Question

我正在使用静态分析器检查我的代码的内存泄漏，我发现以下部分有潜在的泄漏。

NSString *path = nil;
NSString *tutorialPath = nil;
if (CC_CONTENT_SCALE_FACTOR() == 2)
{
    path = [[NSBundle mainBundle] pathForResource:@"sheetObjects-hd" ofType:@"plist"];
    tutorialPath = [[NSBundle mainBundle] pathForResource:@"sheetTutorial-hd" ofType:@"plist"];
} else
{
    path = [[NSBundle mainBundle] pathForResource:@"sheetObjects" ofType:@"plist"];
    tutorialPath = [[NSBundle mainBundle] pathForResource:@"sheetTutorial" ofType:@"plist"];
}

_animDataDictionary = [[[NSDictionary alloc] initWithContentsOfFile:path] objectForKey:@"frames"];
_tutorialAnimDataDictionary = [[[NSDictionary alloc] initWithContentsOfFile:tutorialPath] objectForKey:@"frames"];

问题在于这两行：

_animDataDictionary = [[[NSDictionary alloc] initWithContentsOfFile:path] objectForKey:@"frames"];
_tutorialAnimDataDictionary = [[[NSDictionary alloc] initWithContentsOfFile:tutorialPath] objectForKey:@"frames"];

我已经检查了我的dealloc代码，我很确定它们已被正确释放。

这就是我定义实例的方式：

NSDictionary *_animDataDictionary;
NSDictionary *_tutorialAnimDataDictionary;

dealloc功能：

[_animDataDictionary release];
_animDataDictionary = nil;
[_tutorialAnimDataDictionary release];
_tutorialAnimDataDictionary = nil;
[super dealloc];

通过查看其他相关问题，我看到人们抱怨类似的错误，但没有人真正得到答案，并知道它为什么会发生。

我有大量与此代码相关的泄漏，我认为必须将其删除。

谢谢！

Answer 1

正如静态分析器指出的那样，我认为你正在泄漏你的NSDictionary对象。您没有将[[NSDictionary alloc] initWithContentsOfFile:path]或[[NSDictionary alloc] initWithContentsOfFile:tutorialPath]的结果存储在任何位置，因此您无法向这些对象发送显式发布消息。

尝试在创建中间词典后添加自动释放调用，例如：

_animDataDictionary = [[[[NSDictionary alloc] initWithContentsOfFile:path] autorelease] objectForKey:@"frames"];
_tutorialAnimDataDictionary = [[[[NSDictionary alloc] initWithContentsOfFile:tutorialPath] autorelease] objectForKey:@"frames"];

Answer 2

首先：您确定调用了dealloc方法吗？在其中添加NSLog以确保您的类已取消分配。如果没有，问题不在该类的代码中，而是在使用（分配/创建）它的类的代码中。

第二，你分配字典的方法只调用一次？或者你可以多次拨打这些电话：

_animDataDictionary = [[[NSDictionary alloc] initWithContentsOfFile:path] objectForKey:@"frames"];
_tutorialAnimDataDictionary = [[[NSDictionary alloc] initWithContentsOfFile:tutorialPath] objectForKey:@"frames"];

在最后一种情况下，您需要在创建新词典之前释放2个词典：

[_animDataDictionary release]; // the first time it's = nil, and calling this line has no problem anyway
_animDataDictionary = [[[NSDictionary alloc] initWithContentsOfFile:path] objectForKey:@"frames"];
[_tutorialAnimDataDictionary release];
_tutorialAnimDataDictionary = [[[NSDictionary alloc] initWithContentsOfFile:tutorialPath] objectForKey:@"frames"];

NSDictionary initWithContentsOfFile内存泄漏问题

2 个答案: