问题是你可能只删除了几个视图吗？试试这个：

Is the issue that you're possibly only removing one view of several? Try this:

UIView *removeView;
while((removeView = [self.view viewWithTag:999]) != nil) {
    [removeView removeFromSuperview];
}

如果只有一个视图被创建/标记/删除，你也可以考虑只是添加一个属性来跟踪该视图，并写下：

If there's only one view that's getting created/tagged/removed, you also might consider just adding a property to track that view, and writing:

[self.subView removeFromSuperview];
self.subView = qty;