联系人丢失

Question

我很抱歉发布此信息，我知道它之前已经被询问过，但我已经尝试了以前的解决方案，但似乎没有任何工作。

我遇到的问题是我同时使用了didBeginContact和didEndContact来确定我的精灵是否触及地面。

这个精灵有一个名为的BOOL，它接地，它决定了这个状态。基本上我想知道它是否在地面上触摸平台时。我得到的结果是与平台建立联系，然后立即失去联系之间的一场持续战斗，这非常令人沮丧。这是我到目前为止有：

-(Player *)createPlayer 
{ 
    ... 
    sprite.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:player.size]; 
    sprite.physicsBody.mass = 0.02; 
    sprite.physicsBody.restitution = 0; 
    sprite.physicsBody.categoryBitMask = playerCategory; 
    sprite.physicsBody.collisionBitMask = platformCategory; 
    sprite.physicsBody.contactTestBitMask = platformCategory; 
    sprite.physicsBody.usesPreciseCollisionDetection = YES; 
    return sprite; 
} 
-(SKSpriteNode *)createPlatform 
{ 
    SKSpriteNode *platform = [[SKSpriteNode alloc] initWithColor:[SKColor grayColor] size:CGSizeMake(100,25)]; 
    platform.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:player.size]; 
    platform.dynamic = NO; 
    platform.physicsBody.categoryBitMask = platformCategory; 
    platform.physicsBody.collisionBitMask = playerCategory; 
    platform.physicsBody.contactTestBitMask = playerCategory; 
    return platform; 
} 

-(void)didBeginContact:(SKPhysicsContact *)contact 
{ 
    SKPhysicsBody *firstBody, *secondBody; 

    if(contact.bodyA.categoryBitMask < contact.B.categoryBitMask) 
    { 
     firstBody = contact.bodyA; 
     secondBody = contact.bodyB; 
    } 
    else 
    { 
     firstBody = contact.bodyB; 
     secondBody = contact.bodyA; 
    } 
    if((firstBody.categoryBitMask & playerCategory) != 0) 
    { 
     Player *player = firstBody.node; 
     if((secondBody.categoyBitMask & platformCategoy) != 0) 
     { 
      NSLog(@"Connection Established"); 
      player.grounded = YES; 
     } 
    } 
} 

-(void)didEndContact:(SKPhysicsContact *)contact 
{ 
    SKPhysicsBody *firstBody, *secondBody; 

    if(contact.bodyA.categoryBitMask < contact.B.categoryBitMask) 
    { 
     firstBody = contact.bodyA; 
     secondBody = contact.bodyB; 
    } 
    else 
    { 
     firstBody = contact.bodyB; 
     secondBody = contact.bodyA; 
    } 
    if((firstBody.categoryBitMask & playerCategory) != 0) 
    { 
     Player *player = firstBody.node; 
     if((secondBody.categoyBitMask & platformCategoy) != 0) 
     { 
      NSLog(@"Connection Lost"); 
      player.grounded = NO; 
     } 
    } 
} 

基本上这样做的最终结果是这样的，当我检查日志：

• 联系成立
• 联系迷失
• 联系方式建立
• 联系人丢失

非常感谢您提供的任何帮助，我完全难住。

Answer 1

-(void)didEndContact:(SKPhysicsContact *)contact 
{ 

    uint32_t collision = (contact.bodyA.categoryBitMask | contact.bodyB.categoryBitMask); 

    if (collision != (playerCategory | platformCategory)) { 
     SKNode *node = contact.bodyA.node; 
     if (contact.bodyB.categoryBitMask == platformCategory) { 
      node = contact.bodyB.node; 
     } 
NSLog(@"Connection Lost"); 
      player.grounded = NO; 
    }