iPhone keyboard, Done button and resignFirstResponder - iphone

Question

This is probably a dumb question, but I can't find the answer in the docs. Did the "Done" button on the pop-up keyboard always cause the keyboard to disappear? I see a lot of code around the web like this:
- (BOOL)textFieldShouldReturn:(UITextField *)theTextField {
[theTextField resignFirstResponder];
return YES;
}
When I press the "Done" button, the keyboard pops down and the UITextField resigns first responder.
I'm presuming that pressing the "Done" button didn't used to cause a UITextField to resignFirstResponder, but that behavior changed at some time.
I'm debugging on OS 3.0 - 3.1.3

Answer 1

I made a small test project with just a UITextField and this code
#import <UIKit/UIKit.h>
#interface TextFieldTestViewController : UIViewController
<UITextFieldDelegate>
{
UITextField *textField;
}
#property (nonatomic, retain) IBOutlet UITextField *textField;
#end
#import "TextFieldTestViewController.h"
#implementation TextFieldTestViewController
#synthesize textField;
- (void)viewDidLoad
{
[self.textField setDelegate:self];
[self.textField setReturnKeyType:UIReturnKeyDone];
[self.textField addTarget:self
action:#selector(textFieldFinished:)
forControlEvents:UIControlEventEditingDidEndOnExit];
[super viewDidLoad];
}
- (IBAction)textFieldFinished:(id)sender
{
// [sender resignFirstResponder];
}
- (void)dealloc {
[super dealloc];
}
#end
The text field is an unmodified UITextField dragged onto the NIB, with the outlet connected.
After loading the app, clicking in the text field brings up the keyboard. Pressing the "Done" button makes the text field lose focus and animates out the keyboard. Note that the advice around the web is to always use [sender resignFirstResponder] but this works without it.

Answer 2

In Xcode 5.1
Enable Done Button
In Attributes Inspector for the UITextField in Storyboard find the field "Return Key" and select "Done"
Hide Keyboard when Done is pressed
In Storyboard make your ViewController the delegate for the UITextField
Add this method to your ViewController
-(BOOL)textFieldShouldReturn:(UITextField *)textField
{
[textField resignFirstResponder];
return YES;
}

Answer 3

From the documentation (any version):
It is your application’s
responsibility to dismiss the keyboard
at the time of your choosing. You
might dismiss the keyboard in response
to a specific user action, such as the
user tapping a particular button in
your user interface. You might also
configure your text field delegate to
dismiss the keyboard when the user
presses the “return” key on the
keyboard itself. To dismiss the
keyboard, send the
resignFirstResponder message to the
text field that is currently the first
responder. Doing so causes the text
field object to end the current
editing session (with the delegate
object’s consent) and hide the
keyboard.
So, you have to send resignFirstResponder somehow. But there is a possibility that textfield loses focus another way during processing of textFieldShouldReturn: message. This also will cause keyboard to disappear.

Answer 4

One line code for Done button:-
[yourTextField setReturnKeyType:UIReturnKeyDone];
And add action method on valueChanged of TextField and add this line-
[yourTextField resignFirstResponder];

Answer 5

I used this method to change choosing Text Field
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
if ([textField isEqual:self.emailRegisterTextField]) {
[self.usernameRegisterTextField becomeFirstResponder];
} else if ([textField isEqual:self.usernameRegisterTextField]) {
[self.passwordRegisterTextField becomeFirstResponder];
} else {
[textField resignFirstResponder];
// To click button for registration when you clicking button "Done" on the keyboard
[self createMyAccount:self.registrationButton];
}
return YES;
}