非常奇怪的 Objective C 错误

发布于 2024-11-09 18:13:34 字数 613 浏览 0 评论 0原文

我想说我非常了解 Objective C。但我刚刚发现了一个非常奇怪的错误。我有一个“int模式”；类中的成员变量。只写“模式”；在 init 方法中改变类的行为（稍后不会被释放）即使编译器给我警告“语句无效”，

这是怎么回事？我可以不确定对象何时被释放吗？

这是我的代码，更详细一些：

@interface HelpScene : CCScene {
    int mode;
}

以及在实现中

- (id) init {
    if (self=[super init]) {
        [[SomeObject alloc] initWithBlock:^(id sender) {
            mode;  // CHANGES BEHAVIOUR
            [Call CCDirector.replaceScene which usually ends up deallocing self
            (the current scene). But not with the previous line anymore]
        }
    }
    return self;
}

原文

I'd say I know Objective C pretty well. But I've just tracked down a bug to something very strange.
I have an "int mode;" member variable in a class. And just writing "mode;" in the init method changes the behavior of the class (it doesn't get dealloced later on)
Even though the compiler gives me the warning "Statement has no effect"

What is going on ?
Can I not be sure of when an object is dealloced ?

Here's my code in a bit more detail:

@interface HelpScene : CCScene {
    int mode;
}

and in the implementation

- (id) init {
    if (self=[super init]) {
        [[SomeObject alloc] initWithBlock:^(id sender) {
            mode;  // CHANGES BEHAVIOUR
            [Call CCDirector.replaceScene which usually ends up deallocing self
            (the current scene). But not with the previous line anymore]
        }
    }
    return self;
}

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