O botão 'dispensar teclado' do iPad não dispensa teclado

Question

Eu tenho um UITextField em uma visualização Paisagem e quando pressiono o botão 'dispensar teclado' no canto inferior direito da visualização UIKeyboard, o teclado NÃO desaparece.Existe uma maneira de ouvir programaticamente quando essa tecla foi pressionada?Ou há uma conexão que não estou vendo que fará com que este teclado desapareça? Este é o iOS 4 e o XCode 4. Obrigado.

Answer 1

I had same problem today and I wondered, wy it works in Apple's KeyboardAccessory Sample Code. So I did reverse engineering. The ViewController was not the mistake I made in my case.

In the implementation of UIApplicationDelegate there is the entry point of application, where root viewcontroller and window will be setup - (void) applicationDidFinishLaunching:(UIApplication *)application. If you forgot to add root viewcontrollers view to window as subview, the dismiss-keyboard-button wouldn't work in any view of your app.

@class ViewController;

@interface KeyboardAccessoryAppDelegate : NSObject <UIApplicationDelegate> {
  UIWindow *window;
  ViewController *viewController;
}

  @property (nonatomic, retain) IBOutlet UIWindow *window;
  @property (nonatomic, retain) IBOutlet ViewController *viewController;

@end

...

- (void)applicationDidFinishLaunching:(UIApplication *)application {    

  [window addSubview:viewController.view];
  [window makeKeyAndVisible];
}

Please don't forget to setup the outlets in the main xib file.

I dont know why this is related to keyboards behavior. But my theory is, that the responder chain is not linked to window, but it needs.

Answer 2

To dismiss the keyboard using the dismiss keyboard button you need to implement the delegate method

- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
    //Check if your text field is first responder, and if it is, have it resign
}

Alternatively, if you want to dismiss the keyboard by tapping outside of it, use

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    for (UIView* view in self.view.subviews)
    {
        if ([view isKindOfClass:[UITextField class]]) {
            [view resignFirstResponder];
        }

        if ([view isKindOfClass:[UITextView class]]) {
            [view resignFirstResponder];
        }
    }
}

Answer 3

you need to tell the text field that is accepting the keyboard input to no longer be the first responder.

[UITextField resignFirstRepsonder];