问题
I am having a zombie while using a UISearchDisplayController with a UITableView.
The UISearchDisplayController (and the rest of the view) is set via interface builder (storyboard on xcode 5 and using ARC and iOS 7 only).
The searchDisplayController is used by these 2 methods
-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString {
[self filterContentForSearchText:searchString scope:
[[self.searchDisplayController.searchBar scopeButtonTitles] objectAtIndex:[self.searchDisplayController.searchBar selectedScopeButtonIndex]]];
return YES;
}
-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchScope:(NSInteger)searchOption {
[self filterContentForSearchText:self.searchDisplayController.searchBar.text scope:
[[self.searchDisplayController.searchBar scopeButtonTitles] objectAtIndex:searchOption]];
return YES;
}
Instruments is giving me this information
# Event Type ∆ RefCt RefCt Timestamp Responsible Library Responsible Caller
0 Malloc +1 1 00:10.739.188 UIKit -[UITableView setTableHeaderBackgroundColor:]
1 Retain +1 2 00:10.739.214 UIKit -[UIView(Internal) _addSubview:positioned:relativeTo:]
2 Retain +1 3 00:10.739.234 UIKit -[UISearchDisplayController _configureSearchBarForTableView]
3 Retain +1 4 00:10.739.291 UIKit -[UIView(Hierarchy) subviews]
4 Retain +1 5 00:10.771.238 UIKit -[UIView(Hierarchy) subviews]
5 Retain +1 6 00:10.782.890 QuartzCore -[CALayer layoutSublayers]
6 Release -1 5 00:10.782.891 QuartzCore -[CALayer layoutSublayers]
7 Release -1 4 00:10.792.538 QuartzCore CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*)
8 Release -1 3 00:15.446.447 UIKit -[UITableView dealloc]
9 Release -1 2 00:15.446.661 UIKit -[UIView(Internal) _invalidateSubviewCache]
10 Release -1 1 00:15.446.679 UIKit -[UIView(Hierarchy) removeFromSuperview]
11 Release -1 0 00:15.446.744 UIKit -[UITableView setTableHeaderBackgroundColor:]
12 Zombie -1 00:15.446.765 UIKit -[UISearchDisplayController _cleanUpSearchBar]
I tried to clean up the UISearchDisplayController in the dealloc method like this
-(void)dealloc {
self.searchDisplayController.searchResultsTableView.delegate = nil;
self.searchDisplayController.delegate = nil;
self.searchDisplayController.searchBar.delegate = nil;
self.searchDisplayController.searchResultsDelegate = nil;
self.searchDisplayController.searchResultsDataSource = nil;
}
but it didn't work.
Have you any idea of what I am doing wrong ?
Thanks for the help.
回答1:
I think I've been able to work around this problem. Here's another question talks about workarounds:
UISearchDisplayController causes crash after viewDidUnload
So I added:
@property (nonatomic, weak) IBOutlet UISearchBar *searchBar;
@property (nonatomic) UISearchDisplayController *searchController;
And then in viewDidLoad:
UISearchDisplayController *searchController = [[UISearchDisplayController alloc] initWithSearchBar:[self searchBar] contentsController:self];
[searchController setDelegate:self];
[searchController setSearchResultsDelegate:self];
[searchController setSearchResultsDataSource:self];
[self setSearchController:searchController];
And in dealloc:
[self setSearchController:nil];
That seems to have solved it.
回答2:
Possibly a known issue relative to searchDisplayController not being retained. Try this to increment the retain count:
in .h:
@property (nonatomic, strong) UISearchDisplayController *searchController;
in viewDidLoad:
self.searchController = (__bridge UISearchDisplayController *)(CFBridgingRetain(self.searchDisplayController));
in dealloc (not sure if needed):
self.searchController = CFBridgingRelease((__bridge void*)(self.searchController));
回答3:
- (void) viewDidDisappear:(BOOL)animated {
[super viewDidDisappear:animated];
self.tableView = nil;
}
来源:https://stackoverflow.com/questions/19214286/having-a-zombie-issue-on-uisearchdisplaycontroller