Objective-C 类别中的重大泄漏

发布于 2024-10-02 15:18:06 字数 1103 浏览 0 评论 0原文

我创建了一个自定义 NSString 类别,它可以让我找到两个其他字符串之间的所有字符串。我现在遇到的问题是发现我的脚本中有很多 kB 泄漏。请参阅下面的代码:

    #import "MyStringBetween.h"

@implementation NSString (MyStringBetween)

-(NSArray *)mystringBetween:(NSString *)aString and:(NSString *)bString;
{
    NSAutoreleasePool *autoreleasepool = [[NSAutoreleasePool alloc] init];

    NSArray *firstlist = [self componentsSeparatedByString:bString];
    NSMutableArray *finalArray = [[NSMutableArray alloc] init];


    for (int y = 0; y < firstlist.count - 1 ; y++) {
        NSString *firstObject = [firstlist objectAtIndex:y];
        NSMutableArray *secondlist = [firstObject componentsSeparatedByString:aString];
        if(secondlist.count > 1){

            [finalArray addObject:[secondlist objectAtIndex:secondlist.count - 1]];
        }
    }

    [autoreleasepool release];

    return finalArray;
}
@end

我承认我不太擅长释放对象,但我相信 NSAutoreleasePool 会为我处理事情。

泄漏的行:

NSMutableArray *secondlist = [firstObject componentsSeparatedByString:aString];

手动释放 secondarylist 会引发异常。

提前致谢!

I created a custom NSString Category which lets me find all strings between two other strings. I'm now running into the problem of finding that there are a lot of kBs leaking from my script. Please see code below:

    #import "MyStringBetween.h"

@implementation NSString (MyStringBetween)

-(NSArray *)mystringBetween:(NSString *)aString and:(NSString *)bString;
{
    NSAutoreleasePool *autoreleasepool = [[NSAutoreleasePool alloc] init];

    NSArray *firstlist = [self componentsSeparatedByString:bString];
    NSMutableArray *finalArray = [[NSMutableArray alloc] init];


    for (int y = 0; y < firstlist.count - 1 ; y++) {
        NSString *firstObject = [firstlist objectAtIndex:y];
        NSMutableArray *secondlist = [firstObject componentsSeparatedByString:aString];
        if(secondlist.count > 1){

            [finalArray addObject:[secondlist objectAtIndex:secondlist.count - 1]];
        }
    }

    [autoreleasepool release];

    return finalArray;
}
@end

I admit that I'm not super good at releasing objects, but I had believed that the NSAutoreleasePool handled things for me.

The line that is leaking:

NSMutableArray *secondlist = [firstObject componentsSeparatedByString:aString];

Manually releasing secondlist raises an exception.

Thanks in advance!

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评论(2

野稚 2024-10-09 15:18:06

不,这是泄漏的行:

NSMutableArray *secondlist = [[NSMutableArray alloc] init];

而且泄漏并没有那么大(只是一个空的可变数组)。不过,还是不要这样做。

特别是,该行:

    secondlist = [[firstlist objectAtIndex:y] componentsSeparatedByString:aString];

正在分配对空可变数组的引用。

另外,FinalArray 应命名为finalArray

No, this is the line that is leaking:

NSMutableArray *secondlist = [[NSMutableArray alloc] init];

And it isn't that big of a leak (just an empty mutable array). Still, don't do that.

In particular, the line:

    secondlist = [[firstlist objectAtIndex:y] componentsSeparatedByString:aString];

Is assigning over the reference to the empty mutable array.

Also FinalArray should be named finalArray.

一世旳自豪 2024-10-09 15:18:06

FinalArray 泄漏。您应该在返回它之前自动释放它,但请确保在分配自动释放池之前或释放它之后执行此操作。

finalArray is leaking. You should autorelease it before returning it but make sure you do it either before allocating the autorelease pool or after releasing it.

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