Estoy tratando de obtener una celda específica de una vista de tabla para poder cambiar su etiqueta y detener el indicador de actividad.cellForRowAtIndexPath devuelve nil
El problema que tengo es que cellForRowAtIndexPath
devuelve nil.
Mi vista de tabla tiene solo 1 fila.
Código:
- (id) initWithNibName: (NSString*) nibNameOrNil bundle: (NSBundle*) nibBundleOrNil
{
self = [super initWithNibName: nibNameOrNil bundle: nibBundleOrNil];
if (self)
{
numberOfRows = 1;
}
return self;
}
- (NSInteger) tableView: (UITableView*) tableView numberOfRowsInSection: (NSInteger) section
{
return numberOfRows;
}
-(void) stopCellIndicator
{
LiveUserFeedCell* cell = (LiveUserFeedCell*)[self.liveFeed cellForRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0]];
[cell.activityIndicator stopAnimating];
cell.middleLabel.text = @"N/a";
}
- (UITableViewCell*) tableView: (UITableView*) tableView cellForRowAtIndexPath: (NSIndexPath*) indexPath
{
static NSString *CellIdentifier = @"UserFeedCell";
LiveUserFeedCell *cell = (LiveUserFeedCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"LiveUserFeedCell" owner:self options:nil];
cell = (LiveUserFeedCell *)[nib objectAtIndex:0];
}
[cell.imgView setImage:[TUNinePatchCache imageOfSize:cell.imgView.frame.size forNinePatchNamed:@"bg_home_newsfeed_normal"]];
if (shouldDisplayLoading == NO)
{
NSArray* songs = homeScreen.recentPlaybacks.songs;
TWSong* song = [songs objectAtIndex:index];
cell.middleLabel.text = @"";
[cell.activityIndicator stopAnimating];
UIFont *font = [UIFont fontWithName:@"Trebuchet MS" size:14];
NSString* kText =[NSString stringWithFormat:@"<b>%@</b> is listening to %@ by %@",song.user,song.title,song.artist];
for(int i = 14; i > 0; i=i-1)
{
// Set the new font size.
font = [font fontWithSize:i];
// You can log the size you're trying: NSLog(@"Trying size: %u", i);
/* This step is important: We make a constraint box
using only the fixed WIDTH of the UILabel. The height will
be checked later. */
CGSize constraintSize = CGSizeMake(cell.isWatching.frame.size.width, MAXFLOAT);
// This step checks how tall the label would be with the desired font.
CGSize labelSize = [kText sizeWithFont:font constrainedToSize:constraintSize lineBreakMode:UILineBreakModeWordWrap];
/* Here is where you use the height requirement!
Set the value in the if statement to the height of your UILabel
If the label fits into your required height, it will break the loop
and use that font size. */
if(labelSize.height <= cell.isWatching.frame.size.height)
break;
}
cell.isWatching.font = font;
cell.isWatching.text = [TTStyledText textFromXHTML:kText lineBreaks:YES URLs:YES];
cell.isWatching.textAlignment = UITextAlignmentCenter;
++index;
if (index == [songs count])
index=0;
}
else
{
[cell.activityIndicator startAnimating];
}
return cell;
}
Sin embargo, si hago algo como esto, me pongo una célula válida:
NSArray *indexPaths = [NSArray arrayWithObjects:
[NSIndexPath indexPathForRow:0 inSection:0],
nil];
numberOfRows = 0;
[self.liveFeed deleteRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationLeft];
numberOfRows = 1;
[self.liveFeed insertRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationRight];
LiveUserFeedCell* cell = (LiveUserFeedCell*)[self.liveFeed cellForRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0]];
[cell.activityIndicator stopAnimating];
cell.middleLabel.text = @"N/a";
alguna idea de cómo solucionar este problema? (Tal vez la primera celda por defecto no está en la fila 0 0 sección?) Primordial
No puedo ver dónde está anulando cellForRowAtIndex. Mientras no lo hagas, no habrá células. – Krumelur
Agregó más código ... eche un vistazo ahora. thx – Idan