使用UITextField了解resignFirstResponder

Question

I'm trying to get rid of the keyboard when the user touch outside my UITextField, by using this method:

- (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    [mainTextController resignFirstResponder];
    [super touchesBegan:touches withEvent:event];
}

However, this seems to call a method that is called after pressing the return button on the keyboard, but I just want the keyboard to vanish, not to press return for me. How can I accomplish that?

Thanks!

EDIT: tGilani's answer is the most straight-forward way, works like a charm, without changing to UIControl. But I guess jonkroll's answer also works.

Answer 1

try

[self.view endEditing:YES];

Update:

Take a boolean value and set it to false in init method. In your textFieldShouldReturn delegate method method, execute the code if it is false, skip otherwise

- (BOOL) textFieldShouldReturn:(UITextField*)textField
{
    if (!boolean)
    {
        // YOur code logic here
    }
    boolean = false;
}

in your method where you call the endEditing method, set boolean to true.

boolean = YES;      
[self.view endEditing:YES];

Answer 2

Here's how I've handled this before. First create a method on your view controller that will dismiss the keyboard by resigning first responder status on your text field:

- (IBAction)dismissKeyboard:(id)sender
{
    [mainTextController resignFirstResponder];
}

Next, in your storyboard scene for your ViewController (or nib , if you are not using storyboards) change the class of your ViewController's view property from UIView to UIControl . The view property is effectively the background behind your other UI elements. The class type needs to be changed because UIView cannot respond to touch events, but UIControl (which is a direct subclass of UIView ) can respond to them.

Finally, in your ViewController's viewDidLoad: method, tell your view controller to execute your dismissKeyboard method when the view receives a UIControlEventTouchDown event.

- (void)viewDidLoad
{
    [super viewDidLoad];       
    UIControl *viewControl = (UIControl*)self.view;
    [viewControl addTarget:self action:@selector(dismissKeyboard:) forControlEvents:UIControlEventTouchDown];
}

EDIT:

Part of your concern seems to be that textFieldDidEndEditing: is called when the keyboard is dismissed. That is unavoidable, it will always be called whenever a text field loses focus (ie first responder status). It sounds like your problem is that you have put code to perform when the user clicks the return button in textFieldDidEndEditing: . If you do not want that code to run when the user touches outside of the text field, that is not the proper place to put it.

Instead, I would put that code in a separate method:

- (IBAction)textFieldReturn:(id)sender
{
    if ([mainTextController isFirstResponder]) {
            [mainTextController resignFirstResponder];

            // put code to run after return key pressed here...
        }
    }
}

and then call that method via Target-Action when your text field sends the control event UIControlEventEditingDidEndOnExit .

[mainTextController addTarget:self action:@selector(textFieldReturn:) forControlEvents:UIControlEventEditingDidEndOnExit];

Note that UIControlEventEditingDidEndOnExit is different than UIControlEventEditingDidEnd . The former is called when editing ends by the user touching outside the control, the latter is called when editing ends by the user pressing the return key.

Answer 3

You need to change your ViewController's view property from UIView to UIControl using the Identity Inspector:

From there, you simply create an IBAction and tell the textfield to dismiss (which I am assuming is your mainTextController ). If mainTextController is not the textfield you want the keyboard to dismiss on then change the resignFirstReaponder method to your textfield like so.

- (IBAction)backgroundTap:(id)sender {
[myTextField resignFirstResponder];
}

then from there go back into your View Contoller's .xib file and connect the action to the Control View and select "Touch Down".