背景阴影动画，转场动画

[UIView transitionWithView:self.popOutView duration:0.2 options:UIViewAnimationOptionTransitionCrossDissolve animations:^{
            self.popOutView.hidden = NO ;
            self.popOutView.backgroundColor = [UIColor colorWithRed:0.0 green:0.0 blue:0.0 alpha:0.7];
        } completion:^(BOOL finished) {
            [self addlistView];
        }];