Delegate method for UITextField not being called

Question

I have a tableView cell with a UITextField to enter the text. I am populating the tableView with the following code:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *cellIdentifier = @"Ingredient Cell";
    IngredientsTableViewCell *ingredientCell = [self.ingredientsTableView dequeueReusableCellWithIdentifier:cellIdentifier];

   // NSManagedObjectContext *managedObject = [self.ingredientItems objectAtIndex:indexPath.row];
    if (ingredientCell == nil)
    {
        ingredientCell = [[IngredientsTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
        ingredientCell.accessoryType = UITableViewCellAccessoryNone;
        [ingredientCell addSubview:ingredientCell.ingredientTextField];
        [ingredientCell.ingredientTextField addTarget:self action:@selector(editingChanged:) forControlEvents:UIControlEventEditingChanged];

    }

    //Populate the textfield in the ingredientCell
    ingredientCell.ingredientTextField.text = [self.ingredientItems objectAtIndex:indexPath.row];

    return ingredientCell;
}

Following is the @selector(editingChanged:) method for the textField which never executes. What am I doing wrong?

-(void) editingChanged:(id)sender{
    NSLog(@"hi");

    // get the text being entered
    NSString *ingredientText = ((UITextField *)sender).text;

    //get the index of the selected row
    NSInteger selectedIndex = [self.ingredientsTableView indexPathForSelectedRow].row;

    //save the text to the array
    [self.ingredientItems setObject:ingredientText atIndexedSubscript:selectedIndex];
}

Answer 1

So you'll want to use the textFieldDelegate (or if you're adventurous you could use ReactiveCocoa).

Add this at the top

<UITextFieldDelegate>

And this in your cellForRowAtIndexPath

ingredientCell.ingredientTextField.delegate = self;
ingredientCell.ingredientTextField.tag = 1;

And this delegate method

//Use this method instead of addTarget:
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField {
    if (textField.tag == 1){
        //do some stuff
    }
}

see this stack overflow post: iOS - Adding Target/Action for UITextField Inside Custom UITableViewCell

But you might have a slightly different problem as well. This line of code seems redundant:

[ingredientCell addSubview:ingredientCell.ingredientTextField];

You're ingredient cell seems like it should already have the ingredientTextField as a subview. This might cause you problems as well. You can add it as a subview in a xib that's attached to your ingredientsTableViewCell class, or simply add it in code as

[self addSubview:ingredientTextField]

Hope that helps.

Answer 2

if (ingredientCell == nil)
{
    ingredientCell = [[IngredientsTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
    ingredientCell.accessoryType = UITableViewCellAccessoryNone;
    [ingredientCell addSubview:ingredientCell.ingredientTextField];
    [ingredientCell.ingredientTextField addTarget:self action:@selector(editingChanged:) forControlEvents:UIControlEventEditingChanged];

}

this portion looks much of problems try taking out this line from if statement

[ingredientCell.ingredientTextField addTarget:self action:@selector(editingChanged:) forControlEvents:UIControlEventEditingChanged];

This will help you.

Answer 3

You can add this line in cellForRowAtIndexPath and add UITextFieldDelegate in Viewcontroller.h file

ingredientCell.ingredientTextField.delegate = self;
[ingredientCell.ingredientTextField addTarget:self action:@selector(editingChanged:) forControlEvents:UIControlEventEditingChanged];

This is textfield controller event

UIControlEventEditingDidBegin     = 1 << 16,     // UITextField
UIControlEventEditingChanged      = 1 << 17,
UIControlEventEditingDidEnd       = 1 << 18,
UIControlEventEditingDidEndOnExit = 1 << 19,     // 'return key' ending editing