Question

我的脑型模型界定了一种NSMutableArray财产。

@property (retain, nonatomic) NSMutableArray *stockColors;

在脑膜炎期间, mu阵填充了物体。

在我看来,控制者认为DidLoad功能是我确实这样做的。

*Brain brain = [[Brain alloc]init];
NSLog(@"Brain stockColors is %@", brain.stockColors);

这运转良好,并按预期显示记忆。

Then in the same view controller I have an "addButtonPressed" action declared linked to a UIButton in the .xib.

在我的补充行动中,如果我尝试并做同样的记录的话。

NSLog(@"Brain stockColors is %@", brain.stockColors);

该方案坠毁!

If I do

NSLog(@"Brain stockColors is %@", brain);

I get an address for the brain... so the brain exists.. but for some reason it seems that brain.stockColors is getting released or something by the time I get to the addButtonPressed action.

谁能解释为什么会使其自动释放?

增编

Answer 1

Considering you left out the important code... the actual Brain init call I am going to say that when you create your mutable array you are assigning to the instance variable and not the property.

//The Brain init method should contain something similar to this
self.stockColor = [NSMutableArray array];

//stockColor = [NSMutableArray array]; would be incorrect and get autoreleased

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