Question

I am using a class inherited from UINavigationController present as a modal view, in the navigation bar I have a button Done which will dismiss the modal view when user tap on it. Everything behave normal except the dealloc() in ImagePickerController, GroupPickerController (which is initialized as root view) not get called when I dismiss the modal view. This cause the leak of the memory.

Here is the code use it:

ImagePickerController *picker = [[ImagePickerController alloc] initWithRootViewController:nil];

// don t show animation since this may cause the screen flash with white background. 
[self presentModalViewController:picker animated:NO];

picker.navigationBar.barStyle = UIBarStyleBlack;
[picker release];

这里是图象PickerController, 它是UINavigation 主计长:

 - (id)initWithRootViewController:(UIViewController *)root {

    GroupPickerController *controller = [[GroupPickerController alloc] initWithNibName:nil bundle:nil];
    self = [super initWithRootViewController:controller];
    [controller release];
    if (self) {
        self.modalPresentationStyle = UIModalPresentationPageSheet;
    }
    return self;
}

- (void)dealloc {
    [super dealloc];
}

-(void) dismiss
{
    [self.navigationController setViewControllers:nil];
    [self dismissModalViewControllerAnimated:YES];
}

这里是班轮冷却机的代码,是对航道的ton子的反应,以否定运输方式的观点:

...
#pragma mark - button actions
- (void)done {
    [self.parent dismiss];
}

I tried to manually remove the views from NavigationController, seemed not no effect at all... [self.navigationController setViewControllers:nil];

得到帮助!

<>执行>:

Please disregard this question, apparently it s a mistake. :(

最后,这个问题已经解决......不会改变任何法典,而是重建项目。

Answer 1

First of all, you should not be subclassing UINavigationController:

这一类别并非用于分类。

这一行文是什么?

controller.parent = self;

如果控制者保留父母亲财产,你就会有一个保留周期,引起你所描述的问题。认为UINavigationController中的所有观点控制员都能够利用天候机控制器的财产进入导航控制员。

Answer 2

There s is a difference between a UIViewController begin dismissed and released. When you dismiss it, it can be released at any moment, but not necessarily immediately.

Are you sure you have a memory leak ? Maybe the picker is released a few seconds after the dimiss.

如果你真的有记忆泄露,那就意味着还有另一个地方可以保留。

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