Ios 无法在searchController的搜索栏上停止动画并隐藏取消按钮

我在导航栏中设置了搜索栏。激活后，它将设置动画并显示“取消”按钮。我正在尝试停止动画并阻止“取消”按钮出现。我的故事板是在navigationController中设置的tableviewController

self.searchController = [[UISearchController alloc]initWithSearchResultsController:nil];
self.searchController.searchResultsUpdater = self;
self.searchController.dimsBackgroundDuringPresentation = NO;
self.searchController.hidesNavigationBarDuringPresentation = NO;

self.searchController.searchBar.frame = CGRectMake(self.searchController.searchBar.frame.origin.x, self.searchController.searchBar.frame.origin.y, self.searchController.searchBar.frame.size.width, 44.0);

self.navigationItem.titleView = self.searchController.searchBar;
[self.searchController.searchBar setShowsCancelButton:NO animated:NO];

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请尝试

[self.searchController.searchBar showCancelButton:NO]

不走运，我得到的是“UISearchBar”没有可见的@interface声明选择器“showCancelButton”。我的错误。它是一个属性，所以应该是

[self.searchController.searchBar setshowcancelbutton:NO]

或

self.searchController.searchBar.showsCancelButton=NO；

。