UITableView inside UIView - data loads only when scrolling cells outside uitableview - ios

Question

I have a problem using a UITableView inside a UIViewController:
When I start the app the UITableView is shown, but the data from _opponents isn't shown.
When I start scrolling the first cell outside the UITableView, now this cell gets updated.
Also, when I trigger [_topponents reloaddata] manually, the whole UITableView shows the correct data.
What do I have to add or change, so that the data is shown from the beginning?
dataSource and delegate are both connected with the class in the storyboard
Here is my code:
viewDidLoad:
- (void)viewDidLoad {
[super viewDidLoad];
myappdel = (AppDelegate *)[UIApplication sharedApplication].delegate;
self.title = #"New Match";
_lopponent.text = _opponent;
opponents = [[NSMutableArray alloc] init];
NSMutableDictionary *opponent = [[NSMutableDictionary alloc] init];
[opponent setObject:#"opponent A" forKey:#"name"];
[opponent setObject:#"xx matches | xx wins || xx losts" forKey:#"stats"];
[opponent setObject:#"Krems" forKey:#"location"];
NSMutableDictionary *opponent2 = [[NSMutableDictionary alloc] init];
[opponent2 setObject:#"opponent B" forKey:#"name"];
[opponent2 setObject:#"yy matches | yy wins || yy losts" forKey:#"stats"];
[opponent2 setObject:#"Location B" forKey:#"location"];
NSMutableDictionary *opponent3 = [[NSMutableDictionary alloc] init];
[opponent3 setObject:#"opponent C" forKey:#"name"];
[opponent3 setObject:#"zz matches | zz wins || zz losts" forKey:#"stats"];
[opponent3 setObject:#"Location C" forKey:#"location"];
[opponents addObject:opponent];
[opponents addObject:opponent2];
[opponents addObject:opponent3];
[_topponents reloadData];
}
and here my cellForRowAtIndexPath:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"opponentcell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
UILabel *lopponentname = (UILabel*)[cell viewWithTag:1];
UILabel *lopponentstats = (UILabel*)[cell viewWithTag:2];
UILabel *llocation = (UILabel*)[cell viewWithTag:3];
lopponentname.text = [[opponents objectAtIndex:indexPath.row] objectForKey:#"name"];
lopponentstats.text = [[opponents objectAtIndex:indexPath.row] objectForKey:#"stats"];
llocation.text = [[opponents objectAtIndex:indexPath.row] objectForKey:#"location"];
return cell;
}

Answer 1

I found my fault!
I used to write:
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]
but I should use
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
with "forIndexPath"

Answer 2

I think, the trouble is in the cell. Create UITableViewCell subclass.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"opponentcell";
CustomTableViewCell *cell = (CustomTableViewCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
cell.lopponentname.text = [[opponents objectAtIndex:indexPath.row] objectForKey:#"name"];
cell.lopponentstats.text = [[opponents objectAtIndex:indexPath.row] objectForKey:#"stats"];
cell.llocation.text = [[opponents objectAtIndex:indexPath.row] objectForKey:#"location"];
return cell;
}
Hope it helps you.

Answer 3

Add this after initialisation of cell. For me works properly.
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
}

Answer 4

I think you are using custom cel and it looks you have trouble in "cellForRowAtIndexPath". If you using .xib, you may find it useful.
static NSString *cellIdentifier = #"opponentcell";
CustomTableViewCell *cell = (CustomTableViewCell *)[tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if (cell == nil) {
NSArray *nibObjects =[[NSBundle mainBundle] loadNibNamed:#"CustomTableViewCell" owner:nil options:nil];
for (id currentObject in nibObjects)
{
if ([currentObject isKindOfClass:[CustomTableViewCell class]])
{
cell = (CustomTableViewCell *) currentObject;
}
}
[cell initViewStyles];
}

Answer 5

You need to check for condition when cell is nil..
Initially the cell is nil..
So the data is loading only after scrolling...
Add below lines of code in your cellForRowAtIndexPath delegate method after initializing cell.
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
Hope this fixes the issue...