EXC_BAD_ACCESS（代码= 2，地址= 0x3）

Question

嗨，我从这个代码收到以下错误：

EXC_BAD_ACCESS (code=2, address=0x3) 

当我按下播放键我基本上是环回CFRetain。

我无法弄清楚这有什么问题。

Xcode是在这一行特别指出：

[NSDictionary dictionaryWithObjectsAndKeys:[self getCorrectName:oldController], @"ViewController", sec, @"duration", nil]; 

我查了字典的两个值，他们似乎退房。

- (NSString *)getCorrectName:(UIViewController *)viewController { 
    if (viewController.class == [UINavigationController class]) { 
     UIViewController *vc = [viewController.childViewControllers objectAtIndex:0]; 
     return NSStringFromClass(vc.class); 
    } else { 
     return NSStringFromClass(viewController.class); 
    } 
} 

# pragma mark - UITabBarControllerDelegate 

- (BOOL)tabBarController:(UITabBarController *)tbController shouldSelectViewController:(UIViewController *)viewController { 
    // Tracking which controller will be clicked 
    [[Mixpanel sharedInstance] track:@"tab_clicked" 
          properties:[NSDictionary dictionaryWithObjectsAndKeys: 
             [self getCorrectName:viewController], @"ViewController", nil]]; 

    // Tracking how long was spent on the last controller 
    UIViewController *oldController = [self.childViewControllers objectAtIndex:self.selectedIndex]; 
    if (viewController != oldController) { 
     NSTimeInterval secondsBetween = [self.start timeIntervalSinceNow]; 
     NSInteger sec = -1 * (secondsBetween + 0.5);   // round up and down 
     if (sec > 0) { 
      NSLog(@"Changing controllers from %@, %d seconds", [self getCorrectName:oldController], sec); 
      [NSDictionary dictionaryWithObjectsAndKeys:[self getCorrectName:oldController], @"ViewController", sec, @"duration", nil]; 
      /* 
      [[Mixpanel sharedInstance] track:@"tab_viewed" 
            properties:[NSDictionary dictionaryWithObjectsAndKeys: 
               [self getCorrectName:oldController], @"ViewController", sec, @"duration", 
               nil]]; 
      */ 
      self.start = [NSDate date]; 
     } 
    } 
    return YES; 
} 

任何想法？

Answer 1

NSInteger不是一个类。

使用NSNumber