How to get cell indexpath in uitextfield Delegate Methods?

Question

I have two textfields in a custom cell how to get the indexpath value of Tableview cell in textfield delegate methods I want to get the input value from user and save it to

Answer 1

Try this method to get textfield dynamically anywhere from your tableview controller

 #pragma mark - Get textfield indexpath
- (NSIndexPath *)TextFieldIndexpath:(UITextField *)textField
{
    CGPoint point = [textField.superview convertPoint:textField.frame.origin toView:self.TblView];
    NSIndexPath * indexPath = [self.TblView indexPathForRowAtPoint:point];
    NSLog(@"Indexpath = %@", indexPath);
    return indexPath;
}

Answer 2

This is how I have been doing it and have been having better luck. I grab the origin of the textField frame. Convert that to a point. Then convert the point to an index path.

-(void)textFieldDidBeginEditing:(UITextField *)textField
{
    CGPoint origin = textField.frame.origin;
    CGPoint point = [textField.superview convertPoint:origin toView:self.tableView];

    NSIndexPath * indexPath = [self.tableView indexPathForRowAtPoint:point];

    [self.tableView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionMiddle animated:YES];

}

Answer 3

I find this answer searching how can I find the index path of a cell with inside a UITextField.

So, thanks to the answer above, I put my code here, hoping might be usefull.

- (void)searchSelectedIndexPath:(UIView*)view {
    // This allow to find selected index path for a table view cell with a text field inside.
    for (UIView* subview in view.subviews) {
        if ([view isKindOfClass:[UITextField class]]) {
            if ([view isFirstResponder]) {
                UIView *cell = view;
                while (cell && ![cell isKindOfClass:[UITableViewCell class]]) {
                    cell = cell.superview;
                }
                self.selectedIndexPath = [self.tableView indexPathForRowAtPoint:cell.center];
                return;
            }
        }
        [self searchSelectedIndexPath:subview];
    }
}

In this way, when keyboard notification will be raise:

- (void)keyboardDidShow:(NSNotification*)notification {
    [self searchSelectedIndexPath:self.tableView];
}

Answer 4

In case somebody like me needs @Kerkness' answer (this one really worked for me) in swift:

func textFieldDidBeginEditing(_ textField: UITextField) {
    let origin: CGPoint = textField.frame.origin
    let point: CGPoint? = textField.superview?.convert(origin, to: tableView)
    let indexPath: IndexPath? = tableView.indexPathForRow(at: point ?? CGPoint.zero)
    tableView.scrollToRow(at: indexPath!, at: .middle, animated: true)
}

It should be straight forward enough: you get the point then you get the indexPath and do whatever you need with it!

Answer 5

This can be done in the Objective-C runtime for any instance (doesn't have to be UITextField), with any associated object (doesn't have to be NSIndexPath).

For this question, we could create a category UIView+RepresentingIndexPath.

Our interface allows us to set and retrieve an NSIndexPath:

@interface UIView (RepresentingIndexPath)
- (void)representIndexPath:(NSIndexPath *)indexPath;
- (NSIndexPath *)representedIndexPath;
@end

Our implementation uses Objective-C associated objects to set and retrieve an index path on a view:

#import "UIView+RepresentingIndexPath.h"
#import <objc/runtime.h>

static char IndexPathKey;

@implementation UIView (RepresentingIndexPath)

- (void)representIndexPath:(NSIndexPath *)indexPath
{
    objc_setAssociatedObject(self, &IndexPathKey, indexPath, OBJC_ASSOCIATION_COPY_NONATOMIC);
}

- (NSIndexPath *)representedIndexPath
{
    return objc_getAssociatedObject(self, &IndexPathKey);
}

@end

In action:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    TextFieldTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"TextFieldCell" forIndexPath:indexPath];
    [cell.textField addTarget:self action:@selector(textFieldTextChanged:) forControlEvents:UIControlEventEditingChanged];
    [cell.textField representIndexPath:indexPath];
    return cell;
}

- (void)textFieldTextChanged:(UITextField *)sender
{
    NSIndexPath *indexPath = [sender representedIndexPath];
    NSLog(@"%@", indexPath);
}