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NSArray *subviews = view.subviews;
for (UIView *aView in subviews) {
  if view.isMember(of:UITabBarItem.self) {

  }
}

    NSArray *subviews = view.subviews;
    for (UIView *aView in subviews) {
        if ([aView isKindOfClass:self]) {
            [huds addObject:aView];
        }
    }