How to get UITextField from inputAccessoryView button click - ios

Question

I have a dynamic number of UITextFields which all have an inputAccessoryView. This is composed of a UIToolbar which has a button on it. When this button is pressed it calls a method, however, within this method I somehow need the ability to access the underlying UITextField.
Please could someone advise how this is possible?
// Create the toolbar controls
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithTitle:#"Done" style:UIBarButtonItemStyleDone target:self action:#selector(navigationBarDoneButtonPressed:)];
UIBarButtonItem *flexibleSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
// Setup the toolbar
navigationToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(10.0, 0.0, 310.0, 40.0)];
[navigationToolbar setItems:#[flexibleSpace, doneButton]];
// In a UITableView I create a number of cells which contain UITextFields....
// This is the method that gets called when a user presses the done button
- (void)navigationBarDoneButtonPressed:(id)sender
{
NSLog(#"Based on sender I need to access the underlying UITextField.");
}

Answer 1

You can keep track of the currently focused UITextField in a variable, and use that variable in your inputAccesoryView method:
in your .h file: make sure you're conforming to the UITextFieldDelegate protocol:
#interface MyViewController : UIViewController <UITextFieldDelegate>
and add this property:
#property (assign, nonatomic) UITextField *activeTextField;
In your .m file: While creating your dynamic textfields:
...
theTextField.delegate=self;
...
And add these implementations of the UITextFieldDelegate protocol:
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
self.activeTextField = textField;
}
- (void)textFieldDidEndEditing:(UITextField *)textField
{
self.activeTextField = nil;
}
And now, in the method invoked by your inputAccesoryView:
- (void)navigationBarDoneButtonPressed:(id)sender{//Just an example
self.activeTextField.text=#"Test";
}

Answer 2

I would create UITableViewCell subclass with delegate, e.g.
MyTextEditTableViewCell.h
#class MyTextEditTableViewCell;
#protocol MyTextEditTableViewCellDelegate <NSObject>
- (void)didDoneButtonPressed:(MyTextEditTableViewCell *)sender;
#end
#interface MyTextEditTableViewCell : UITableViewCell
#property (nonatomic, weak) id<MyTextEditTableViewCellDelegate> delegate;
#property (nonatomic, strong) UITextField *textField;
#end
MyTextEditTableViewCell.m
#implementation MyTextEditTableViewCell
- (void)navigationBarDoneButtonPressed:(id)sender
{
// Call delegate
if (self.delegate)
[self.delegate didDoneButtonPressed:self];
}
#end
Your UIViewController subclass (Or UITableViewController)
...
- (void)didDoneButtonPressed:(MyTextEditTableViewCell *)sender {
UITextField *cellTextField = sender.textField;
// do some stuff with text field
}
Don't forget to set delegate to cell when you will config it.