使用自定义方法潜在的内存泄漏，没有意义

I have this method:

我有这个方法：

-(NSString *)scrambleWordGenerator: (NSUInteger)length {
    NSMutableString *scrambledWord = [[NSMutableString alloc] initWithString:@""];
    for (int i = 0; i < length; i++) {
        NSUInteger randomIndex = arc4random() % [self.arrayOfCharacters count];
        NSString *randomCharacter = [NSString stringWithString:[self.arrayOfCharacters objectAtIndex:randomIndex]];
        [scrambledWord insertString:randomCharacter atIndex:i];
    }
    NSString *finalWord = [[NSString alloc] initWithString:scrambledWord];
    [scrambledWord release];
    return finalWord;
}

It works, swimmingly in fact, however upon using Xcode's "Analysis" feature, it says that finalWord has a potential memory leak.

事实上它可以游泳，但是在使用Xcode的“分析”功能时，它表示finalWord有潜在的内存泄漏。

I thought when creating a NSString with a prefab init method that the string will be autoreleased. What am I missing? Below is a screen grab of the error:

我想在使用预制init方法创建一个NSString时，该字符串将被自动释放。我错过了什么？下面是错误的屏幕抓取：

edit

编辑

The method now looks like this:

该方法现在看起来像这样：

-(NSString *)scrambleWordGenerator: (NSUInteger)length {
    NSMutableString *scrambledWord = [[NSMutableString alloc] initWithString:@""];
    for (int i = 0; i < length; i++) {
        NSUInteger randomIndex = arc4random() % [self.arrayOfCharacters count];
        NSString *randomCharacter = [NSString stringWithString:[self.arrayOfCharacters objectAtIndex:randomIndex]];
        [scrambledWord insertString:randomCharacter atIndex:i];
    }
    NSString *finalWord = [NSString stringWithString:scrambledWord];
    [scrambledWord release];
    return finalWord;
}

And no more errors!

没有更多的错误！

1 个解决方案

#1

No, the moment you use alloc, you're responsible for releasing it - either by release or by moving it to autorelease pool via autorelease.

不，在您使用alloc的那一刻，您负责释放它 - 通过发布或通过自动释放将其移动到自动释放池。

It would be on the autorelease pool if you used [NSString stringWithString:] instead.

如果您使用[NSString stringWithString：]，它将在自动释放池中。