Sprite Kit iOS 7.1在removeFromParent上崩溃

Question

我已将iPad Air更新为7.1,将Xcode更新为5.1.Xcode想要将我的项目更新为推荐的设置,我同意了.

之后,当我从父节点删除节点时,我的游戏开始在几个地方崩溃.

这对我来说是一个惊喜 - 在更新之前没有过境点.我恢复了我的项目并找出了Xcode对它做了什么 - 只更改架构字符串:

之前:更新前的 架构http://i57.tinypic.com/68v4nr.png

之后:更新后的 架构http://i61.tinypic.com/vpeo2a.png

在旧版本中没有崩溃.如果我在新版本中删除arm64支持,则不会崩溃.在模拟器中,新旧版本都没有崩溃.

我的代码应该在哪里注意？

代码堆栈:

SpriteKit`SKCSprite::removeSubsprite(SKCSprite*):
0x1859442cc:  stp    fp, lr, [sp, #-16]!
0x1859442d0:  add    fp, sp, 0
0x1859442d4:  stp    x20, x19, [sp, #-16]!
0x1859442d8:  sub    sp, sp, #16
0x1859442dc:  mov    x19, x0
0x1859442e0:  str    x1, [sp, #8]
0x1859442e4:  add    x20, sp, 8
0x1859442e8:  add    x0, x19, 544
0x1859442ec:  mov    x1, x20
0x1859442f0:  bl     0x18594872c               ; unsigned long std::__1::__tree<SKCSprite*, std::__1::less<SKCSprite*>, std::__1::allocator<SKCSprite*> >::__erase_unique<SKCSprite*>(SKCSprite* const&)
0x1859442f4:  add    x0, x19, 464
0x1859442f8:  mov    x1, x20
0x1859442fc:  bl     0x185948218               ; std::__1::list<SKCSprite*, std::__1::allocator<SKCSprite*> >::remove(SKCSprite* const&)
0x185944300:  ldr    x20, [sp, 1]
0x185944304:  ldrb   w8, [x20, #18]
0x185944308:  ldrh   w9, [x20, #16]
0x18594430c:  orr    w8, w9, w8, lsl #16
0x185944310:  tbnz   w8, #1, 0x185944324       ; SKCSprite::removeSubsprite(SKCSprite*) + 88
0x185944314:  ldr    x9, [x20, 61]
0x185944318:  ldr    x9, [x9, 2]
0x18594431c:  cbnz   x9, 0x185944324           ; SKCSprite::removeSubsprite(SKCSprite*) + 88
0x185944320:  tbz    w8, #8, 0x185944330       ; SKCSprite::removeSubsprite(SKCSprite*) + 100
0x185944324:  mov    x0, x19
0x185944328:  mov    x1, x20
0x18594432c:  bl     0x18594828c               ; SKCSprite::removeFromOffscreenList(SKCSprite*)
0x185944330:  str    xzr, [x20, #392]
0x185944334:  ldr    x8, [x20, 0]
0x185944338:  ldr    x8, [x8, 10]
0x18594433c:  mov    x0, x20
0x185944340:  blr    x8
0x185944344:  ldrh   w8, [x19, #20]
0x185944348:  orr    w9, w8, #0x40
0x18594434c:  strh   w9, [x19, #20]
0x185944350:  ldr    x8, [x19, 49]
0x185944354:  cbz    x8, 0x185944388           ; SKCSprite::removeSubsprite(SKCSprite*) + 188
0x185944358:  add    x9, x19, 392
0x18594435c:  ldrh   w10, [x8, #20]
0x185944360:  orr    w10, w10, #0x40
0x185944364:  strh   w10, [x8, #20]
0x185944368:  ldr    x8, [x9, 0]
0x18594436c:  add    x9, x8, 392
0x185944370:  ldrh   w10, [x8, #20]
0x185944374:  orr    w10, w10, #0x40
0x185944378:  strh   w10, [x8, #20]
0x18594437c:  ldr    x8, [x8, 49]
0x185944380:  cbnz   x8, 0x18594435c           ; SKCSprite::removeSubsprite(SKCSprite*) + 144

0x185944384:  ldrh   w9, [x19, #20]  EXC_BAD_ACCESS here.

