Question

我有一个生成Deck对象的方法（带有NSMutableArray属性的NSObject子类），它用Card对象填充数组（UIView子类带有一些整数和一个NSString属性）。当我要求甲板时，我会检查是否已存在（我认为），如果存在，请在获得新的之前将其释放。

我的viewcontroller中的代码......

#import "FlashTestViewController.h"

@implementation FlashTestViewController

- (IBAction)generateDeck {

    if (aDeck != nil) {
        [aDeck release];
    }

    aDeck = [[Deck alloc] initDeckWithOperator:@"+"];
}


- (IBAction)generateCard {

    if (aCard != nil) {
        [aCard fadeAway];
    }

    aCard = [aDeck newCardFromDeck];
    [self.view addSubview:aCard];
}

- (void)fadeAway {
    [aCard removeFromSuperview];
    [aCard release];
    }

    @end

甲板课程如下......

#import <Foundation/Foundation.h>
#import "Card.h"

@class Deck;

@interface Deck : NSObject {

    NSMutableArray* cards;
}

@property(nonatomic, retain) NSMutableArray* cards;

- (id)initDeckWithOperator: (NSString*)mathOper;
- (id)newCardFromDeck;

@end

- (id)initDeckWithOperator: (NSString*)mathOper {

    if (cards != nil) {
        [cards release];
    }
    cards = [[NSMutableArray alloc] init];
    for (int i=0; i<11; i++) {
        for (int j=0; j<11; j++) {
            int xPos = (random() % 220) + 10;
            int yPos = (random() % 360) + 10;
            Card* aCard = [[Card alloc] initWithFrame:CGRectMake(xPos, yPos, 60, 80)];
            aCard.upperOperand = i;
            aCard.lowerOperand = j;
            aCard.theOperator = mathOper;
            aCard.theResult = i + j;

            UITextView* upperTextView = [[UITextView alloc] initWithFrame:CGRectMake(5, 5, 50, 20)];
        NSString* upperOper = [[NSString alloc] initWithFormat:@"     %d", i];
        upperTextView.text = upperOper;
        [aCard addSubview:upperTextView];
        [upperTextView release];
        [upperOper release];

        UITextView* middleTextView = [[UITextView alloc] initWithFrame:CGRectMake(5, 30, 50, 20)];
        NSString* middleOper = [[NSString alloc] initWithFormat:@"%@  %d", mathOper, j];
        middleTextView.text = middleOper;
        [aCard addSubview:middleTextView];
        [middleTextView release];
        [middleOper release];

        UITextView* lowerTextView = [[UITextView alloc] initWithFrame:CGRectMake(5, 55, 50, 20)];
        NSString* lowerOper = [[NSString alloc] initWithFormat:@"     %d", j+i];
            lowerTextView.text = lowerOper;
            [aCard addSubview:lowerTextView];
            [lowerTextView release];
            [lowerOper release];

            [cards addObject: aCard];
            [aCard release];
        }
    }
    return self;
}

- (id)newCardFromDeck {
    int index = random() % [cards count];
    Card* selectedCard = [[cards objectAtIndex:index] retain];
    [cards removeObjectAtIndex:index];
    return selectedCard;
}

@end

当我从newCardFromDeck方法中请求一张新卡时，我做了同样的事情。有什么建议吗？

谢谢！

Answer 1

看看这行代码：

cards = [[NSMutableArray alloc] init];

您是否在cards方法中发布了dealloc？看起来这可能可能是内存泄漏。

Answer 2

将此代码添加到Deck.m文件中：

- (void)dealloc
{
    [cards release];
    [super dealloc];
}

Answer 3

如果你没有在视图的dealloc中释放它，那么generateDeck中的aDeck也是一个泄漏。

Answer 4

在newCardFromDeck中：

Card* selectedCard = [[cards objectAtIndex:index] retain];

看起来你保留了卡并将其归还给某个地方。这个回报值最终会在哪里？如果它在另一个带有'retain'属性的变量中结束，它可以第二次保留（在赋值给变量时）。

乐器说我有内存泄漏，但我没有看到它

4 个答案: