iPhone perform action when UITextField / UISearchBar's clear button is pressed

Question

Is it possible to gain access to a delegate method that will allow additional actions to be performed when the "clear" button is pressed on a UITextField / UISearchBar?

Thanks

check out the answer here http://stackoverflow.com/questions/1092246/uisearchbar-clearbutton-forces-the-keyboard-to-appear — Hiren, May 16 '12 at 11:37

score 35 · Answer 1 · answered Mar 08 '10 at 21:44

See: UITextFieldDelegate Protocol Reference

If you set your view controller as the delegate for your text field (can be done in interface builder), you can use:

- (void)clearSearchTextField
{
  ...
}

- (BOOL)textFieldShouldClear:(UITextField *)textField
{
  if (textField == self.searchTextField) [self clearSearchTextField];
  return YES;
}

score 7 · Answer 2 · answered Sep 14 '17 at 22:07

7

For Swift 3:

To perform an action when the "clear" button is pressed on a UITextField

func textFieldShouldClear(_ textField: UITextField) -> Bool {
    if textField == yourTextFieldName {
        // do some action
    }
    return true
}

answered Sep 14 '17 at 22:07

Rbar

3,740
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score 1 · Answer 3 · answered Mar 08 '16 at 20:05

For a UISearchBar you will want to implement func searchBar(searchBar: UISearchBar, textDidChange searchText: String).

This is triggered before func searchBarTextDidBeginEditing(searchBar: UISearchBar) and before func searchBar(searchBar: UISearchBar, shouldChangeTextInRange range: NSRange, replacementText text: String) -> Bool as well.

You implementation should look something like this:

func searchBar(searchBar: UISearchBar, textDidChange searchText: String) {
        if searchText == "" {
            //Code to execute when search is cleared
        }
    }

It is called, even if I clear text by backspace. But how to detect total clear text? — avdyushin, Apr 27 '16 at 10:46

score 0 · Answer 4 · edited May 16 '12 at 11:15

When you clear the text field several events will happen that you will have access to through either the UISearchDisplayDelegate or the UISearchBarDelegate such as searchBar:textDidChange and searchDisplayController:shouldReloadTableForSearchString

This will also cause the search table to hide so it will trigger

searchDisplayController:willHideSearchResultsTableView  
searchDisplayController:didHideSearchResultsTableView

When the search table will hide you can check if the search text is empty and then do whatever you need to do.

score -1 · Answer 5 · edited May 23 '17 at 12:10

-1

See my answer here: https://stackoverflow.com/a/3852509/91458 – it’s for a searchBar but should apply to a textField as well.

edited May 23 '17 at 12:10

Community

1
1

answered Dec 18 '13 at 19:01

boliva

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iPhone perform action when UITextField / UISearchBar's clear button is pressed

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