Detecting backspace in UITextField the right way - iphone

Question

Attention! This question is not a duplicate of this or this question! This is a new question to make things more clear.
So I have followed all the instructions of the posts above and I have this UITextField that becomes empty and moves to a new position every time the user hits return button. Moreover, I trace the input of the textView and I create a label of that text in the position the TextView was, like this:
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
if (textField.text.length > 5) {
CGRect labelFrame = CGRectMake(textField.frame.origin.x, textField.frame.origin.y, 0, 0);
UILabel *label = [[UILabel alloc] initWithFrame: labelFrame];
label.font = [UIFont fontWithName:#"HelveticaNeue" size:14];
[label setText:textField.text];
[label setTextColor: [BSFunctions getColorFromHex:#"3f3f3f"]];
label.backgroundColor =[UIColor lightGrayColor];
[label sizeToFit];
[labelsArray addObject:label];
[self.view addSubview: label];
CGRect newTextFieldFrame = CGRectMake(labelFrame.origin.x + label.frame.size.width + 5, labelFrame.origin.y, 320, 30);
NSLog(#"Rect is %#", NSStringFromCGRect(newTextFieldFrame));
textField.frame = newTextFieldFrame;
textField.text = #"\u200B";
}
return YES;
}
I set the text in UITextField text to be #"\u200B" and I then want to detect the backspace button on it like this:
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{
if ([string isEqualToString:#""]) {
NSLog(#"backspace button pressed");
if (labelsArray.count > 0) {
UILabel *labelToDelete = [labelsArray lastObject];
CGRect labelPosition = labelToDelete.frame;
CGRect oldPosition = textField.frame;
textField.frame = CGRectMake(labelPosition.origin.x, labelPosition.origin.y, oldPosition.size.width, oldPosition.size.height);
[labelToDelete removeFromSuperview];
[labelsArray removeLastObject];
textField.text = #"\u200B";
}
}
return YES;
}
But the problem is, it works only once and then, even with the special character added at the beginning of the textField it doesn't work. What is possibly wrong?

Answer 1

After setting
textField.text = #"\u200B";
in textField:shouldChangeCharactersInRange:replacementString:
You will have to add
return NO;
otherwise it will continue to the return YES and replace it with a #"" and then when pressing the backspace once again nothing will be changed and the delegate method will not be called.
It is possible that I misunderstood your goal here, but I hope this helps.