iPhone SDK: Making UITextField text in a custom UITableViewCell persist through scrolls? - iphone

Question

I'm aware that to preserve memory usage, UITableViewCells are reused when scrolling. I have some custom UITableViewCells that have UITextFields in them. After text is inputted to the UITextField, and I scroll, that text is lost because of the cell reuse.
How can I make this text persist through scrolls? I'm thinking I can store each cell's text in its own index of an NSMutableArray. Then, when the cell is reused, I can repopulate it with the array data.
How would I go about doing this? Would someone be so kind as to post a code sample?

Answer 1

sample.h
#interface sample : UIViewController <UITableViewDataSource,UITableViewDelegate,UITextFieldDelegate>
{
}
#end
sample.m
-(void)viewWillAppear:(BOOL)animated
{
arrData = [[NSMutableArray alloc]init];
for (int i=0; i<10; i++) // 10- number of fields
[arrData addObject:#""];
}
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return [arrData count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
UITextField *txt = [[UITextField alloc]initWithFrame:frm];
txt.autocorrectionType = UITextAutocorrectionTypeNo;
txt.tag = indexPath.row;
txt.delegate = self;
txt.text = [arrData objectAtIndex:indexPath.row];
[cell addSubview:txt];
[txt release];
return cell;
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
}
-(BOOL)textFieldShouldReturn:(UITextField *)textField
{
[arrData replaceObjectAtIndex:[textField tag] withObject:textField.text];
}