iphone - ViewController 响应选择器 :]: message sent to deallocated instance

Question

当我启用“僵尸对象”时，我收到此错误(“ViewController respondsToSelector:]: message sent to deallocated instance”)。我找到了错误所在，但不知道如何解决。

这是代码: ViewController.h

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController <UISearchDisplayDelegate, UISearchBarDelegate>{


    // The saved state of the search UI if a memory warning removed the view.
    NSString        *savedSearchTerm;
    NSInteger       savedScopeButtonIndex;
    BOOL            searchWasActive;
}

@property (nonatomic, copy) NSString *savedSearchTerm;
@property (nonatomic) NSInteger savedScopeButtonIndex;
@property (nonatomic) BOOL searchWasActive;

ViewController.m

...
// when I comment out "viewDidDisappear" everything is ok, how to solve this on different way?
- (void)viewDidDisappear:(BOOL)animated
{
    // save the state of the search UI so that it can be restored if the view is re-created
    self.searchWasActive = [self.searchDisplayController isActive];
    self.savedSearchTerm = [self.searchDisplayController.searchBar text];
    self.savedScopeButtonIndex = [self.searchDisplayController.searchBar selectedScopeButtonIndex];
}...

感谢您的帮助

Answer 1

您正在做什么来“创建”此错误？

就我而言，我将 ViewController 从导航堆栈中弹出，并且仍然有 NSNotifications 发送到该 VC。我只是忘记删除我的 VC 的所有观察者。