Animate using Autolayout the correct way

Animate.m

// source:
// http://stackoverflow.com/a/12664093/1328982
// credits to: Gervasio Marchand

- (void)moveBannerOffScreen {
    [self.view layoutIfNeeded];
    
    [self.childView mas_remakeConstraints:(MASConstraint* make){
        make.top.mas_equal(0);
        make.left.mas_equal(0);
        make.right.mas_equal(320);
        make.bottom.mas_equal(0);
    }];
    
    [UIView animateWithDuration:5
        animations:^{
            [self.view layoutIfNeeded]; // Called on parent view
        }];
    bannerIsVisible = FALSE;
}

- (void)moveBannerOnScreen { 
    [self.view layoutIfNeeded];

    [self.childView mas_remakeConstraints:(MASConstraint* make){
        make.top.mas_equal(0);
        make.left.mas_equal(0);
        make.right.mas_equal(0);
        make.bottom.mas_equal(0);
    }];
    
    [UIView animateWithDuration:5
        animations:^{
            [self.view layoutIfNeeded]; // Called on parent view
        }];
    bannerIsVisible = TRUE;
}