Cocos2d EXC_BAD_ACCESS

Question

我是cocos2d的新手，突然得到了这个EXC_BAD_ACCESS， 我做了一个新的获胜菜单，但出现了错误 我认为错误是因为我调用了一个已释放的对象，但我没有释放任何东西？ 我的调试控制台没有错误，奇怪的

是我的 Level_1.m

//
//  Level_1.m
//  iPadGame
//
//  Created by My Name on 1/25/12.
//  Copyright 2012 __MyCompanyName__. All rights reserved.
//

#import "Level_1.h"
#import "HelloWorldLayer.h"

CCSprite *player;
CCSprite *enemy;
CCSprite *enemy2;
CCSprite *enemy3;
CCSprite *star;
CCSprite *star2;
CCSprite *star3;
CCSprite *bg;
CCSprite *toolBar;

CCLabelTTF *youWin;

bool movePlayer;


@implementation Level_1

@synthesize score;

+(CCScene *) scene {
    // 'scene' is an autorelease object.
    CCScene *scene = [CCScene node];

    // 'layer' is an autorelease object.
    Level_1 *layer = [Level_1 node];

    // add layer as a child to scene
    [scene addChild: layer];

    // return the scene
    return scene;
}

-(void) setUpWinMenu {
    [CCMenuItemFont setFontName:@"Marker Felt"];
    [CCMenuItemFont setFontSize:75];
    CCMenuItem *MainMenu = [CCMenuItemFont itemFromString:@"Main Menu" target:self selector:@selector(gotoMainMenu)];
    CCMenu *WinMenu = [CCMenu menuWithItems:MainMenu, nil];
    [self addChild:WinMenu];
    MainMenu.position = ccp(400,500);

}
// on "init" you need to initialize your instance
-(id) init
{
    // always call "super" init
    // Apple recommends to re-assign "self" with the "super" return value
    if( (self=[super init])) 
    {
        self.isTouchEnabled = YES;

        scoreNumber = 10;

        bg = [CCSprite spriteWithFile:@"metal_background.jpeg"];
        bg.position = ccp(512,384);
        [self addChild:bg];

        toolBar = [CCSprite spriteWithFile:@"ToolBar.png"];
        toolBar.position = ccp(512,-30);
        [self addChild:toolBar];

        score = [CCLabelAtlas labelWithString:@"0123456789" charMapFile:@"ScoreFinal.png" itemWidth:50 itemHeight:75 startCharMap:'.'];
        [self addChild:score];
        score.position = ccp (-100,15);

        CCLabelTTF *scoreLabel = [CCLabelTTF labelWithString:@"Score:" fontName:@"Marker Felt" fontSize:45];
        scoreLabel.position = ccp(score.position.x + 275,score.position.y + 40);
        scoreLabel.color = ccc3(0, 0, 0);
        [self addChild:scoreLabel];



        star = [CCSprite spriteWithFile:@"Star.png"];
        star.position = ccp(400,600);
        [self addChild:star];

        star2 = [CCSprite spriteWithFile:@"Star.png"];
        star2.position = ccp(600,600);

        star3 = [CCSprite spriteWithFile:@"Star.png"];
        star3.position = ccp(200,600);

        player = [CCSprite spriteWithFile:@"ball.png"];
        player.position = ccp(500,300);
        [self addChild:player];

        enemy = [CCSprite spriteWithFile:@"SpaceShip.png"];
        enemy.position = ccp(150,600);
        [self addChild:enemy];

        enemy2 = [CCSprite spriteWithFile:@"SpaceShip.png"];
        enemy2.position = ccp(250,600);
        [self addChild:enemy2];

        enemy3 = [CCSprite spriteWithFile:@"SpaceShip.png"];
        enemy3.position = ccp(350,600);
        [self addChild:enemy3];

        [self schedule:@selector(enemyMove) interval:0.01];
        [self schedule:@selector(collisionDetection) interval:0.01];
        [self schedule:@selector(getStar) interval:0.01];

        NSString *string = [NSString stringWithFormat:@"Score: %i", (int)scoreNumber];
        [score setString:string];

        x = 15;
        x2 = 15;
        x3 = 15;
        y = 15;

        Bx = 10;
        By = 10;

        movePlayer = FALSE;
        CCRepeatForever *repeat = [CCRepeatForever actionWithAction: [CCRotateBy actionWithDuration:2 angle:360]];
        [star runAction:repeat];

        star.visible = 1;

    }
    return self;
}


-(void)ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch* myTouch = [touches anyObject];
    CGPoint location = [myTouch locationInView: [myTouch view]];
    location = [[CCDirector sharedDirector]convertToGL:location];


    CGRect playerRect = CGRectMake(player.position.x - (player.contentSize.width/2),
                                   player.position.y - (player.contentSize.height/2),
                                   player.contentSize.width,
                                   player.contentSize.height);

    CGRect Tlocation = CGRectMake(location.x, location.y, 10, 10);



    NSLog(@"Touch Began");
    if (CGRectIntersectsRect (Tlocation, playerRect)) {
        player.position = location;
        movePlayer = TRUE;
    }



}

-(void)ccTouchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *myTouch = [touches anyObject];
    CGPoint point = [myTouch locationInView:[myTouch view]];
    point = [[CCDirector sharedDirector] convertToGL:point];

    if (movePlayer == TRUE) {
        player.position = point;

        if (player.position.y < 110) {
            player.position = ccp(player.position.x, 111);
        }
    }

