我遇到了一个问题，当一个View是tableview的tableHeaderview时，我把View重新嵌套一层重新设置给tableHeaderview，这个View不展示
代码如下：
UIView *view = [UIView new];
tableView.tableHeaderview = view;
UiView *otherView = [UIview new];
otherView addSubview:view];
tableView.tableHeaderview = otherView;
这个时候view不展示了。
根据调用栈看，设置tableHeaderview后，view执行了一次removeFromSuperview，从otherView中消失了。
所以想了解一下，当设置新的tableHeaderview，对旧的HeaderView是怎么处理的？
noprkl
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