UITableView with multiple sections shows only one section - ios

Question

I have a problem which seems to be very simple. I have a UITableView in my APP. In numberOfSectionsInTableView: I set the count of sections to 2. However the tableView shows only the first section. I tried to make the two sections show same contents by writing same codes in both sections, but useless. Then I found a similar question here. But its correct answer is about frame and my layout is a very simple UITableViewController. At last I tried to add NSLog to the three methods. The result is: For case section 1, numberOfSectionsInTableView: and numberOfRowsInSection: are called but cellForRowAtIndex isn't called. I wonder how to explain this.
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 2;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
int count;
switch (section) {
case 0:
count = [_objectArray count];
break;
case 1:
NSLog(#"section called"); // This line is logged
count = 1;
default:
count = 0;
break;
}
return count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"myCellIdentifier";
static NSString *basicCellIdentifier = #"myBasicCellIdentifier";
switch ([indexPath section]) {
case 0: {
TableViewStoryCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier
forIndexPath:indexPath];
// Configure the cell...
int theIndex = [indexPath row];
MyObject *theObj = [_objectArray objectAtIndex:theIndex];
cell.object = theObj;
return cell;
break;
}
case 1: {
NSLog(#"cell called"); //this line isn't logged
for (int i = 0; i < 50; i++) {
NSLog(#"hahaha");
}
MyBasicViewStoryCell *cell = [tableView dequeueReusableCellWithIdentifier:basicCellIdentifier forIndexPath:indexPath];
return cell;
break;
}
default: {
for (int i = 0; i < 50; i++) {
NSLog(#"hahaha1");
}
return nil;
break;
}
}
}

Answer 1

Put break in switch case. You missed break in case 1: so the default will also execute. Thus the count become zero count = 0. Since numberOfRowsInSection: returns zero, cellForRowAtIndexPath: will not call. So put break in case 1: of numberOfRowsInSection:
switch (section) {
case 0:
count = [_objectArray count];
break;
case 1:
NSLog(#"section called"); // This line is logged
count = 1;
break; // Here
default:
count = 0;
break;
}

Answer 2

You don't have a break after you set the count for section 1 and it falls through and is set to zero.
case 1:
NSLog(#"section called"); // This line is logged
count = 1;
break; // always put break!

Answer 3

cellForRowAtIndexPath won't be called if numberOfRowsInSection is not returning a value that is >=1.