exc_bad_access при продвижении моделирования на устройстве

Question

Эта ошибка возникает только на самом устройстве. При работе на симуляторе в Xcode 6 он не падает.

Я создаю космическое пространство и получаю случайные звезды стрельбы по небу. В сцене вызывается [goToSpace], который устанавливает звездное поле, используя три SKEmitterNodes для имитации глубины. Затем инициализируется таймер, который отправляет стрельбу по звездам.

При инициализации звездного поля необходимо продвинуть моделирование трех объектов SKEmitterNodes, чтобы получить полное небо звезд. Когда вызывается строка [emitterNode1 advanceSimulationTime: lifetime], я получаю exc_bad_access. Я следил за учебниками, чтобы NSZombie не помог.

Я не могу на всю жизнь отслеживать, почему я получаю exc_bad_access. Я использую Parse.com-х Краш отчетности, которая дает этот стек:

> Stack Trace Thread 0 (crashed) 0 libsystem_platform.dylib 
> OSSpinLockLock @ 0x4 1 SpriteKit SKSpinLockSync(int*, void() 
> block_pointer) @ 0x20 2 SpriteKit 
> -[SKTexture loadImageData] @ 0xec 3 SpriteKit 
> -[SKTexture size] @ 0x28 4 SpriteKit SKCEmitterSprite::update(double) @ 0x117c 5 CorpBoard @ 0x48d44 6 CorpBoard @ 0xfbc50 7 CorpBoard @ 
> 0xfa6f0 8 CorpBoard @ 0xfa070 9 UIKit 
> -[UITableView _createPreparedCellForGlobalRow:withIndexPath:willDisplay:] @ 0x21c 10 UIKit 
> -[UITableView _updateVisibleCellsNow:isRecursive:] @ 0x934 11 UIKit 
> -[UITableView layoutSubviews] @ 0xa8 12 UIKit 
> -[UIView(CALayerDelegate) layoutSublayersOfLayer:] @ 0x238 13 QuartzCore 
> -[CALayer layoutSublayers] @ 0xa4 14 QuartzCore CA::Layer::layout_if_needed(CA::Transaction*) @ 0x13c 15 QuartzCore 
> CA::Layer::layout_and_display_if_needed(CA::Transaction*) @ 0x1c 16 
> QuartzCore CA::Context::commit_transaction(CA::Transaction*) @ 0x110 
> 17 QuartzCore CA::Transaction::commit() @ 0x1b0 18 QuartzCore 
> CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned 
> long, void*) @ 0x4c 19 CoreFoundation 
> __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ @ 0x1c 20 CoreFoundation 
> __CFRunLoopDoObservers @ 0x164 21 CoreFoundation 
> __CFRunLoopRun @ 0x340 22 CoreFoundation CFRunLoopRunSpecific @ 0x188 23 GraphicsServices GSEventRunModal @ 0xa4 24 UIKit UIApplicationMain 
> @ 0x5cc 25 CorpBoard @ 0x5be80 26 libdyld.dylib start @ 0x0 Thread 1 0 
> libsystem_kernel.dylib kevent64 @ 0x8 1 libdispatch.dylib 
> _dispatch_mgr_invoke @ 0x110 2 libdispatch.dylib 
> _dispatch_mgr_thread @ 0x30 Thread 2 0 libsystem_kernel.dylib 
> __workq_kernreturn @ 0x8 1 libsystem_pthread.dylib 
> _pthread_wqthread @ 0x3dc 2 libsystem_pthread.dylib start_wqthread @ 0x0 Thread 3 0 libsystem_kernel.dylib 
