How to show keyboard upper side of UItextfield when we enter text, in iphone?

Question

I have a UITextfield in which I am entering value. I don't want to scroll myself or adjust keyboard myself , I want Keyboard automatically adjust itself when I enter text in UITextfield and always show below the textfield.

Any hints from experts would be very welcome.

Answer 1

Here is some code that I have used. Basically, what we're going to do is animate the position of the view whenever a UITextField gets focus. To do this, we must make our UIViewController a delegate of our UITextFields

define a variable float animatedDistance in .h of the file

 @interface <ClassName>

    float animatedDistance;

 @end

 static const CGFloat KEYBOARD_ANIMATION_DURATION = 0.3;
 static const CGFloat MINIMUM_SCROLL_FRACTION = 0.2;
 static const CGFloat MAXIMUM_SCROLL_FRACTION = 0.8;
 static const CGFloat PORTRAIT_KEYBOARD_HEIGHT = 216;
 static const CGFloat LANDSCAPE_KEYBOARD_HEIGHT = 162;

 - (void)textFieldDidBeginEditing:(UITextField *)textField
 {
     CGRect textFieldRect = [self.view.window convertRect:textField.bounds fromView:textField];
     CGRect viewRect = [self.view.window convertRect:self.view.bounds fromView:self.view];

     CGFloat midline = textFieldRect.origin.y + 0.5 * textFieldRect.size.height;
     CGFloat numerator = midline - viewRect.origin.y - MINIMUM_SCROLL_FRACTION * viewRect.size.height;
     CGFloat denominator = (MAXIMUM_SCROLL_FRACTION - MINIMUM_SCROLL_FRACTION) * viewRect.size.height;
     CGFloat heightFraction = numerator / denominator;

     if (heightFraction < 0.0)
     {
         heightFraction = 0.0;
     }
     else if (heightFraction > 1.0)
     {
         heightFraction = 1.0;
     }

     UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
     if (orientation == UIInterfaceOrientationPortrait || orientation == UIInterfaceOrientationPortraitUpsideDown)
     {
         animatedDistance = floor(PORTRAIT_KEYBOARD_HEIGHT * heightFraction);
     }
     else
     {
         animatedDistance = floor(LANDSCAPE_KEYBOARD_HEIGHT * heightFraction);
     }

     CGRect viewFrame = self.view.frame;
     viewFrame.origin.y -= animatedDistance;

     [UIView beginAnimations:nil context:NULL];
     [UIView setAnimationBeginsFromCurrentState:YES];
     [UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION];

     [self.view setFrame:viewFrame];

     [UIView commitAnimations];
     }
 }

Now that the view has been 'pushed up' when a UITextField is selected, we want to make sure that we slide it back down when we're done:

 - (void) textFieldDidEndEditing:(UITextField *)textField
 {
     CGRect viewFrame = self.view.frame;
     viewFrame.origin.y += animatedDistance;

     [UIView beginAnimations:nil context:NULL];
     [UIView setAnimationBeginsFromCurrentState:YES];
     [UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION];

     [self.view setFrame:viewFrame];

     [UIView commitAnimations];
 }

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