Obj-C：在循环中正确释放分配的对象

发布于 2024-11-30 06:32:22 字数 788 浏览 1 评论 0原文

希望我能很好地解释这一点。假设如下：

@interface ClassA : NSObject {
   NSMutableArray firstArray;
   NSArray secondArray;
}

#import "ClassA"
@interface ClassB : NSObject {
   ClassA classAobject;
}

然后在程序“伪代码”的其他部分访问字典键，例如：

NSMutableArray* sample = [[NSMutableArray alloc] init];
for (keys in Data)
{
    ClassA* aObj = [[ClassA alloc] initWith: objectForKey:@"KeyHere" andWith:@"Key2Here"];

    ClassB* bObj = [[ClassB alloc] init];
    [bObj setClassAObj: aObj];

    [sample addObject: bObj];
}
Singleton* single = [Singleton single];
[single setArray: sample];

我的问题是在循环内部创建的 ClassA 和 ClassB 对象以及在循环外部存储它们的数组。我是否因不释放它们而泄漏内存？如果我确实释放它们，我怎样才能以一种不会丢失存储“样本”数组的单例中对它们的引用的方式来释放它们？

如果重要的话，存储它的 Singleton 数组会在类的“init”方法中分配和初始化。

原文

Hopefully I can explain this well.
Assume the following:

@interface ClassA : NSObject {
   NSMutableArray firstArray;
   NSArray secondArray;
}

#import "ClassA"
@interface ClassB : NSObject {
   ClassA classAobject;
}

Then in some other part of the program 'Psuedo-code' accessing dictionary keys like:

NSMutableArray* sample = [[NSMutableArray alloc] init];
for (keys in Data)
{
    ClassA* aObj = [[ClassA alloc] initWith: objectForKey:@"KeyHere" andWith:@"Key2Here"];

    ClassB* bObj = [[ClassB alloc] init];
    [bObj setClassAObj: aObj];

    [sample addObject: bObj];
}
Singleton* single = [Singleton single];
[single setArray: sample];

My question is with the ClassA and ClassB objects created inside the loop and the array to store them outside of the loop. Am I leaking memory here, by not releasing them? If I do release them, how can I do so in a way that I wont lose the reference to them in the singleton to which I am storing the 'sample' array?

If it matters, the Singleton array to which it is being stored is allocated and initialized in the "init" method of the class.

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宛菡 2024-12-07 06:32:22

将对象添加到数组中会保留对象。因此，您需要在添加它们后释放它们（如果不是自动释放）。同样，您需要确保实例变量数组（在单例中）的@properties设置为retain，以便在单例中设置时保留示例数组。然后您还需要发布示例。

此外，您的实例变量需要是指针：

@interface ClassA : NSObject {
   NSMutableArray *firstArray;
   NSArray *secondArray;
}

#import "ClassA"
@interface ClassB : NSObject {
   ClassA *classAobject;
}

Adding objects to an array retains the objects. So you need to release them after you add them (if not autoreleased). Similarly, you need to make sure that the @properties for the instance variable array (in Singleton) is set to retain so that the sample array is retained when set in the singleton. Then you need to release sample as well.

Also, your instance variables need to be pointers:

@interface ClassA : NSObject {
   NSMutableArray *firstArray;
   NSArray *secondArray;
}

#import "ClassA"
@interface ClassB : NSObject {
   ClassA *classAobject;
}

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