iPhone UISearchBar 动画到顶部
有很多应用程序的搜索栏在活动时向上移动，在不活动时向下移动。苹果提供了一个可与 IB 配合使用的示例代码，但我如何以编程方式实现此行为？大多数情况下，它与导航栏相结合，导航栏移出屏幕以代替搜索栏
There are lots of apps where the searchbar moves upwards if active and moves down when it is inactive. There is a sample code from apple available which works with IB, but how can I achieve this behavior programmatically? Mostly it is combined with a navigationbar which moves out of the screen in replace with the searchbar
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就我个人而言，我最终在搜索开始时使用
[self.navigationController setNavigationBarHidden:YESAnimated:YES];，然后只需执行[self.navigationController setNavigationBarHidden:NOanimated:YES];code> 搜索完成后。Personally, I ended up using
[self.navigationController setNavigationBarHidden:YES animated:YES];when the search begins and then just do[self.navigationController setNavigationBarHidden:NO animated:YES];once the search is done.当搜索栏成为第一响应者时，它会自行动画。你可以调用[searchBar成为FirstResponder]；或类似的东西，检查文档。
When the search bar becomes first responder it will animate itself. You can call [searchBar becomeFirstResponder]; or something like that, checkpoint the docs.