0x185944388:  orr    w8, w9, #0x2
0x18594438c:  strh   w8, [x19, #20]
0x185944390:  b      0x185944398               ; SKCSprite::removeSubsprite(SKCSprite*) + 204
0x185944394:  ldrh   w8, [x19, #20]
0x185944398:  tbnz   w8, #7, 0x1859443ac       ; SKCSprite::removeSubsprite(SKCSprite*) + 224
0x18594439c:  orr    w8, w8, #0x80
0x1859443a0:  strh   w8, [x19, #20]
0x1859443a4:  ldr    x19, [x19, 49]
0x1859443a8:  cbnz   x19, 0x185944394          ; SKCSprite::removeSubsprite(SKCSprite*) + 200
0x1859443ac:  sub    sp, fp, #16
0x1859443b0:  ldp    x20, x19, [sp], #16
0x1859443b4:  ldp    fp, lr, [sp], #16
0x1859443b8:  ret    lr

更新:新信息:

我的错误:

错误http://i58.tinypic.com/30iizih.png

堆:

调用堆栈http://i61.tinypic.com/e6vswj.png

我发现了一些错误.我要移除的节点包括两个SKSpriteNodes(我的精灵图像及其阴影)和一个SKShapeNode(一根细黑绳).我试图用SKSpriteNode绳索替换我的SKShapeNode绳索,我获得了成功 - 问题消失了.

从父级删除我的节点的代码:

SKAction *moveCloud = [SKAction moveToX:destinationX duration:moveDuration];
[cloud runAction:moveCloud completion:^{
    [cloud removeFromParent];
}];

用于向我的节点添加SKShapeNode绳索的代码:

- (void)addRopeToCloud:(SKNode *)cloud
{
    CGFloat maxY = self.scene.size.height;
    CGFloat length = maxY - [self.scene convertPoint:cloud.position fromNode:cloud.parent].y;

    CGMutablePathRef path = CGPathCreateMutable();
    CGPathMoveToPoint(path, NULL, 0, 0);
    CGPathAddLineToPoint(path, NULL, 0, length);

    SKShapeNode *rope = [[SKShapeNode alloc] init];
    rope.path = path;
    rope.strokeColor = [UIColor blackColor];
    rope.lineWidth = 0.1;
    rope.antialiased = YES;
    rope.zPosition = -0.01;

    CGFloat threadScale = 1 / cloud.xScale;

    rope.xScale = threadScale;
    rope.yScale = threadScale;

    [cloud addChild:rope];
    CGPathRelease(path);
}

用于向我的节点添加SKSpriteNode绳索的代码,用于解决问题:

- (void)addRopeToCloud:(SKNode *)cloud
{
    CGFloat maxY = self.scene.size.height;
    CGFloat length = maxY - [self.scene convertPoint:cloud.position fromNode:cloud.parent].y;

    CGSize ropeSize = CGSizeMake(1.5, length);
    SKSpriteNode *rope = [SKSpriteNode spriteNodeWithColor:[SKColor blackColor] size:ropeSize];
    rope.anchorPoint = CGPointMake(0.5, 0);

    CGFloat ropeScale = 1 / cloud.xScale;
    rope.xScale = ropeScale;
    rope.yScale = ropeScale;

    rope.zPosition = -0.01;

    [cloud addChild:rope];
}

我的SKShapeNode添加代码看起来有些不对劲,但我无法理解究竟是什么.

Answer 1

当 SKShapeNode 的父级从 iOS 7.1 中的超级视图中删除时，我也会崩溃。

我的解决方法是在从父级中删除之前将 SKShapeNode 属性设置为 nil