell.detailTextLabel.text=aBook.title;
cell.textLabel.backgroundColor=[UIColor clearColor];
cell.backgroundColor=[UIColor clearColor];
self.tableView.backgroundColor=[UIColor clearColor];
return cell;
}