> __workq_kernreturn @ 0x8 1 libsystem_pthread.dylib 
> _pthread_wqthread @ 0x3dc 2 libsystem_pthread.dylib start_wqthread @ 0x0 Thread 4 0 libsystem_kernel.dylib 
> __workq_kernreturn @ 0x8 1 libsystem_pthread.dylib 
> _pthread_wqthread @ 0x3dc 2 libsystem_pthread.dylib start_wqthread @ 0x0 Thread 5 0 libsystem_kernel.dylib 
> __workq_kernreturn @ 0x8 1 libsystem_pthread.dylib 
> _pthread_wqthread @ 0x3dc 2 libsystem_pthread.dylib start_wqthread @ 0x0 Thread 6 0 libsystem_kernel.dylib 
> __workq_kernreturn @ 0x8 1 libsystem_pthread.dylib 
> _pthread_wqthread @ 0x3dc 2 libsystem_pthread.dylib start_wqthread @ 0x0 Thread 7 0 libsystem_kernel.dylib mach_msg_trap @ 0x8 1 
> libsystem_kernel.dylib mach_msg @ 0x44 2 CoreFoundation 
> __CFRunLoopServiceMachPort @ 0xc4 3 CoreFoundation 
> __CFRunLoopRun @ 0x3a8 4 CoreFoundation CFRunLoopRunSpecific @ 0x188 5 Foundation 
> -[NSRunLoop(NSRunLoop) runMode:beforeDate:] @ 0x138 6 Foundation 
> -[NSRunLoop(NSRunLoop) run] @ 0x5c 7 CorpBoard @ 0x206a28 8 Foundation 
> __NSThread__main__ @ 0x42c 9 libsystem_pthread.dylib 
> _pthread_body @ 0xa0 10 libsystem_pthread.dylib 
> _pthread_start @ 0x9c 11 libsystem_pthread.dylib thread_start @ 0x0 Thread 8 0 libsystem_kernel.dylib mach_msg_trap @ 0x8 1 
> libsystem_kernel.dylib mach_msg @ 0x44 2 CoreFoundation 
> __CFRunLoopServiceMachPort @ 0xc4 3 CoreFoundation 
> __CFRunLoopRun @ 0x3a8 4 CoreFoundation CFRunLoopRunSpecific @ 0x188 5 CFNetwork 
> +[NSURLConnection(Loader) _resourceLoadLoop:] @ 0x1b4 6 Foundation 
> __NSThread__main__ @ 0x42c 7 libsystem_pthread.dylib 
> _pthread_body @ 0xa0 8 libsystem_pthread.dylib 
> _pthread_start @ 0x9c 9 libsystem_pthread.dylib thread_start @ 0x0 Thread 9 0 libsystem_kernel.dylib 
> __select @ 0x8 1 CoreFoundation 
> __CFSocketManager @ 0x290 2 libsystem_pthread.dylib 
> _pthread_body @ 0xa0 3 libsystem_pthread.dylib 
> _pthread_start @ 0x9c 4 libsystem_pthread.dylib thread_start @ 0x0 Thread 10 0 libsystem_kernel.dylib mach_msg_trap @ 0x8 1 
> libsystem_kernel.dylib mach_msg @ 0x44 2 CoreFoundation 
> __CFRunLoopServiceMachPort @ 0xc4 3 CoreFoundation 
> __CFRunLoopRun @ 0x3a8 4 CoreFoundation CFRunLoopRunSpecific @ 0x188 5 CoreFoundation CFRunLoopRun @ 0x6c 6 CoreMotion @ 0x4298c 7 
> libsystem_pthread.dylib 
> _pthread_body @ 0xa0 8 libsystem_pthread.dylib 
> _pthread_start @ 0x9c 9 libsystem_pthread.dylib thread_start @ 0x0 Thread 11 0 libsystem_kernel.dylib 
> __workq_kernreturn @ 0x8 1 libsystem_pthread.dylib 
> _pthread_wqthread @ 0x3dc 2 libsystem_pthread.dylib start_wqthread @ 0x0 

