XCode 分析器：对象的潜在泄漏
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XCode Analyzer : Potential leak of an object
提问by Max
here is a piece of code, could you help me managing memory correctly in it please ?
这是一段代码，你能帮我正确管理内存吗？
- (void) buildSpritesWithName:(NSString*)sN {
self.arrayPages = [[NSMutableArray alloc] initWithCapacity:self.numPages];
NSString *spriteName0 = [NSString stringWithFormat:@"%@%i.png", sN, 0];
CCSprite *temp0 = [CCSprite spriteWithSpriteFrameName:spriteName0];
NSLog(@"temp sprite %@ size : %f / %f",spriteName0, temp0.contentSize.width, temp0.contentSize.height);
self.imgSize = CGSizeMake(temp0.contentSize.width, temp0.contentSize.height);
for (int c = 1; c <= numberOfWheelFacesCycles; c++) {
for (int x = 1; x <= self.numPages; x++) {
NSString *spriteName = [NSString stringWithFormat:@"%@%i.png",sN, x];
CCSprite *temp = [CCSprite spriteWithSpriteFrameName:spriteName];
[self.arrayPages addObject:temp];
}
}
NSLog(@"%i Pages built",self.arrayPages.count);
}
Analyzer says "Potential leak of an object" at line :
分析器在第 1 行显示“对象的潜在泄漏”：
NSString *spriteName0 = [NSString stringWithFormat:@"%@%i.png", sN, 0];
Why that ? NSString is autorelease right ? so which object could be leaked ?
为什么 ？NSString 是自动释放的吧？那么哪个对象可能会泄漏？
I have the following in another class, again, what's the problem :
我在另一堂课上有以下内容，又是什么问题：
self.name = [playersNames objectAtIndex:type];
By the way, if the management of the loop is not good, could you advice as well ?
顺便说一句，如果循环的管理不好，您也可以提出建议吗？
Thanks for your help
谢谢你的帮助
回答by Extra Savtheitroad-Faire
Look at your property or accessor for arrayPages. If it retains, then your potential leak arises when you call:
查看您的属性或访问器以获取arrayPages. 如果它保留，那么当您调用时可能会出现泄漏：
self.arrayPages = [[NSMutableArray alloc] initWithCapacity:self.numPages];
If arrayPagesretains, then do this instead:
如果arrayPages保留，则改为执行此操作：
self.arrayPages = [[[NSMutableArray alloc] initWithCapacity:self.numPages] autorelease];
or more simply:
或更简单地说：
self.arrayPages = [NSMutableArray arrayWithCapacity:self.numPages];
As for your loop, it looks all right, but beware of creating a lot of autoreleased objects inside it; they aren't released until some point later.
至于你的循环，它看起来不错，但要注意在它里面创建了很多自动释放的对象；它们直到某个时间点之后才会被释放。
