How to make view automatically scroll when keyboard show up

Question

Hi all
I'm like a totally noob for objective-c coding, let alone the iPhone programing. :P
Anyway, I somehow manage to create a simple application that receive input via UITextField, do some simple math, then display the result in other UITextFields (which can act as a input vice versa).
Problem is, when I use the UITextField at the buttom of the screen as an input, the keyboard will block that text field out of my view, so I could not see what I'm typing at all.
That's the question. How to make my view scrollable, and make it simply scroll itself out of the way when the keyboard is shown? I already inherit my view from UIScrollView, but don't know what to do next. Can you guys help enlighten me, please?
Thanx

Answer 1

Of course, if you're dealing with textFields, you should change a few things try something like that in your .m file :
- (void)textFieldDidBeginEditing:(UITextField *)theTextField
if ([theTextField isEqual:yourTextField])
// Restore the position of the main view if it was animated to make room for the keyboard.
if (self.view.frame.origin.y >= 0)
[self setViewMovedUp:YES];
// Animate the entire view up or down, to prevent the keyboard from covering the author field.
- (void)setViewMovedUp:(BOOL)movedUp
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3];
// Make changes to the view's frame inside the animation block. They will be animated instead
// of taking place immediately.
CGRect rect = self.view.frame;
if (movedUp)
// If moving up, not only decrease the origin but increase the height so the view
// covers the entire screen behind the keyboard.
rect.origin.y -= kOFFSETFORKEYBOARD;
rect.size.height += kOFFSETFORKEYBOARD;
else
// If moving down, not only increase the origin but decrease the height.
rect.origin.y += kOFFSETFORKEYBOARD;
rect.size.height -= kOFFSETFORKEYBOARD;
self.view.frame = rect;
[UIView commitAnimations];
- (void)keyboardWillShow:(NSNotification *)notif
// The keyboard will be shown. If the user is editing the author, adjust the display so that the
// author field will not be covered by the keyboard.
if ([yourTextField isFirstResponder] && self.view.frame.origin.y >= 0)
[self setViewMovedUp:YES];
else if (![yourTextField isFirstResponder] && self.view.frame.origin.y < 0)
[self setViewMovedUp:NO];
#pragma mark - UIViewController delegate methods
- (void)viewWillAppear:(BOOL)animated
// watch the keyboard so we can adjust the user interface if necessary.
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:)
name:UIKeyboardWillShowNotification object:self.view.window];
- (void)viewWillDisappear:(BOOL)animated
[self setEditing:NO animated:YES];
// unregister for keyboard notifications while not visible.
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
be sure to invoke the method when you dismiss the keyboard, so that the view "falls back" to its normal state:
if (self.view.frame.origin.y < 0)
[self setViewMovedUp:NO];
Of course, declare the method
(void)setViewMovedUp:(BOOL)movedUp;
in the .h file
and the #define you will use in you .m file :
// the amount of vertical shift upwards keep the text field in view as the keyboard appears
#define kOFFSETFORKEYBOARD 50.0
// the duration of the animation for the view shift
#define kVerticalOffsetAnimationDuration 0.30
good luck !