AutoLayout, Constraints and Animation

Question

Let\'s assume that I have this UIView:

with these relativ

Answer 1

For animation you need to change constant of the left and top constraint instead of adding new constraint. As follows:

 self.mBtnTopConstraint.constant = yourval1;
    self.mBtmLeftConstraint.constant = yourval2;
    [yourbtn setNeedsUpdateConstraints];

    [UIView animateWithDuration:0.5 animations:^{

            [yourbtn layoutIfNeeded];

        } completion:^(BOOL isFinished){
        }];

Hope this helps.