You can use this method to animate a view, when changing 'yValue'. And you can change animation curve, when changing ' [UIView setAnimationCurve:UIViewAnimationCurve..................];'
- (void)animationView:(int)yValue
{
[UIView beginAnimations:@"View Flip" context:nil];
[UIView setAnimationDuration:0.50];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
CGRect frame = veriableNameOfView.frame;
frame.origin = CGPointMake(0, yValue);
veriableNameOfView.frame = frame;
[UIView commitAnimations];
}