UISearchController searchBar文本重叠内容

Question

我需要一些帮助解决这个问题：

这是我目前的代码：

_searchController = [[UISearchController alloc] initWithSearchResultsController:nil];
_searchController.delegate = self;
_searchController.searchResultsUpdater = self;
_searchController.dimsBackgroundDuringPresentation = NO;
_searchController.searchBar.showsCancelButton = NO;
_searchController.searchBar.delegate = self;
_searchController.searchBar.searchTextPositionAdjustment = UIOffsetMake(20.0, 0.0);
self.definesPresentationContext = YES;

你们有没有遇到过同样的事情？