Navigation bar disappears when typing in UISearchController text field
I'm trying to figure out why my whole navigation bar disappears when I start typing in the UISearchController.searchBar It loads properly and animates properly, but I lose the active NavBar when I start typing. Here's the code to load the searchController from viewDidLoad:
UITableViewController *searchResultsController = [[UITableViewController alloc] initWithStyle:UITableViewStylePlain];
searchResultsController.tableView.dataSource = self;
searchResultsController.tableView.delegate = self;
searchResultsController.tableView.backgroundColor = [UIColor redColor];
self.searchController = [[UISearchController alloc] initWithSearchResultsController:searchResultsController];
self.searchController.delegate = self;
self.searchController.searchResultsUpdater = self;
self.searchController.dimsBackgroundDuringPresentation = YES;
self.searchController.hidesNavigationBarDuringPresentation = NO;
[self.searchController.searchBar sizeToFit];
self.tableView.tableHeaderView = self.searchController.searchBar;
self.definesPresentationContext = NO;
And here's the result after I start typing:
Notice how the table view is there, but it appears to occupy the space of the nav controller and extend downwards into the first section heading. Any ideas?
Thanks.
You need to set definesPresentationContext to YES. From apples example:
// Search is now just presenting a view controller. As such, normal view controller
// presentation semantics apply. Namely that presentation will walk up the view controller
// hierarchy until it finds the root view controller or one that defines a presentation context.
self.definesPresentationContext = YES
这项工作对我来说
self.navigationController.navigationBar.translucent = true;
So, I was eventually able to solve this problem with this following init sequence. However, I'm not too sure what I did to make this happen. Kind of busy right now, so I'll just paste this solution and will accept a solution if somebody can pinpoint.
- (void)loadSearchBar
{
NSLog(@"Loading SearchBar");
UITableViewController *searchResultsController = [[UITableViewController alloc] initWithStyle:UITableViewStylePlain];
UITableView *myTv = [[UITableView alloc] initWithFrame:[[UIScreen mainScreen] bounds] style:UITableViewStylePlain];
searchResultsController.tableView = myTv;
searchResultsController.tableView.dataSource = self;
searchResultsController.tableView.delegate = self;
searchResultsController.tableView.keyboardDismissMode = UIScrollViewKeyboardDismissModeOnDrag;
searchResultsController.tableView.sectionIndexColor = [UIColor colorWithHexString:linkBlue];
self.searchResultsController = searchResultsController;
self.searchController = [[UISearchController alloc] initWithSearchResultsController:searchResultsController];
self.searchController.delegate = self;
self.searchController.searchResultsUpdater = self;
self.searchController.dimsBackgroundDuringPresentation = YES;
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.searchBar = self.searchController.searchBar;
self.searchBar.autocorrectionType = UITextAutocorrectionTypeNo;
self.searchBar.autocapitalizationType = UITextAutocapitalizationTypeNone;
self.searchBar.delegate = self;
self.searchBar.translucent = YES;
self.tableView.tableHeaderView.layer.zPosition++;
self.tableView.tableHeaderView = self.searchController.searchBar;
self.definesPresentationContext = YES;
//add color to search field
UIView *subviews = [self.searchBar.subviews lastObject];
UITextField *textView = (id)[subviews.subviews objectAtIndex:1];
textView.backgroundColor = [UIColor colorWithHexString:textFieldBlue];
}
上一篇: 嵌入符号的泛化？