UITableView cells not being populated [duplicate] - ios

Question

This question already has an answer here:
ios - why does my UITableView not get populated with comments
(1 answer)
Closed 9 years ago.
I am getting a list of some ShoppingLists through a WCF call.
My code:
#import "ListTableViewController.h"
#import "ListServiceSvc.h"
#interface ListTableViewController (){
// NSMutableArray *shoppingLists;
}
#property (nonatomic, retain) NSMutableArray *shoppingList;
#end
#implementation ListTableViewController
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
_shoppingList = [NSMutableArray array];
[self loadListsFromRemoteServer];
[super viewDidLoad];
}
-(void) loadListsFromRemoteServer
{
NSString *uname = #"Test4";
NemListBinding *binding = [[ListServiceSvc NemListBinding]initWithAddress:#"http://balder.ucn.dk/dm76_gr5/WCF.ListService.svc/custom?singleWsdl"];
binding.logXMLInOut=YES;
ListServiceSvc_GetShoppingListsWithUname *parms = [[ListServiceSvc_GetShoppingListsWithUname alloc]init];
parms.uname = uname;
[binding GetShoppingListsWithUnameAsyncUsingParameters:parms delegate:self];
}
- (void) operation:(NemListBindingOperation *)operation completedWithResponse:(NemListBindingResponse *)response
{
NSArray *responseHeaders = response.headers;
NSArray *responseBodyParts = response.bodyParts;
//[NSThread sleepForTimeInterval:5.0];
NSMutableArray *shoppingListFromWebserver = [[NSMutableArray alloc] init];
// step 1 fill in the blanks.
for(id header in responseHeaders) {
// here do what you want with the headers, if there's anything of value in them
}
for (id mine in responseBodyParts)
{
if ([mine isKindOfClass:[ListServiceSvc_GetShoppingListsWithUnameResponse class]])
{
for (id slist in [[mine GetShoppingListsWithUnameResult] ShoppingList])
{
[shoppingListFromWebserver addObject:slist];
NSLog(#"new list :: RESPONSE FROM SERVER :: nList %#", [slist ShoppingListName]);
//self.result.text = [self.result.text stringByAppendingString:[slist shoppingListName]];
}
}
}
[self performSelectorOnMainThread:#selector(updateNewView:) withObject:shoppingListFromWebserver waitUntilDone:NO];
}
-(void) updateNewView:(NSMutableArray*) result
{
_shoppingList = result;
NSLog( #"new list - number of news :: %u", [_shoppingList count]);
[self.tableView reloadData];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - Table view data source
//- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
//{
// return _shoppingList.count;
//}
//- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
//{
// // Return the number of rows in the section.
// return 10;
//}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(#"cellforrow");
static NSString *CellIdentifier = #"ListCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
}
//cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
// Configure the cell...
id shopList = [_shoppingList objectAtIndex:indexPath.row];
cell.textLabel.text = [shopList ShoppingListName];
return cell;
}
Nothing happens when i run the app in Xcode. I can see in the log window that the log
NSLog( #"new list - number of news :: %u", [_shoppingList count]);
does return a value (4), but the NSLog i have made in the CellForRowAtIndexPath method does not get printed. I also have a breakpoint in there, that isn't reached. Why is it not getting to the method?

Answer 1

These methods, numberOfSectionsInTableView and numberOfRowsInSection are important to determine what number of data the TableView should show.. it should look something like this:
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1; // the number of different sections in your table view
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return [_shoppingList count]; // the number of data in your shopping list
}

Answer 2

You should not comment out these methods: numberOfSectionsInTableView and numberOfRowsInSection.
At least numberOfRowsInSection is required and must return the number of rows you want/need.
As far as I got it, this should be _shoppingList.count in your case.

Answer 3

because you commented out these methods: numberOfSectionsInTableView and numberOfRowsInSection, your tableView would be 0 section and 0 row,so the method
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath
did not be accessed.