带有文本字段和按钮的Tableview单元格

Question

I have a tableviewcell that has two text fields and a button. The idea is that you fill in the text field, but the button will bring up another viewcontroller that has some sort of calculator.

My problem comes with bringing the value back into the right cell and textfield.

I get at the button click with this in the Configure cell;

[cell setDidTapButtonBlock:^(id sender) {
    [self countNotes:cashoutLine.cashCurrency cell:cell];

}];

This calls this extract of code;

-(void)countNotes:(Currency *)cashCurrency cell:(PouchEntryViewCell *)cell
{

    NotesCountViewController *notesCountVC = [[NotesCountViewController alloc] init];
    notesCountVC.noteCurrency = cashCurrency;

    notesCountVC.notesDelegate = self;

     notesCountVC.modalPresentationStyle = UIModalPresentationFormSheet;
    [self presentViewController:notesCountVC animated:YES completion:nil];
}

All good and the new viewcontroller shows up. I do the work there and pass back the total using delegate. It arrives happily in the first view controller, but then I'm stuck. How can I get it to populate the correct cell?

Answer 1

In NotesCountViewController

- (id) initWithIndexPath:(NSIndexPath *) indexPath {

    self = [super init];

    if (self) {
        self.indexPath = indexPath;
    }

    return self;
}

Declare this in your .h and also add an indexPath property.. Then just add the self.indexPath in your delegate call back.

To call it just do:

NotesCountViewController *notesCountViewController = [[NotesCountViewController alloc] initWithIndexPath:[self.tableView indexPathForCell:cell];

Then to retrieve the cell in the del callback:

UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indexPath];

Answer 2

Assuming you're presenting the calculator from the ViewController that acts as the UITableViewDataSource delegate, you can find the correct cell to update the textfield by creating a NSIndexPath property in your NotesCountViewController. Before you present the view controller, set the property. When it is dismissed, pass the NSIndexPath back to your UITableViewDataSource viewController, and find the correct cell with that.

-(void)countNotes:(Currency *)cashCurrency cell:(PouchEntryViewCell *)cell atIndex:(NSIndexPath *)indexPath
{
    NotesCountViewController *notesCountVC = [[NotesCountViewController alloc] init];
    notesCountVC.noteCurrency = cashCurrency;

    notesCountVC.cellIndexPath = indexPath;

    notesCountVC.notesDelegate = self;
    notesCountVC.modalPresentationStyle = UIModalPresentationFormSheet;
    [self presentViewController:notesCountVC animated:YES completion:nil];
}

Then get the cell in the Delegate callback with

PouchEntryViewCell *cell = (PouchEntryViewCell *)[self.tableView cellForRowAtIndexPath:indexPath];
cell.textField.text = @"New Text";