Objective-C：在一个线程中分配并在另一个线程中释放

发布于 2024-10-12 07:02:35 字数 496 浏览 7 评论 0原文

我在我的主线程中执行此操作：

CCAnimation *anim; //class variable

[NSThread detachNewThreadSelector:@selector(loadAimation) toTarget:self withObject:nil];

在 loadAimation 中：

-(void) loadAnimation {
    NSAutoreleasePool *autoreleasepool = [[NSAutoreleasePool alloc] init];
        anim = [[CCAnimaton alloc] init];
        [autoreleasepool drain];
}

在主线程中我释放它：

        [anim release];

现在我想问这对于内存管理是否可以。

原文

I am doing this in my Main Thread:

CCAnimation *anim; //class variable

[NSThread detachNewThreadSelector:@selector(loadAimation) toTarget:self withObject:nil];

In loadAimation:

-(void) loadAnimation {
    NSAutoreleasePool *autoreleasepool = [[NSAutoreleasePool alloc] init];
        anim = [[CCAnimaton alloc] init];
        [autoreleasepool drain];
}

And in main thread I release it:

        [anim release];

Now I want to ask if this is fine regarding memory management.

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许一世地老天荒 2024-10-19 07:02:35

可以在一个线程中分配一个对象并在另一个线程中释放它。但是，根据您的处理方式，您的代码可能会错误地执行此操作。

如果可能的话，将 anim 转换为属性，这样您就不必太担心内存管理。如果不能，您可以应用访问器模式，但您必须自己实现。

static CCAnimation *anim=nil;

+(CCAnimation*)anim {
    @synchronized(self) {
        return [[anim retain] autorelease];
    }
}
+(void)setAnim:(CCAnimation*)animation {
    @synchronized(self) {
        if (anim != animation) {
            [anim release];
            anim = [animation retain];
        }
    }
}
-(void)loadAnimation {
    NSAutoreleasePool *autoreleasepool = [[NSAutoreleasePool alloc] init];
    [[self class] setAnim:[[[CCAnimaton alloc] init] autorelease]];
    [autoreleasepool drain];
}

It's possible to allocate an object in one thread and deallocate it in another. However, depending on how you approach it, your code could do it incorrectly.

If possible, turn anim into a property so you don't have to worry so much about memory management. If you can't, you can apply the accessor pattern, but you have to implement it yourself.

static CCAnimation *anim=nil;

+(CCAnimation*)anim {
    @synchronized(self) {
        return [[anim retain] autorelease];
    }
}
+(void)setAnim:(CCAnimation*)animation {
    @synchronized(self) {
        if (anim != animation) {
            [anim release];
            anim = [animation retain];
        }
    }
}
-(void)loadAnimation {
    NSAutoreleasePool *autoreleasepool = [[NSAutoreleasePool alloc] init];
    [[self class] setAnim:[[[CCAnimaton alloc] init] autorelease]];
    [autoreleasepool drain];
}

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