什么是“自动释放，没有池在适当位置”是什么意思？ [英] What does “Autoreleased with no pool in place” mean?

问题描述

我的应用程序结构如下，
核心部分用C ++编写，使用线程，我正在开发UI的Objective C，
如果我不执行线程它工作正常，但我不能禁用，停止线程，UI是崩溃在日志中随机可以看到，以下消息

  __ NSAutoreleaseNoPool（）：NSCFString类的对象0x350270自动释放，没有池 - 正好泄露
  

消息来多一次，
通过googling来知道，我需要设置NSAutoReleasePool摆脱它，但如何可能与C ++代码集成。

编辑： Core lib将从UI激活，因此我想，它可以说UI正在主线程中运行，Lib是创建/终止线程而不通知UI，在这种情况下
可以在UI中调用AutoReleasePool

任何人都可以指导我？

解决方案

查看这些文档，了解使用Cocoa的多线程应该知道的内容： http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/Multithreading/ThreadSafetySummary/ThreadSafetySummary.html p>

您可以像设计应用程式那样设计应用程式，但请注意以下两点：

1. 当UI控件（如视图（AppKit或UIKit））在主线程上操作时，生命是最简单的（有时是必需的）。您可以在后台线程中使用Foundation对象和一些AppKit / UIKit对象，并且可以在多个线程中使用一些Foundation对象。


2. 如果您在后台线程中使用任何Cocoa对象，您需要在这些线程上设置自动释放池。

如此：

  - （void）backgroundThreadStart 
 {
 NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; 
 
 // do stuff 
 
 [pool release]; 
} 
  

这将修复您的控制台错误，但您可能有其他问题导致你看到的实际崩溃。

My Application structure is as follows, the core part is written in C++ and using thread heavily, and i am developing UI in Objective C on top of it, if i don't execute the thread it works fine, but i can't disable, stop thread, UI is crashing randomly in the log i could see , following message

__NSAutoreleaseNoPool(): Object 0x350270 of class NSCFString autoreleased with no pool in place - just leaking

Similar messages coming more then once, by googling come to know, i need to set NSAutoReleasePool to get rid of it, but how its possible to integrate the same with C++ code.

Edit: Core lib will be activated from UI , hence i suppose, its safe to say UI is running in the main thread, Lib is creating/terminating thread without notifying UI, in this case, can i call AutoReleasePool in the UI

Can anyone guide me?

解决方案

See these docs for what you should know about multithreading with Cocoa: http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/Multithreading/ThreadSafetySummary/ThreadSafetySummary.html

It's OK to design your app like you have, but two things should be kept in mind:

1. Life is simplest (and sometimes necessary) when UI controls like views (AppKit or UIKit) are manipulated on the main thread. You can use Foundation objects and some AppKit/UIKit objects on background threads, and some Foundation objects can be used from multiple threads.
2. If you're using any Cocoa objects at all in background threads, you'll need to set up autorelease pools on those threads.

Like so:

- (void)backgroundThreadStart 
{
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

    // do stuff

    [pool release];
}

That will fix your console errors, but you might have other issues that led to the actual crashing you were seeing.

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