Sprite Kit iOS 7.1 在 wasRemovedFromTargetAtTime 上崩溃

Question

我在 iOS 7.1 上的 Sprite Kit 中发生了崩溃。我尝试使用 Xcode 5.0.2 和 5.1 构建。结果是一样的。在 iOS 7.1 设备上仍然崩溃。

这里附上截图。

我找到了导致崩溃的代码。

- (WATDirection *)panDown {
WATDirection *direction = [[WATDirection alloc] init];

CGFloat newY = 830;

@weakify(self)
[direction addStartHandler:^(WATDirection *direction) {
    @strongify(self)

    self.panningDown = YES;

    [self runAction:[self animateNextArrowFadeOut] withKey:@"next_arrow"];

    // Move the scene
    SKAction *panDown = [SKAction moveToY:newY duration:1.5];
    panDown.timingMode = SKActionTimingEaseInEaseOut;

    [self.rootNode runAction:panDown withKey:@"panDown"];

    // Fade in the pipes
    SKNode *pipes = [self.rootNode childNodeWithName:@"pipes"];

    SKAction *fadeIn = [SKAction sequence:@[
        [SKAction waitForDuration:0.3],
        [SKAction fadeAlphaTo:1 duration:0.6]
    ]];

    [pipes runAction:fadeIn withKey:@"fadeIn"];

    [pipes enumerateChildNodesWithName:@"pipe" usingBlock:^(SKNode *node, BOOL *stop) {
        SKAction *fadeIn = [SKAction sequence:@[
            [SKAction waitForDuration:1.1],
            [SKAction fadeAlphaTo:1 duration:0.6],
        ]];

        [node runAction:fadeIn withKey:@"fadeIn"];
    }];

    // Fade out the overlay
    SKNode *pipesOverlay = [pipes childNodeWithName:@"pipes_overlay"];

    SKAction *fadeOut = [SKAction sequence:@[
        [SKAction waitForDuration:3.0],
        [SKAction fadeAlphaTo:0 duration:0.5],
        [SKAction removeFromParent]
    ]];

    [pipesOverlay runAction:fadeOut withKey:@"fadeOut"];

    [self runAction:[SKAction sequence:@[
        [SKAction waitForDuration:3.5],
        [SKAction runBlock:^{
            [direction finish];
        }]
    ]]];
}];

[direction addFinishHandler:^(WATDirection *direction) {
    @strongify(self)

    [self runAction:[self animateNextArrowFadeIn] withKey:@"next_arrow"];

    self.panningDown = NO;
    self.pannedDown = YES;
}];

[direction addCancelHandler:^(WATDirection *direction) {
    @strongify(self)

    SKAction *panDown = [SKAction moveToY:newY duration:0];

    [self.rootNode runAction:panDown withKey:@"panDown"];

    SKNode *pipesOverlay = [self childNodeWithName:@"//pipes_overlay"];
    [pipesOverlay removeFromParent];

    [self runAction:[self animateNextArrowFadeIn] withKey:@"next_arrow"];

    self.panningDown = NO;
    self.pannedDown = YES;
}];

return direction;

}

这两行是问题：

@strongify(self)

    [self runAction:[self animateNextArrowFadeIn] withKey:@"next_arrow"];

对此有什么想法吗？

Answer 1

发现问题。有 2 个动作具有相同的 animationKey @"next_arrow"。

[self runAction:[self animateNextArrowFadeIn] withKey:@"next_arrow"];

第二个动作在第一个动作完成之前开始。第二个动作尝试从队列中删除带有该键的动画，但没有使用该键的动作，因为第一个动作从队列中删除了该键。

解决方法是重命名第二个动画的操作键。

[self runAction:[self animateNextArrowFadeIn] withKey:@"next_arrow_down"];

感谢大家的支持！