How to manage UITableView if number of sections are not confirmed - ios

Question

I am using UITableView in which number of sections are created dynamically according to the data. From 1 to 12. Section names are the names of months. How can I check w.r.t to the sections name. My code is
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return [sectionArray count];
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
return [sectionArray objectAtIndex:section];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
int count = 0;
for(int counter=0; counter<[sectionArray count]; counter++)
{
NSString *month = [sectionArray objectAtIndex:counter];
if([month isEqualToString:#"October"])
{
count = [octoberArray count];
}
else if([month isEqualToString:#"November"])
{
count = [novemberArray count];
}
else if([month isEqualToString:#"December"])
{
count = [decemberArray count];
}
else if([month isEqualToString:#"January"])
{
count = [januaryArray count];
}
else if([month isEqualToString:#"February"])
{
count = [febuaryArray count];
}
else if([month isEqualToString:#"March"])
{
count = [marchArray count];
}
else if([month isEqualToString:#"April"])
{
count = [aprilArray count];
}
else if([month isEqualToString:#"May"])
{
count = [mayArray count];
}
else if([month isEqualToString:#"June"])
{
count = [juneArray count];
}
else if([month isEqualToString:#"July"])
{
count = [julyArray count];
}
else if([month isEqualToString:#"August"])
{
count = [augustArray count];
}
else
{
count = [septemberArray count];
}
}
return count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
HistoryCell *cell = (HistoryCell *)[tableView dequeueReusableCellWithIdentifier:#"historyCell"];
if(cell == nil)
{
cell = [[[NSBundle mainBundle]loadNibNamed:#"HistoryCell" owner:self options:nil] objectAtIndex:0];
}
for(int counter=0; counter<[sectionArray count]; counter++)
{
NSString *month = [sectionArray objectAtIndex:counter];
if([month isEqualToString:#"October"])
{
cell.glassesLabel.text = [NSString stringWithFormat:#"%# Glasses",[octoberGlassesArray objectAtIndex:indexPath.row]];
cell.unitLabel.text = #"Unit";
cell.dateLabel.text = [octoberArray objectAtIndex:indexPath.row];
}
else if([month isEqualToString:#"November"])
{
cell.glassesLabel.text = [NSString stringWithFormat:#"%# Glasses",[novemberGlassesArray objectAtIndex:indexPath.row]];
cell.dateLabel.text = [novemberArray objectAtIndex:indexPath.row];
}
else if([month isEqualToString:#"December"])
{
cell.glassesLabel.text = [NSString stringWithFormat:#"%# Glasses",[decemberGlassesArray objectAtIndex:indexPath.row]];
cell.dateLabel.text = [decemberArray objectAtIndex:indexPath.row];
}
else if([month isEqualToString:#"January"])
{
cell.glassesLabel.text = [NSString stringWithFormat:#"%# Glasses",[januaryGlassesArray objectAtIndex:indexPath.row]];
cell.dateLabel.text = [januaryArray objectAtIndex:indexPath.row];
}
else if([month isEqualToString:#"February"])
{
cell.glassesLabel.text = [NSString stringWithFormat:#"%# Glasses",[febuaryGlassesArray objectAtIndex:indexPath.row]];
cell.dateLabel.text = [febuaryArray objectAtIndex:indexPath.row];
}
else if([month isEqualToString:#"March"])
{
cell.glassesLabel.text = [NSString stringWithFormat:#"%# Glasses",[marchGlassesArray objectAtIndex:indexPath.row]];
cell.dateLabel.text = [marchArray objectAtIndex:indexPath.row];
}
else if([month isEqualToString:#"April"])
{
cell.glassesLabel.text = [NSString stringWithFormat:#"%# Glasses",[aprilGlassesArray objectAtIndex:indexPath.row]];
cell.dateLabel.text = [aprilArray objectAtIndex:indexPath.row];
}
else if([month isEqualToString:#"May"])
{
cell.glassesLabel.text = [NSString stringWithFormat:#"%# Glasses",[mayGlassesArray objectAtIndex:indexPath.row]];
cell.dateLabel.text = [mayArray objectAtIndex:indexPath.row];
}
else if([month isEqualToString:#"June"])
{
cell.glassesLabel.text = [NSString stringWithFormat:#"%# Glasses",[juneGlassesArray objectAtIndex:indexPath.row]];
cell.dateLabel.text = [juneArray objectAtIndex:indexPath.row];
}
else if([month isEqualToString:#"July"])
{
cell.glassesLabel.text = [NSString stringWithFormat:#"%# Glasses",[julyGlassesArray objectAtIndex:indexPath.row]];
cell.dateLabel.text = [julyArray objectAtIndex:indexPath.row];
}
else if([month isEqualToString:#"August"])
{
cell.glassesLabel.text = [NSString stringWithFormat:#"%# Glasses",[augustGlassesArray objectAtIndex:indexPath.row]];
cell.dateLabel.text = [augustArray objectAtIndex:indexPath.row];
}
else
{
cell.glassesLabel.text = [NSString stringWithFormat:#"%# Glasses",[septemberGlassesArray objectAtIndex:indexPath.row]];
cell.dateLabel.text = [septemberArray objectAtIndex:indexPath.row];
}
}
return cell;
}
The application crashes. How can I fix this issue?

Answer 1

I'm sure you don't clearly understand how UITableViewDataSource works. But if I understand your idea correctly the code below should fix the problem:
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return [sectionArray count];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
NSArray *yourMonthArray = //Here get an array for adequate month
return [yourMonthArray count];
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
NSArray *arr = #[#"January",#"February",...,#"December"];
// asserts are optional. Just for sure you initialized your data well.
NSAssert(arr.count == 12, #"The number of months is not valid");
NSAssert(arr.count == [sectionArray count], #"Number of months is different than number of sections");
return arr[section];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
HistoryCell *cell = (HistoryCell *)[tableView dequeueReusableCellWithIdentifier:#"historyCell"];
if(cell == nil)
{
// Please consider using UINib instread.
cell = [[[NSBundle mainBundle]loadNibNamed:#"HistoryCell" owner:self options:nil] objectAtIndex:0];
}
NSString *month = [sectionArray objectAtIndex:indexpath.section];
cell.glassesLabel.text = [NSString stringWithFormat:#"%# Glasses",[octoberGlassesArray objectAtIndex:indexPath.section]];
cell.unitLabel.text = #"Unit";
NSArray *yourMonthArray = //Here get an array for adequate month
cell.dateLabel.text = yourMonthArray[indexPath.row];
return cell;
}