Spritekit bodyWithbodies does not work

Question

我想我的spritenode有多個physicbodies。我使用bodyWithbodies並添加了phyisicbodies。但沒有檢測到碰撞。

下面的方法創建spritenode其中應該有更多physicbodies。

-(void)spawnBrick 
{ 
    SKPhysicsBody *brickLeftEdge = [SKPhysicsBody bodyWithEdgeFromPoint:CGPointMake(brick.size.width - brick.size.width, brick.size.height - brick.size.height) toPoint:CGPointMake(brick.size.width - brick.size.width, brick.size.height)]; 
    brickLeftEdge.categoryBitMask = brickLeftEdgeCategory; 
    brickLeftEdge.contactTestBitMask = leftEdgeCategory; 

SKPhysicsBody *brickRightEdge = [SKPhysicsBody bodyWithEdgeFromPoint:CGPointMake(brick.size.width, brick.size.height - brick.size.height) toPoint:CGPointMake(brick.size.width, brick.size.height)]; 
brickRightEdge.categoryBitMask = brickRightEdgeCategory; 
brickRightEdge.contactTestBitMask = rightEdgeCategory; 

brick = [[BrickNodeOne alloc] init]; 
brick.name = @"Brick"; 

NSArray *array = [self objectForKeyedSubscript:@"Brick"]; 
BrickNodeOne *oldBrick; 
if ([array count] > 0) { 
    oldBrick = [array objectAtIndex:([array count]-1)]; 
} 
brick.position = CGPointMake(brick.size.width/2, (brick.size.height + oldBrick.position.y)-15); 
brick.physicsBody = [SKPhysicsBody bodyWithBodies:@[brickLeftEdge, brickRightEdge]]; 

    brick.physicsBody.collisionBitMask = 0; 
    [self addChild:brick]; 
} 

在DidMoveToView我聲明瞭屏幕的碰撞檢測左和右邊緣與spritenode

// setup edges 
_leftEdge = [[SKNode alloc] init]; 
// heigt + 1000 = for spawned objects above screen 
_leftEdge.physicsBody = [SKPhysicsBody bodyWithEdgeFromPoint:CGPointMake(0.0, 0.0) toPoint:CGPointMake(0.0, self.size.height + 1000)]; 
_leftEdge.physicsBody.dynamic = NO; 
_leftEdge.physicsBody.categoryBitMask = leftEdgeCategory; 
_leftEdge.physicsBody.contactTestBitMask = brickLeftEdgeCategory; 
_leftEdge.position = CGPointZero; 
[self addChild:_leftEdge]; 

_rightEdge = [[SKNode alloc] init]; 
// heigt + 1000 = for spawned objects above screen 
_rightEdge.physicsBody = [SKPhysicsBody bodyWithEdgeFromPoint:CGPointMake(self.size.width, 0.0) toPoint:CGPointMake(self.size.width, self.size.height + 1000)]; 
_rightEdge.physicsBody.dynamic = NO; 
_rightEdge.physicsBody.categoryBitMask = rightEdgeCategory; 
_rightEdge.physicsBody.contactTestBitMask = brickRightEdgeCategory; 
[self addChild:_rightEdge]; 

以下代碼包含位掩碼信息：

我在頭部聲明SKPhysicsContactDelegate文件。設置委託在didMoveToView

static const uint32_t leftEdgeCategory   = 0x1 << 0; 
static const uint32_t rightEdgeCategory   = 0x1 << 1; 
static const uint32_t brickLeftEdgeCategory  = 0x1 << 2; 
static const uint32_t brickRightEdgeCategory = 0x1 << 3; 
static const uint32_t kCarCategory    = 0x1 << 4; 

信息發表評論

所以我改變了physicsbody從邊緣到矩形，檢測不幸的是沒有接觸。

SKPhysicsBody *brickLeftEdge = [SKPhysicsBody bodyWithRectangleOfSize:CGSizeMake(40, brick.size.height) center:CGPointMake((brick.size.width - brick.size.width) + 20 , self.size.height/2)]; 
brickLeftEdge.categoryBitMask = brickLeftEdgeCategory; 
brickLeftEdge.contactTestBitMask = leftEdgeCategory; 

SKPhysicsBody *brickRightEdge = [SKPhysicsBody bodyWithRectangleOfSize:CGSizeMake(40, brick.size.height) center:CGPointMake(brick.size.width - 20, brick.size.height/2)]; 
brickRightEdge.categoryBitMask = brickRightEdgeCategory; 
brickRightEdge.contactTestBitMask = rightEdgeCategory; 

Answer 1

您遇到的問題與您使用靜態物理實體有關。這是一個從約bodyWithEdgeFromPoint: toPoint方法文檔：

的邊緣不具有體積或質量，並且總是如如果動態 屬性等於NO處理。 邊緣可能僅與基於體積的 物理機構相沖突。

僅當至少有一個物體被定義爲動態（基於體積的物理物體默認爲動態物體）時纔會發生碰撞。