A UIView subclass that fades away more the harder you press on it, and eventually disappears if you press hard enough. iOS 9 only, of course.

VanishingView.m

@implementation VanishingView

- (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    UITouch *t = touches.allObjects.firstObject;
    self.alpha = 1 - t.force/t.maximumPossibleForce;
    
    if (t.force == t.maximumPossibleForce) {
        [self removeFromSuperview];
    }
}

- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    [UIView animateWithDuration:.1 animations:^{
        self.alpha = 1;
    }];
}

@end