number of rows in section - ios

Question

I have a table view which populates from a plist. in a plist I have a Categories array:
Catgeories - Array
item 0 - Maths
item 1 - English
....
in the same plist i have a Notes array
Notes - Array
item 0 - Dictionary
Title - My maths note 1
Text - This is algebra
Category - Maths
item 1 - Dictionary
Title - My English
Text - This is algebra
Category - English
in number of sections i have...
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return [self.categories count];
}
In numberOfRowsInSection before i added the categories array to the plist i could simply use
return self.notes.count;
which produces a duplicate in every category: http://i.stack.imgur.com/9xScH.png
but now in this method i should expect to return the number of rows based on the section, not sure how to do this

Answer 1

You need to do something like that:
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView;
{
return self.notes.count;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return self.notes[section].count;
}
You get array of you notes base on the section and return count of the array.
//EXTENDED
If you want to have as many section as data in Category array use:
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView;
{
return self.catgeories.count;
}
The self.note array contain dictionaries object with Category key and I believe you want to show all of the data for section where category is equal section category. To do that you have to filter your notes array, try this (I assume that you have distinct objects in Caregory plist):
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Get category
NSString *cat = self.catgeories[section];
//Filter notes array
NSPredicate *pred = [NSPredicate predicateWithFormat:#"Category =[cd] %#", cat];
NSArray * catArray = [self.notes filteredArrayUsingPredicate:pred];
return catArray.count;
}

Answer 2

I have edited the answer.
If you wanna access large amount of data, i suggest that you store your data in core data instead of plist,
For getting number of rows for each section you can use this
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// check if the count of the array is greater than number of sections
if (self.notes.count > section)
return [[[self.notes objectAtIndex:section]allObjects]count];
}
Hope it helps :)

Answer 3

You can try like this if you want to return different number of rows in each section:-
- (NSInteger)tableView:(UITableView
*)tableView numberOfRowsInSection:
(NSInteger)section
{
int rows=0;
if(section==0)
{
rows=1;
}
if(section==1)
{
rows=2;
}
rerurn rows;
}