NSApplication Windows属性-Windows无法删除? [英] NSApplication windows property - windows not removed?

问题描述

我有一个显示模式的NSWindow/Controller.它具有一个类似于这样的动作的关闭"按钮:

I have a NSWindow/Controller that I display modal. It has a "Close" button hooked up to an action like this:

- (IBAction)close:(id)sender
{
    [self.window orderOut:sender];
    [self.window close];

    [[NSApplication sharedApplication] stopModal];
}

在主窗口中，显示模式:

From my main window, I display the modal:

- (IBAction)modal:(id)sender
{
    NSLog(@"Before: %lu", [[[NSApplication sharedApplication] windows] count]);

    ModalWindowController *modal = [[ModalWindowController alloc] initWithWindowNibName:@"ModalWindowController"];
    [[NSApplication sharedApplication] runModalForWindow:modal.window];

    NSLog(@"After: %lu", [[[NSApplication sharedApplication] windows] count]);
}

我打开和关闭模态几次，输出如下:

I open and close the modal a few times, and the output is like this:

2013-01-17 14:36:08.071 Modals[3666:303] Before: 1
2013-01-17 14:36:08.962 Modals[3666:303] After: 2
2013-01-17 14:36:09.578 Modals[3666:303] Before: 2
2013-01-17 14:36:11.009 Modals[3666:303] After: 3
2013-01-17 14:36:12.108 Modals[3666:303] Before: 3
2013-01-17 14:36:12.910 Modals[3666:303] After: 4

因此， [[[[NSApplication sharedApplication] windows]计数] 仅增加.

我希望当我打开和关闭模式窗口时，它会增加和减少.我的应用程序使用ARC.有人可以向我解释吗?

I would expect it to increase and decrease as I open and close the modal window. My application uses ARC. Can someone explain this to me?

提前谢谢

推荐答案

您正在关闭窗口，但这并没有取消分配它，因为您的窗口控制器ModalWindowController仍保留着它.您的样本中没有任何显示窗口控制器被释放的信息.

You're closing your window, but that's not deallocating it because your window controller ModalWindowController is still retaining it. I don't see anything in your sample to indicate the window controller is being released.

最简单的答案是在调用-runModalForWindow:之后释放窗口控制器.

The simplest answer to give you is to have you release your window controller following your call to -runModalForWindow:.

您可能期望的是，当窗口关闭时，窗口控制器将关闭.那是您必须自己实现的事情.在Apple文档的关闭窗口行为"中:

What you may be expecting is the window controller to close when your window does. That's something you have to make happen yourself. From "Window Closing Behavior," in Apple's documentation:

如果要关闭窗口以使窗口和窗口同时显示 控制器不在文档的一部分时消失，您的子类 NSWindowController可以观察NSWindowWillCloseNotification或 窗口委托，实现windowWillClose:方法并包括 您的实现中的以下代码行:"[self autorelease];"

If you want the closing of a window to make both window and window controller go away when it isn’t part of a document, your subclass of NSWindowController can observe NSWindowWillCloseNotification or, as the window delegate, implement the windowWillClose: method and include the following line of code in your implementation: "[self autorelease];"

在您的情况下，这可能不是最好的方法，因为您将有机会调用-stopModal之前，先丢弃窗口控制器和窗口.

In your scenario, this might not be the best approach, because you'd wind up disposing of both your window controller and window before you get a chance to call -stopModal.

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