It is possible to have numberOfSectionsInTableView dynamically? - iphone

Question

Can I have the number of rows dynamically?
I'm trying to remove a tableView section header and I don'k know how... and I've taught that a solution would be to change the number of sections.
Right now my numberOfSectionsInTableView looks like:
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 2;
}
and
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
beTribesAppDelegate *appDelegate = [UIApplication sharedApplication].delegate;
switch (section) {
case 0:
return [appDelegate.firstArray count];
case 1:
return [appDelegate.secondArray count];
default:
return 0;
}
}
setting the title section like this:
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
sectionTitles = [[NSMutableArray alloc] init];
[sectionTitles addObject:#"firstSection"];
[sectionTitles addObject:#"secondSection"];
NSString *sectionText = [sectionTitles objectAtIndex:section];
return sectionText;
}

Answer 1

I am not sure to understand the question as the answer seems trivial: just change the implementation to return some dynamic value and you are done, right?
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return self.nbSections;
}
Where nbSections is a property to which you will assign the value you want so you can change it at any time you want. So what's the matter then?
PS: Of course, call [tableView reloadData] to recompute the content of your tableView and make the new value being taken into account obviously... maybe that's what you were missing?

Answer 2

To remove the section header you must set the header height to 0 like so
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section{
switch (section) {
case 0:
return 0;
default:
return 44;
}
}
this example will remove the first section header and all the others will be set to 44.

Answer 3

First thing to do would be to move the sectionTitles array into a property on your view controller, and initialise it in your init method.
Then when you want to change the title of a section change the value in the array and call [tableView reloadData]
Do you want to remove the whole section from the tableView or just the header? if you want to just remove the header set the item in the array to #""
If you want to remove the section altogether remove the item from sectionTitles and change your numberOfSectionsInTableView method to read:
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return [sectionTitles count];
}