Objective-C：你如何声明和保留int？ [英] Objective-C: How do you declare and retain an int?

问题描述

这是我的代码：

@interface Game : Layer // this is from cocos2d
{
   int maxSprites;
}

@implementation Game
-(void)initVariables
{
  maxSprites = 18;
}

稍后，当我打印出来时，

Later on, when I print it out,

 NSLog(@" maxSprites = %d  ", maxSprites);

我得到：

 maxSprites = 2

要求它为18，崩溃或不要做的操作不行，好像现在只有2个。

And operations that require it to be 18, crash or don't work, as if it's really just 2 now.

这怎么可能？ =）

APPLE + SHIFT + F 显示没有其他用法的 maxSprites 变量。

APPLE + SHIFT + F reveals no other usage of the maxSprites variable.

我查看了其他代码示例，并且经常使用getter公开变量setter，他们也在使用 @property 。我错过了什么吗？我是Objective-C的新手，所以我不妨这样做！

I've looked at other code examples and often they're exposing the variable with a getter and setter, and they are also using @property. Am I missing something? I'm new to Objective-C, so I might as well just be!

编辑：
hrmph，为什么我得到-1？

hrmph, why'd I get a -1?

谢谢，我会尝试学习如何做一个观察点。

Thanks, I will try to learn how to do a Watchpoint.

在那之前，我想说我为maxSprites做了 APPLE + SHIFT + F 在Project，Textual，Contains，Ignore Case中只产生了：

Until then, I would like to say that I did a APPLE + SHIFT + F for maxSprites" In Project, Textual, Contains, Ignore Case and only resulted in:

Game.h:     int maxSprites;
Game.m:     maxSprites = 18;
Game.m:     NSLog(@" maxSprites  = %d", maxSprites);
Game.m:     NSLog(@" maxSprites  = %d", maxSprites);
Game.m:     NSLog(@"maxSprites is at %p", &maxSprites);
Game.m:     NSLog(@"maxSprites is at %p", &maxSprites);
Game.m:     NSLog(@" maxSprites  = %d", maxSprites);
Game.m:     NSLog(@" maxSprites  = %d", maxSprites);
Game.m:     NSLog(@"maxSprites is at %p", &maxSprites);
Game.m:     NSLog(@"maxSprites is at %p", &maxSprites);

2nd编辑：

我使用观察点找到了它所改变的位置。它在这里改变：

I found the location where it changes using a watchpoint. It changes here:

Expression: "*(int *) 67379960"
New Value: 2
Old  Value: 18

在这一行：

[self checkMatchBarAward:spriteTypeToAdd];

奇怪？该函数对 maxSprites 没有任何作用。

Odd? That function doesn't do anything with maxSprites.

编辑：
-我现在要提出一个新问题，找出价值自身发生变化的原因。谢谢你们的帮助，干得好。

-I'm going to make a new question now to find out why the value is changing on its own. Thank you for your help guys, great job.

这里将收到新帖子：
Objective-C：int值无变化

推荐答案

您不保留int，因为它不是对象。使用观察点并找出变量何时发生变化。

You don't retain an int because it's not an object. Use a watchpoint and find out when your variable is changing.

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