iOS仿AirPods弹出动画

HCAirPodsAnimationViewController *vc = [[HCAirPodsAnimationViewController alloc] init];
  vc.delegate = self;
  vc.modalPresentationStyle = UIModalPresentationOverCurrentContext;
  
  [UIView animateWithDuration:0.2 animations:^{
    self.maskBgView.alpha = 0.5;
  } completion:nil];
  
  [self presentViewController:vc animated:YES completion:^{
    [vc.animationView play];
  }];

- (UIView *)maskBgView
{
  if (!_maskBgView) {
    _maskBgView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height)];
    _maskBgView.backgroundColor = [UIColor blackColor];
    _maskBgView.alpha = 0;
    [self.view addSubview:_maskBgView];
  }
  return _maskBgView;
}

- (void)initContentView
{
  CGFloat containerW = SCREEN_WIDTH - 20;
  CGFloat containerH = containerW * 0.9;
  UIView *containerView = [[UIView alloc] initWithFrame:CGRectMake(10, SCREEN_HEIGHT - containerH - 10, containerW, containerH)];
  containerView.layer.cornerRadius = 20;
  containerView.backgroundColor = [UIColor whiteColor];
  [self.view addSubview:containerView];
  
  self.animationView = [[LOTAnimationView alloc] initWithFrame:CGRectMake(70, 70, containerW - 140, containerH - 140)];
  [containerView addSubview:self.animationView];
  self.animationView.animation = @"gift_animation";
  
  self.animationView.loopAnimation = YES;
  
  UIButton *confirmButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 200, 34)];
  confirmButton.center = CGPointMake(self.animationView.center.x, containerH - 44);
  
  [confirmButton setTitle:@"Close" forState:UIControlStateNormal];
  [confirmButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
  
  [confirmButton setBackgroundColor:[UIColor blueColor]];
  confirmButton.layer.cornerRadius = 10;
  
  [confirmButton addTarget:self action:@selector(onConfirmButtonClick) forControlEvents:UIControlEventTouchUpInside];
  [containerView addSubview:confirmButton];
}

- (void)onConfirmButtonClick
{
  if ([self.delegate respondsToSelector:@selector(onAirPodsAnimationViewControllerConfirmButtonClick:)]) {
    [self dismissViewControllerAnimated:YES completion:nil];
    [self.delegate onAirPodsAnimationViewControllerConfirmButtonClick:self];
  }
}

- (void)onAirPodsAnimationViewControllerConfirmButtonClick:(HCAirPodsAnimationViewController *)vc
{
  [UIView animateWithDuration:0.2 animations:^{
    self.maskBgView.alpha = 0.0;
  } completion:nil];
}