Question

I am building a converter app. In the main screen I have a text field to input numbers and below the text field a picker view will allow users to select conversion parameters, (for example kg to g).

I can hide the keyboard when user click the background by using the following method

 (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
 [self.enterInput resignFirstResponder];

but when I touch the picker view the keyboard is not hiding.

My question is how to dismiss the keyboard when a user touches the picker view.

Answer 1

Got a solution

1) First Create a hidden roundRect botton and change the type to custom (fit the size of the picker).

2) Create a touch up inside action

 - (IBAction)hiddenButtonToHideKeyboard:(id)sender {
    [self.enterInput resignFirstResponder];
}

3) Create a keyboard appear notification

[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(onKeyboardAppear:) name:UIKeyboardWillShowNotification object:nil];

4) Create a keyboard disappear notification

 [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(onKeyboardHide:) name:UIKeyboardWillHideNotification object:nil];

5) Make the button visible when keyboard is appeared

 -(void)onKeyboardAppear:(NSNotification *)notification
{
    hiddenButtonToHideKeyboard.hidden=NO;
}

6) Hide the button when the keyboard is disappeared

-(void)onKeyboardHide:(NSNotification *)notification
{
    hiddenButtonToHideKeyboard.hidden=YES;
}

5) done

I dont think it is a perfect solution but it works for me 🙂