UISearchBar Cancel Button

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别那么骄傲
别那么骄傲 2021-02-20 03:35

Using a UISearchBar with showCancelButton=YES on iOS 5. Would like the cancel button to stay enabled when the keyboard drops down. Using the following code seems not to work:<

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  • 2021-02-20 04:22

    I know this one is old, but I was able to solve it and I couldn't find anything else on SO that solved it for me, so here's what worked (in Swift 3):

    Enable the cancel button when the keyboard hides. Add this to viewDidLoad():

    NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardNotification(notification:)), name: NSNotification.Name.UIKeyboardDidHide, object: nil)
    

    in the keyboardNotification(notification:) method, react to the keyboardDidHide notification:

    func keyboardNotification(notification: NSNotification) {
        if notification.name == Notification.Name.UIKeyboardDidHide {
            self.enableSearchCancelButton()
        }
    }
    

    The enableSearchCancelButton is taken from what others have answered here.

    func enableSearchCancelButton() {
        //enable the cancel button
        for view1 in searchBar.subviews {
            for view2 in view1.subviews {
                if let button = view2 as? UIButton {
                    button.isEnabled = true
                    button.isUserInteractionEnabled = true
                }
            }
        }
    }
    

    Finally, don't forget to remove the view controller as an observer:

    deinit {
        NotificationCenter.default.removeObserver(self)
    }
    
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  • 2021-02-20 04:26

    Just to improve upon what Kurt Spindler said on his post. Though this might not be superior but it is more contained. I use dispatch to do the same thing.

    -(void)searchBarTextDidEndEditing:(UISearchBar *)searchBar{
        for (UIView *subview in searchBar.subviews)
        {
            if ([subview isKindOfClass:[UIButton class]])
            {
                int64_t delayInSeconds = .001;
                dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);
                dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
                    UIButton * cancelButton = (UIButton *)subview;
                    [cancelButton setEnabled:YES];
                });
                break;
            }
        }
    }
    

    This should work for everyone who needs help keep cancel enabled. Make sure that you hide it later either with the cancel or Search clicked.

    - (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar{
        [searchBar resignFirstResponder];
        [searchBar setShowsCancelButton:NO animated:YES];
    }
    
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  • 2021-02-20 04:32

    Swift 5:, Swift 4:

    if let btnCancel = searchBar.value(forKey: "cancelButton") as? UIButton {
        btnCancel.isEnabled = true
    }
    
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  • 2021-02-20 04:32

    I had to solve the same problem in my application. Try doing your above code after a fractional delay, e.g.

    [self performSelector:@selector(delayedEnable:) withObject:cancelButton afterDelay:0.001];
    
    - (void)delayedEnable:(UIButton*)button {
        button.enabled = YES;
    }
    

    It's ugly, but that's what it took to work for me. Alternatively, if you actually use a UISearchDisplayController to display the results, it should also fix the cancel button behavior for you (I think - I've delved into this issue less).

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  • 2021-02-20 04:35

    I placed a custom cancel button over the search bar cancel button.

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  • 2021-02-20 04:42

    Set your searchbar delegate and than put this code.

    - (void) searchBarSearchButtonClicked:(UISearchBar*) theSearchBar
      {
         [theSearchBar resignFirstResponder];
         [theSearchBar setShowsCancelButton:NO animated:YES];
      }
     - (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar
      {
         [searchBar setShowsCancelButton:YES animated:YES];
      }
      - (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar
      {
         [searchBar resignFirstResponder];
         [searchBar setShowsCancelButton:NO animated:YES];
      }
    

    Swift 3.0

    func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
         searchBar.resignFirstResponder()
         searchBar.setShowsCancelButton(false, animated: true)
    }
    func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {
         searchBar.setShowsCancelButton(true, animated: true)
    }
    func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
         searchBar.resignFirstResponder()
         searchBar.setShowsCancelButton(false, animated: true)
    }
    
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