我需要明确分配我的NSNumber吗？ [英] Do I need to explicitly alloc my NSNumber?

问题描述

我正在定义一个数字，如下所示：

I am defining a number, as follows:

NSNumber *nn0 = [NSNumber numberWithInt:0];

没有任何分配，它可以正常工作。我的理解是，如果我使用numberWithInt，则会自动调用alloc和init。

It works fine without any alloc. My understanding is that if I use numberWithInt, alloc and init are called automatically.

如果我尝试在函数结束时释放，我会遇到问题：

If I try to release at the end of my function, I run into problems:

[nn0 release];

我收到运行时错误。

我的问题是：如果我使用numberWithInt初始化NSNumber，我是否必须对其进行任何内存管理？

My question is: if I use numberWithInt to initialise the NSNumber, do I have to do any memory management on it?

推荐答案

许多类型的便利构造函数产生一个自动自动释放的对象 - 即新对象将由当前的NSAutoreleasePool保留。您不需要手动释放这些对象 - 它们将在当前NSAutoreleasePool释放/耗尽时释放。

The "convenience constructors" for a lot of types produce an object that is automatically "autoreleased" - i.e. the new object will be retained by the current NSAutoreleasePool. You don't need to manually release these objects - they will be released when the current NSAutoreleasePool is released/drained.

有关便捷构造函数的说明，请参阅此页面，以及如何管理这些内存。

See this page for a description of convenience constructors, and how to mange the memory for these.

http://www.macdevcenter.com/pub/a/mac/2001/07/27/cocoa.html?page=3

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