问题:

I have a player in my game, it has two states flying, falling. Each of them has an image: player_flying, player_falling correspondingly. I am also using a physical bodies to detect collision. It is completely normally functioning when I use one texture. But when I am trying to use both in different conditions using different textures, it shows me an error in the log. I am trying it like that:

if (self.player.physicsBody.velocity.dy > 30) {     self.player.texture = [SKTexture textureWithImageNamed:@"player_flying"];     self.player.physicsBody = [SKPhysicsBody bodyWithTexture:self.player.texture                                                         size:self.player.size];         } else {     self.player.texture = [SKTexture textureWithImageNamed:@"player_falling"];     self.player.physicsBody = [SKPhysicsBody bodyWithTexture:self.player.texture                                                         size:self.player.size]; }

the error is:

2014-08-30 12:55:47.515 kalabaska[1569:50535] PhysicsBody: Could not create physics body.

回答1:

thanks 0x141E, i found out that my texture had some white shit around it, after I've deleted it, everything started to work. Now i am wondering how to hide stroke around my texture which represents my physical object.

回答2:

You shouldn't change the texture and physics body of player at the update rate (up to 60 times a second). You should change them only when needed. Here's an example of how to do that:

if (self.player.physicsBody.velocity.dy > 30) {     // Change texture/body only if not already flying     if (!isFlying) {         self.player.texture = [SKTexture textureWithImageNamed:@"player_flying"];         self.player.physicsBody = [SKPhysicsBody bodyWithTexture:self.player.texture                                                         size:self.player.size];         isFlying = YES;     }       } else {     // Change texture/body only if not already falling     if (isFlying) {         self.player.texture = [SKTexture textureWithImageNamed:@"player_falling"];         self.player.physicsBody = [SKPhysicsBody bodyWithTexture:self.player.texture                                                         size:self.player.size];         isFlying = NO;    } }

转载请标明出处:SpriteKit PhysicsBody: Could not create physics body

文章来源: SpriteKit PhysicsBody: Could not create physics body

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texture