setObject:ForKey: 崩溃？

发布于 2024-12-01 12:42:09 字数 2041 浏览 1 评论 0原文

我在控制台中遇到此崩溃：

2011-08-27 23:26:45.041 App[1672:3117] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFDictionary setObject:forKey:]: attempt to insert nil key'
*** First throw call stack:
(0x3231c8c3 0x362ee1e5 0x3231c7bd 0x3231c7df 0x32289679 0x3052e865 0x3220fd55 0x3221b7a3 0x3345e4b7 0x3345e38c)
terminate called throwing an exception[Switching to process 10243 thread 0x2803]
[Switching to process 10243 thread 0x2803]

我认为在崩溃时与此崩溃相关的唯一会触发的行是此行：

UIImage *photo = [self.selectedDictionary objectForKey:@"ProfileImage"];

这里看起来有什么问题吗？可能是什么问题？

编辑1：当我这样做来调用方法时，它崩溃了：代码：

if(actionSheet.tag == 1) {
            [self showAchievements];
        }

这是showAchievements方法：代码：

- (void)showAchievements {
    GKAchievementViewController *achievements = [[GKAchievementViewController alloc] init];
    if (achievements != nil)
    {
        achievements.achievementDelegate = self;
        [self presentModalViewController:achievements animated:YES];
    }
}

- (void)achievementViewControllerDidFinish:(GKAchievementViewController *)viewController
{
    [self dismissModalViewControllerAnimated:YES];
    [viewController release];
}

这次崩溃可能是因为我没有正确连接 iTC 中的所有内容吗？我确信它会在该方法中崩溃，但我不知道为什么。

有人有什么想法吗？

Edit2：我正在认真对待它，在我的控制台中，就在它崩溃之前，它有一行说“错过了方法”。所以我搜索这个 NSLog 在哪里，它在 GameCenterManager.m 中，我认为这是 Game Center 必需的文件。方法如下：

    - (void) callDelegate: (SEL) selector withArg: (id) arg error: (NSError*) err
{
    assert([NSThread isMainThread]);
    if([delegate respondsToSelector: selector])
    {
        if(arg != NULL)
        {
            [delegate performSelector: selector withObject: arg withObject: err];
        }
        else
        {
            [delegate performSelector: selector withObject: err];
        }
    }
    else
    {
        NSLog(@"Missed Method");
    }
}

那么从该代码中您看出什么问题了吗？

谢谢！

原文

I am getting this crash in the console:

2011-08-27 23:26:45.041 App[1672:3117] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFDictionary setObject:forKey:]: attempt to insert nil key'
*** First throw call stack:
(0x3231c8c3 0x362ee1e5 0x3231c7bd 0x3231c7df 0x32289679 0x3052e865 0x3220fd55 0x3221b7a3 0x3345e4b7 0x3345e38c)
terminate called throwing an exception[Switching to process 10243 thread 0x2803]
[Switching to process 10243 thread 0x2803]

The only line that I think would fire at the time it crashes that relates to this crash is this line:

UIImage *photo = [self.selectedDictionary objectForKey:@"ProfileImage"];

Does anything look wrong here? What could be the problem?

Edit1:
It is crashing when I do this to call a method:
Code:

if(actionSheet.tag == 1) {
            [self showAchievements];
        }

This is the showAchievements method:
Code:

- (void)showAchievements {
    GKAchievementViewController *achievements = [[GKAchievementViewController alloc] init];
    if (achievements != nil)
    {
        achievements.achievementDelegate = self;
        [self presentModalViewController:achievements animated:YES];
    }
}

- (void)achievementViewControllerDidFinish:(GKAchievementViewController *)viewController
{
    [self dismissModalViewControllerAnimated:YES];
    [viewController release];
}

Can this crash be because I have not properly hooked everything up in iTC? I am definitely sure it crashes in that method and I do not know why.

Does anyone have any ideas?

Edit2: I am getting down to it here, in my console, right before it crashes it has a line saying Missed Method. So I search for where this NSLog is and it is in GameCenterManager.m, a file necessary for Game Center I think. Here is the method:

    - (void) callDelegate: (SEL) selector withArg: (id) arg error: (NSError*) err
{
    assert([NSThread isMainThread]);
    if([delegate respondsToSelector: selector])
    {
        if(arg != NULL)
        {
            [delegate performSelector: selector withObject: arg withObject: err];
        }
        else
        {
            [delegate performSelector: selector withObject: err];
        }
    }
    else
    {
        NSLog(@"Missed Method");
    }
}

So from that code do you see whats wrong?

Thanks!

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知你几分 2024-12-08 12:42:09

我猜答案就在您发布的代码中：

reason: '-[__NSCFDictionary setObject:forKey:]: attempt to insert nil key'

您不能将 nil 键插入字典中。你是否在做类似 [myDictionary setObject:foo forKey:bar] 的事情，其中“bar”为零？

顺便说一句，您也不能将 nil 值插入字典中，但这似乎并不是错误原因所指示的。您可以调用[myDictionary setValue:nil forKey:bar]（只要bar不为零） - 这会从字典中删除键。如果您想指示“nil”值，您可以将 NSNull 对象插入字典中。但是键——键必须始终非零。

I'd guess the answer is right there in the code you posted:

reason: '-[__NSCFDictionary setObject:forKey:]: attempt to insert nil key'

You can't insert a nil key into a dictionary. Are you doing something like [myDictionary setObject:foo forKey:bar] where 'bar' is nil?

Incidentally, you also can't insert nil values into a dictionary, but that doesn't appear to be what the error reason indicates. You can call [myDictionary setValue:nil forKey:bar] (as long as bar isn't nil) - this removes the key from the dictionary. And if you want to indicate a "nil" value, you can insert the NSNull object into a dictionary. But keys -- keys must always be non-nil.

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