}

-(void)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    NSLog(@"Touch ended");

    movePlayer = FALSE;

}

-(void) enemyMove {
    enemy.position = ccp(enemy.position.x + x, enemy.position.y);
    enemy2.position = ccp(enemy2.position.x - x2, enemy2.position.y);
    enemy3.position = ccp(enemy3.position.x + x3, enemy3.position.y);

    if (enemy.position.x > 1024 || enemy.position.x < 0) {
        x = -x;
    }
    if (enemy2.position.x > 1024 || enemy2.position.x < 0) {
        x2 = -x2;
    }
    if (enemy3.position.x > 1024 || enemy3.position.x < 0) {
        x3 = -x3;
    }
    if (enemy.position.y > 768 || enemy.position.y < 120) {
        y = -y;
    }

}

-(void) collisionDetection {
    if (CGRectIntersectsRect(player.boundingBox, enemy.boundingBox)) {
        [self schedule:@selector(collisionAlert)];
    }
    if (CGRectIntersectsRect(player.boundingBox, enemy2.boundingBox)) {
        [self schedule:@selector(collisionAlert)];
    }
    if (CGRectIntersectsRect(player.boundingBox, enemy3.boundingBox)) {
        [self schedule:@selector(collisionAlert)];
    }
}

-(void) getStar {
    if (CGRectIntersectsRect(player.boundingBox, star.boundingBox)) {

        NSLog(@"Got Star!");

        scoreNumber += 100;
        NSString *string = [NSString stringWithFormat:@"Score: %i", (int)scoreNumber];
        [score setString:string];

        [self addChild:star2];

        if (star.visible == 1) {

        }
    }
    if (CGRectIntersectsRect(player.boundingBox, star2.boundingBox)) {

        NSLog(@"Got Star!");

        scoreNumber += 100;
        NSString *string = [NSString stringWithFormat:@"Score: %i", (int)scoreNumber];
        [score setString:string];

        [self addChild:star3];
    }
    if (CGRectIntersectsRect(player.boundingBox, star3.boundingBox)) {
        youWin = [CCLabelTTF labelWithString:@"You Win" fontName:@"Marker Felt" fontSize:75];
        youWin.position = ccp(500,400);
        [self addChild:youWin];
        [self setUpWinMenu];
        NSLog(@"Got Star!");


        scoreNumber += 100;
        NSString *string = [NSString stringWithFormat:@"Score: %i", (int)scoreNumber];
        [score setString:string];

        player.position = ccp(player.position.x - 10, player.position.y - 20);
        [self unschedule:@selector(enemyMove)];
        [self unschedule:@selector(collisionAlert)];
        [self unschedule:@selector(getStar)];

    }


    return;
}
-(void) collisionAlert {
    player.position = ccp(player.position.x - 10, player.position.y - 20);
    [self unschedule:@selector(enemyMove)];
    UIAlertView* dialog = [[UIAlertView alloc] init];
    [dialog setDelegate:self];
    [dialog setTitle:@"Fail"];
    [dialog setMessage:@"You are a Failure!"];
    [dialog addButtonWithTitle:@"Goto Main Menu"];
    [dialog addButtonWithTitle:@"Retry!"];
    [dialog addButtonWithTitle:@"Dont push this button"];
    [dialog show];
    [dialog release];
    [self unschedule:@selector(collisionAlert)];
}
-(void) alertView:(UIAlertView *)alert clickedButtonAtIndex:(NSInteger)buttonIndex {
    if(buttonIndex == 0) {
        [[CCDirector sharedDirector] replaceScene:[CCTransitionFlipAngular transitionWithDuration:1 scene:[HelloWorldLayer node]]];
    }
    if (buttonIndex == 1) {
        [[CCDirector sharedDirector] replaceScene:[Level_1 node]];
    }
    if (buttonIndex == 2) {

        [self schedule:@selector(noting)];
    }
}

-(void) gotoMainMenu {
    [[CCDirector sharedDirector] replaceScene:[CCTransitionJumpZoom transitionWithDuration:1 scene:[HelloWorldLayer node]]];
}

@end

我没有完全完成，但可能有一些空方法，但我确信这不是导致问题的原因

Answer 1

所有这些对象：

CCSprite *player;
CCSprite *enemy;
CCSprite *enemy2;
CCSprite *enemy3;
CCSprite *star;
CCSprite *star2;
CCSprite *star3;
CCSprite *bg;
CCSprite *toolBar;

都通过自动释放方法进行分配，例如CCSprite spriteWithFile:，然后，当您使用其他方法访问这些对象时，就像在 ccTouchesBegan: withEvent: 中所做的那样它们已经被释放，并且您得到 EXC_BAD_ACCESS

您可以做的一件事是修复它，就是调用 spriteWithFile: 方法，然后调用保留调用，例如

toolBar = [[CCSprite spriteWithFile:@"ToolBar.png"] retain];

But不要忘记释放 Level_1 类 dealloc 上保留的对象（我没有看到在你的类中实现）

-(void) dealloc {

   [toolBar release];
   [super dealloc]
}

Answer 2

即使您在控制台上看不到任何内容，如果您在调试器下运行应用程序，您应该能够在崩溃时检查调用堆栈。

这将清楚地告诉您是否正在访问某些已释放的对象，或者可能正在尝试发送消息。