UISearchBar内部的取消按钮

Question

I am developing an app on XCode 5 and I don't found the answer for this.

Which method is the one that controls that "X" button on the UISearchBar ? I tried with

-(void)searchBarCancelButtonClicked:(UISearchBar *)searchBar

But it doesn't work

Any clue?

Thanks in advance!

Answer 1

This is the method you are looking for

- (BOOL)textFieldShouldClear:(UITextField *)textField; 

But this is UITextFields delegate method and you need to set delegate of UISearchBar's textfield. See this

In your header (.h) file

conform to delegates. <UISearchBarDelegate, UITextFieldDelegate>

- (void)viewDidLoad 
{
          //find the UITextField view within searchBar (outlet to UISearchBar)
          //and assign self as delegate
    for (UIView *view in searchBar.subviews)
    {
            if ([view isKindOfClass: [UITextField class]]) 
            {
                    UITextField *tf = (UITextField *)view;
                    tf.delegate = self;
                    break;
                }
          }
 }

 - (void)searchBarCancelButtonClicked:(UISearchBar *) aSearchBar 
{
     [aSearchBar resignFirstResponder];
}

- (BOOL)textFieldShouldClear:(UITextField *)textField 
{
     [self performSelector:@selector(searchBarCancelButtonClicked:) withObject:self.searchBar afterDelay: 0.1];
    return YES;
}

Answer 2

Try this,

Subclass UISearchBar

@interface CustomSearchBar : UISearchBar

and add delegate method of UITextField

- (BOOL)textFieldShouldClear:(UITextField *)textField

in that class. hope this will help.