Похожие код:

NSTimer *space; 

-(void)goToSpace { 

    [self shootingStar]; 

    double lifetime; 
    SKEmitterNode *emitterNode1 = [self starFieldEmitter:[SKColor lightGrayColor] starSpeedY:1 starsPerSecond:.1 starScaleFactor:0.08]; 

    lifetime = self.frame.size.height * [[UIScreen mainScreen] scale]/1; 
    [emitterNode1 advanceSimulationTime:lifetime]; 
    emitterNode1.zPosition = -10; 
    [self addChild:emitterNode1]; 

    SKEmitterNode *emitterNode2 = [self starFieldEmitter:[SKColor lightGrayColor] starSpeedY:.8 starsPerSecond:.08 starScaleFactor:0.06]; 
    emitterNode2.zPosition = -11; 
    lifetime = self.frame.size.height * [[UIScreen mainScreen] scale]/.8; 
    [emitterNode2 advanceSimulationTime:lifetime]; 
    [self addChild:emitterNode2]; 

    SKEmitterNode *emitterNode3 = [self starFieldEmitter:[SKColor grayColor] starSpeedY:.5 starsPerSecond:.5 starScaleFactor:0.03]; 
    emitterNode3.zPosition = -12; 
    lifetime = self.frame.size.height * [[UIScreen mainScreen] scale]/.5; 
    [emitterNode3 advanceSimulationTime:lifetime]; 
    [self addChild:emitterNode3]; 

    space = [NSTimer scheduledTimerWithTimeInterval:2 target:self selector:@selector(shootingStar) userInfo:nil repeats:YES]; 

} 

-(SKEmitterNode *)starFieldEmitter:(SKColor *)color starSpeedY:(CGFloat)starSpeedY starsPerSecond:(CGFloat)starsPerSecond starScaleFactor:(CGFloat) starScaleFactor { 

    SKEmitterNode *emitterNode = [SKEmitterNode node]; 

    CGFloat lifetime = self.frame.size.height * [[UIScreen mainScreen] scale]/starSpeedY; 

    emitterNode.particleTexture = [SKTexture textureWithImage:[UIImage imageNamed:@"stars"]]; 
    emitterNode.particleBirthRate = starsPerSecond; 
    emitterNode.particleColor = [SKColor lightGrayColor]; 
    emitterNode.particleSpeed = starSpeedY * -1; 
    emitterNode.particleScale = starScaleFactor; 
    emitterNode.particleColorBlendFactor = 1; 
    emitterNode.particleLifetime = lifetime; 

    int rndValue = 1 + arc4random() % (45 - 1); 
    emitterNode.particleRotation = rndValue; 

    emitterNode.position = CGPointMake(self.frame.size.width/2, self.frame.size.height); 
    emitterNode.particlePositionRange = CGVectorMake(self.frame.size.width, self.frame.size.height); 
    return emitterNode; 
} 

-(BOOL) getYesOrNo { 

    int tmp = (arc4random() % 30)+1; 
    if(tmp % 5 == 0) 
     return YES; 
    return NO; 
} 

-(void)shootingStar { 

    BOOL left = [self getYesOrNo]; 
    int xPos = 0; 
    int height = self.frame.size.height; 
    int yPos = 1 + arc4random() % (height - 1); 
    if (left) { 
     xPos = -50; 
    } else { 
     xPos = self.frame.size.width + 50; 
    } 

    SKEmitterNode *shootingstar = [SKEmitterNode node]; 
    shootingstar = [NSKeyedUnarchiver unarchiveObjectWithFile:[[NSBundle mainBundle] pathForResource:@"spark" ofType:@"sks"]]; 

    CGPoint xy = CGPointMake(xPos, yPos); 
    shootingstar.position = xy; 
    shootingstar.name = @"shootingStar"; 
    shootingstar.zPosition = -2.0; 
    shootingstar.targetNode = self.scene; 
    [self addChild:shootingstar]; 

    //make random size to simulate distance 
    float val = [self randFloatBetween:.1 and:.5]; 
    SKAction *scale = [SKAction scaleBy:val duration:0]; 
    [shootingstar runAction: scale completion:nil]; 

    //now set speed depending on size (smaller = farther = slower) 
    int dur = 0; 
    if (val < .2) dur = 5; 
    else if (val < .35) dur = 3; 
    else dur = 2; 

    int moveY = -500 + arc4random() % (500 - -500); 
    int moveX; 
    if (left) { 
     moveX = 500; 
    } else { 
     moveX = -500; 
    } 
    SKAction *move = [SKAction moveByX:moveX y:moveY duration:dur]; 
    int waitDuration = 2 + arc4random() % (5 - 2); 
    SKAction *wait = [SKAction waitForDuration:waitDuration]; 
    SKAction *sequence = [SKAction sequence:@[wait, move]]; 

    [shootingstar runAction:sequence completion:^{ 
     [shootingstar removeFromParent]; 
     //[self shootingStar]; 
    }]; 
} 

-(float) randFloatBetween:(float)low and:(float)high { 

    float diff = high - low; 
    return (((float) rand()/RAND_MAX) * diff) + low; 
} 

Answer 1

Я был в состоянии решить мою проблему, ссылаясь на пару ответов от: this similar question

В моей Случай, образ, который я использовал для звезд, Stars.png, был в моем каталоге проектов. Я переместил его в Images.xcassets и добавил @ 2x и @ 3x версии изображения. Это решило мою проблему, хотя я не совсем понимаю, почему.