使用UISearchBar时，开始进行搜索，搜索框向上弹开始搜索，搜索框下方的阴影区域及键盘弹出，产品要求对阴影视图定制修改透明度为0.15，针对这个需求进行的开发。
核心代码：
// _searchBar为实例化的UISearchBar对象
UISearchDisplayController * _searchBarController = [[UISearchDisplayController alloc] initWithSearchBar:_searchBar contentsController:self];
[_searchBarController setSearchResultsDataSource:self];
[_searchBarController setSearchResultsDelegate:self];
[_searchBarController setDelegate:self];
//实现代理方法----切记一定是在DidBeginSearch
- (void)searchDisplayControllerDidBeginSearch:(UISearchDisplayController *)controller
{
UIView *superV = controller.searchResultsTableView.superview;
UIView *superSuperV = superV.superview;
for (UIView *view in superSuperV.subviews) {
for (UIView *getView in view.subviews) {
if ([getView isKindOfClass:[NSClassFromString(@"_UISearchDisplayControllerDimmingView") class]])
{
getView.alpha = 0.15;
}
}
}
}
亲测可用~~~
