How to lift up the UIView when UITextField is editing ?

FirstWay.m

//Original Blog Post : http://technopote.com/lift-uiview-uitextfield-editing/

//Controller.h
@interface Controller : UIViewController <UITextFieldDelegate> {
    CGFloat animatedDistance;
} 

//Controller.m
#pragma constant UITextField
static const CGFloat KEYBOARD_ANIMATION_DURATION = 0.3;
static const CGFloat MINIMUM_SCROLL_FRACTION = 0.2;
static const CGFloat MAXIMUM_SCROLL_FRACTION = 0.6;
static const CGFloat PORTRAIT_KEYBOARD_HEIGHT = 216;
static const CGFloat LANDSCAPE_KEYBOARD_HEIGHT = 162;

#pragma mark UITextField delegate method
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
    [textField resignFirstResponder];
    return NO;
}
- (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;
    }
 
    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];
}
 
- (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];
}

secondWay.m

//Original Blog Post : https://gist.github.com/siannopollo/7892526

@implementation DelegateController {
  CGFloat keyboardAnimatedDistance;
}
 
static const CGFloat KEYBOARD_ANIMATION_DURATION = 0.3;
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 viewHeight, bottomOfTextField, topOfKeyboard;
  UIDeviceOrientation orientation = [UIDevice currentDevice].orientation;
  if (orientation == UIDeviceOrientationPortrait || orientation == UIDeviceOrientationPortraitUpsideDown) {
    viewHeight = viewRect.size.height;
    bottomOfTextField = textFieldRect.origin.y + textFieldRect.size.height;
    topOfKeyboard = viewHeight - PORTRAIT_KEYBOARD_HEIGHT - 10; // 10 point padding
  } else {
    viewHeight = viewRect.size.width;
    bottomOfTextField = textFieldRect.origin.x + textFieldRect.size.width;
    topOfKeyboard = viewHeight - LANDSCAPE_KEYBOARD_HEIGHT - 10; // 10 point padding
  }
  if (bottomOfTextField >= topOfKeyboard) keyboardAnimatedDistance = bottomOfTextField - topOfKeyboard;
  else keyboardAnimatedDistance = 0.0f;
  CGRect viewFrame = self.view.frame;
  viewFrame.origin.y -= keyboardAnimatedDistance;
  [UIView beginAnimations:nil context:NULL];
  [UIView setAnimationBeginsFromCurrentState:YES];
  [UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION];
  [self.view setFrame:viewFrame];
  [UIView commitAnimations];
}
 
- (void)textFieldDidEndEditing:(UITextField *)textField {
  CGRect viewFrame = self.view.frame;
  viewFrame.origin.y += keyboardAnimatedDistance;
  [UIView beginAnimations:nil context:NULL];
  [UIView setAnimationBeginsFromCurrentState:YES];
  [UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION];
  [self.view setFrame:viewFrame];
  [UIView commitAnimations];
}
 
@end