didBeginContact :( SKPhysicsContact *)联系人未被调用

我创建了SKSceneinheritance的类。 问题是关于物理体接触的方法

 - (void)didBeginContact:(SKPhysicsContact *)contact 

是不是调用解决方案可能很简单,但作为初学者与精灵工具包我坚持这个。

以下是代码

 #import "MyScene.h" @interface MyScene () @property BOOL contentCreated; @end @implementation MyScene - (id)initWithSize:(CGSize)size { self = [super initWithSize:size]; if (self) { self.physicsWorld.contactDelegate = self; self.physicsBody = [SKPhysicsBody bodyWithEdgeLoopFromRect:self.frame]; } return self; } - (void)didMoveToView:(SKView *)view { if (!self.contentCreated) { [self buildWorld]; self.physicsWorld.contactDelegate = self; } } #pragma mark - World Building - (void)buildWorld { NSLog(@"Building the world"); SKSpriteNode * sprite1 = [[SKSpriteNode alloc] initWithColor:[SKColor grayColor] size:CGSizeMake(100,100)]; sprite1.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:CGSizeMake(100,100)]; sprite1.position = CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame) +100); SKSpriteNode * sprite2 = [[SKSpriteNode alloc] initWithColor:[SKColor grayColor] size:CGSizeMake(100,100)]; sprite2.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:CGSizeMake(100,100)]; sprite2.position = CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame) - 100); [self addChild:sprite1]; [self addChild:sprite2]; } - (void)didBeginContact:(SKPhysicsContact *)contact { NSLog(@"contact"); } @end 

提前致谢。

来自SKPhysicsWorld文档:

当两个物理contactTestBitMask重叠并且其中一个物理contactTestBitMask具有与另一个contactTestBitMaskcategoryBitMask属性重叠的contactTestBitMask属性时,将创建一个联系人。

您必须为物理主体分配categoryBitMaskcontactTestBitMask 。 您想先创建类别:

 static const uint32_t sprite1Category = 0x1 << 0; static const uint32_t sprite2Category = 0x1 << 1; 

接下来,分配类别和联系测试位掩码:

 sprite1.physicsBody.categoryBitMask = sprite1Category; sprite1.physicsBody.contactTestBitMask = sprite2Category; sprite2.physicsBody.categoryBitMask = sprite2Category; sprite2.physicsBody.contactTestBitMask = sprite1Category; 

SKPhysicsBody文档中的注释:

为获得最佳性能,只需在联系人掩码中设置您感兴趣的交互位。