Question

问题：我的播放器不跳。它似乎对.applyImpulse没有响应，我在播放器的物理主体上调用它。如何使它跳跃？

这是我的第一场比赛，所以我不确定问题的根源在哪里。我已经在下面解释了相关的位。

在GameplayScene类中...

我设置了createPlayer（）中使用的播放器变量
```
var player = Player();
```

调用createPlayer（）作为初始化函数的一部分

func createPlayer() {
  player = Player(imageNamed: "testPlayer");
  player.initialize();
  player.position = CGPoint(x: -580, y: 200);

  self.addChild(player);
}

覆盖开始触摸功能

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
  print("in touchesBegan");
  player.jump();
}

在Player类中...

通过初始化函数中调用的辅助函数为播放器设置物理主体

func setPhysics() {
  self.physicsBody = SKPhysicsBody(texture: self.texture!, size: self.texture!.size());
  self.setScale(0.25);

  self.physicsBody?.usesPreciseCollisionDetection = true;
  self.physicsBody?.categoryBitMask = PhysicsCategory.Player;
  self.physicsBody?.affectedByGravity = true;
  self.physicsBody?.allowsRotation = false;

  self.physicsBody?.collisionBitMask = PhysicsCategory.Ground;
  self.physicsBody?.contactTestBitMask = PhysicsCategory.Ground;
}

定义跳转功能

func jump() {
  print("in jump function");

  let jumping = jumpPrep();
  self.run(jumping, withKey: "jumpKey");

  self.physicsBody?.velocity = CGVector(dx: 0, dy: 0);
  self.physicsBody?.applyImpulse(CGVector(dx: 0, dy: 200));
}

我创建了在跳转功能中调用的动画

func jumpPrep() -> SKAction {
  var jumpSequence = [SKTexture]();

  for i in 1...2 {
    let imageName = "jumpup\(i)";
    jumpSequence.append(SKTexture(imageNamed: imageName));
  }

  for i in 1...2 {
    let imageName = "jumpfall\(i)";
    jumpSequence.append(SKTexture(imageNamed: imageName));
  }

  let jump = SKAction.animate(with: jumpSequence, timePerFrame: TimeInterval(0.18), resize: true, restore: true);

  return jump;
}

使用Swift / SpriteKit的.applyImpulse角色不会跳

0 个答案: