Question

//很可能是一个小小的错误...... 如果拖动磁贴击中TargetNodeCatagoryT1，则冲突有效但是如何在命中对象上设置BOOL？

if (firstBody.categoryBitMask == DragTileCategory &&
    secondBody.categoryBitMask == TargetNodeCatagoryT1 ){

   TargetNode *hitNode = (TargetNode *) secondBody.node;
    hitNode.hasHitT1 = YES; <<this crashes app
    but I wish to send BOOl back...
}

错误日志： 由于未捕获的异常终止应用程序＆＃39; NSInvalidArgumentException＆＃39;，原因：＆＃39; - [SKSpriteNode setHasHitT1：]：无法识别的选择器发送到实例

Thank's Knight0fDragon You are right, the "hitNode" are SKSpriteNodes 
nested within the TargetNode class - each TargetClass has 3 targets,


 BOOLS are declared in .h and synthesised in .m   
    @interface TargetNode : SKNode 
    BOOL hasHitTarget1;
    BOOL hasHitTarget2;
    BOOL hasHitTTarget3;

 //later
    @property (nonatomic,assign) BOOL hasHitTarget1;
    @property (nonatomic,assign) BOOL hasHitTarget2;
    @property (nonatomic,assign) BOOL hasHitTarget3;

 @implementation TargetNode
 @synthesize hasHitTarget1,hasHitTarget2,hasHitTarget3;

 -(id)initWithImageNamed:(NSString*)imageName labelText:(NSString*)labelText
 other stuff here....then

   hasHitTarget1 = NO;
   hasHitTarget2 = NO;
   hasHitTarget3 = NO;

按照以下方式工作： 将physicsBody附加到我想稍后更改的标签上（如果我能找到第二个身体，那么physicsBody有点像一个标记。节点我可以改变文本......可能这不是最好的方法 - 但它适用于我的目的：）

//附上physicsBody 例如T1label.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize ...

//找到对象secondBody

在didMakeContact中 secondBody.categoryBitMask == TargetNodeCatagoryT1）{

    //Convert second body into useable object 
    SKLabelNode *hitNode = (SKLabelNode *) secondBody.node;

    //change text
    hitNode.text =@"test";

    NSLog(@"TargetNode Name@%@",hitNode.name);

    //Test type of object
    NSLog(@"hitNode isMemberOfClass  TargetNode: %@", [hitNode isMemberOfClass:[TargetNode class]] ? @"YES":@"NO");
    NSLog(@"hitNode isMemberOfClass  SKSpriteNode: %@", [hitNode isKindOfClass:[SKLabelNode class]] ? @"YES":@"NO");  
}

Answer 1

这是失败的，因为您hitNode不是TargetNode，即使您声称它是[hitNode isKindOfClass:]。使用[hitNode isMemberOfClass:]或hitNode来验证setHasHitT1是什么。

唯一的另一个问题是你没有正确地创建你的属性，或者它没有为你合成，并且hitNode.hasHitT1 = YES;从未被创建，因此{{1}}失败

SKPhysics节点以及如何将BOOL发送到正确的对象

1 个答案: