Returning more cells in a UITableView - iphone

Question

I am using MGTwitterEngine and have almost EVERYTHING figured out, but for some reason I cannot figure out how to return more tweets in my timeline! It receives around 20 tweets by the method I am using and if I add a integer for example: return count = 100;, I can tell I now have 100 cells when it loads and by the scroll indicator but when I scroll to that 18- 19 cell I get this error:
SIGABRT
-[NSMutableArray objectAtIndex:]: index 20 beyond bounds [0 .. 19]'
* Call stack at first throw:
I know what it means: theres no more information to receive at cell 20. I'm baffled and went in and out of MGTwitterEngine looking for a default tweet count but I can't find it. I am using the dump to create my NSStrings and the dump only seems to give around 20 tweets per login. Please help, any suggestions are good in my book! Thank you!
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
int count = [tweets count];
// Return just enough cells to fill the screen during loading ....
if (count == 0)
count = MyCustomRowCount;
else {
//Here is where I think I need to add a else return integer but dont know how
}
return count;
return [tweets count];
return [authors count];
return [avatarsURL count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *identifier = #"cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
if (cell == nil) {
[cell autorelease];
}
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:#"cell"]autorelease];
/*
//Here it adds a nice shadow to the table view but will crash on rotation and send a
wird dump !!!????
tableView.layer.shadowColor = [[UIColor blackColor] CGColor];
tableView.layer.shadowOffset = CGSizeMake(1.0f, 1.0f);
tableView.layer.shadowRadius = 8.0f;
tableView.layer.shadowOpacity = 1.0f;
*/
[cell.textLabel setNumberOfLines:1];
[cell.textLabel setText:[(Tweet*)[authors objectAtIndex:indexPath.row] author]];
[cell.detailTextLabel setText:[(Tweet*)[tweets objectAtIndex:indexPath.row] tweet]];
[cell.detailTextLabel setNumberOfLines:10];
[cell.textLabel setTextColor:[UIColor darkGrayColor]];
[cell.textLabel setShadowColor:[UIColor whiteColor]];
[cell.textLabel setShadowOffset:CGSizeMake(0.5, 0.5)];
[cell.detailTextLabel setTextColor:[UIColor blackColor]];
//[cell.detailTextLabel setText:[(Tweet*)[retweetCount objectAtIndex:indexPath.row]
reTweetCount]];
[cell.textLabel setUserInteractionEnabled:YES];
[cell.contentView setMultipleTouchEnabled:YES];
// cell.text = [[NSString alloc] initWithFormat:#"Cell :%i", indexPath.row];
// Here we use the new provided setImageWithURL: method to load the web image with
SDWebImageManager
[cell.imageView setImageWithURL:[NSURL URLWithString:[(Tweet*)[avatarsURL
objectAtIndex:indexPath.row]avatarURL]]
placeholderImage:[UIImage imageNamed:#"avatar.png"]];
//add gradient to cell
UIImage *gradient = [UIImage imageNamed:#"gradientcell2.png"];
UIImageView *cellimage = [[UIImageView alloc] initWithImage:gradient];
cellimage.contentMode = UIViewContentModeScaleToFill;
cell.backgroundView = cellimage;
[cellimage release];
UIImage *selectedGradient = [UIImage imageNamed:#"selectedcell.png"];
UIImageView *selectedCell = [[UIImageView alloc] initWithImage:selectedGradient];
selectedCell.contentMode = UIViewContentModeScaleToFill;
cell.selectedBackgroundView = selectedCell;
[tableView setBackgroundColor:[UIColor clearColor]];
return cell;
}
//get cell accessory
-(UITableViewCellAccessoryType)tableView:(UITableView *)tableView
accessoryTypeForRowWithIndexPath:(NSIndexPath *)indexPath {
if(indexPath.row < [tweets count]){
}
return UITableViewCellAccessoryDisclosureIndicator;
}
// custom hieght
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath*)indexPath {
return 80;
}
//select tweet bring to detail view ..... Also bring in the Users information who made the tweet!
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath*)indexPath {
//Get the selected tweets
NSString *selectedTweet = [(Tweet*)[tweets objectAtIndex:indexPath.row] tweet];
NSString *selectedUser = [(Tweet*)[tweets objectAtIndex:indexPath.row] author];
NSString *selectedUserInfo = [(Tweet*)[tweets objectAtIndex:indexPath.row] user];
NSString *retweetCount = [(Tweet*)[tweets objectAtIndex:indexPath.row] reTweetCount ];
// NSString *selectedUserFriendsCount = [(Tweet*)[tweets objectAtIndex:indexPath.row] userFriendsCount];------HUH? NO soup for ME!
NSString *selectedUserFollowersCount = [(Tweet*)[tweets objectAtIndex:indexPath.row] userFollowersCount];
//Initialize the detail view controller and display it.
TwitterDetailViewController*dvController = [[TwitterDetailViewController alloc]
initWithNibName:#"TwitterDetailViewController" bundle:[NSBundle mainBundle]];
dvController.selectedTweet = selectedTweet;
dvController.selectedUser = selectedUser;
dvController.selectedUserInfo = selectedUserInfo;
// dvController.selectedUserFriendsCount = selectedUserFriendsCount;------Doesnt reconize the call for some odd reason!
dvController.selectedUserFollowersCount = selectedUserFollowersCount;
dvController.retweetCount = retweetCount;
dvController.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentModalViewController:dvController animated:YES];
//[self.navigationController pushViewController:webController animated:YES];-------would rather use navagation controller for several obvious reasons
[dvController release];
dvController = nil;
}

Answer 1

UITableView doesn't it like it when you gave it something inconsistant. If you change the model, you need to call [tableView reloadData] or if you want to animate the changes call [tableView beingUpdate][tableView endUpdate] with all the insert/remove cell operations in the middle.
On another note, I'm not sure why you doing here:
NSString *identifier = #"cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
if (cell == nil) {
[cell autorelease];
}
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle
reuseIdentifier:#"cell"];
[cell autorelease];
First if (cell == nil), calling auto release on it won't do anything.
The reuse identifier thing is a flyweight pattern. If dequeueReusableCellWithIdentifier: returns nil, it means it doesn't have a cell object in the pool for you to use and you should alloc a new one for it. dequeueReusableCellWithIdentifier also already returns an autorelease object.
Instead try this:
NSString *identifier = #"mytweetcell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:identifier] autorelease];
}