'CGFloat'不可转换为'浮动'等更多

Question

我的应用程序中存在更多问题。我的错误是正如标题所示：

1. Swift编译器错误。

ERROR1： 'CGFloat的' 是无法转换为 '浮动'

代码为第1和第2个错误：

self.setPositionRelativeBot(pipeBot, x: xx, y: offset) 
self.setPositionRelativeTop(pipeTop, x: xx, y: offset + space) 

这里是整个FUNC：

func spawnPipeRow(offs: Float) 
    { 
     let offset = offs - space/2 

     let pipeBot = mainPipe.copy() as Pipe 
     let pipeTop = mainPipe.copy() as Pipe 

     pipeBot.texture = SKTexture(imageNamed: "BotPipe") 
     pipeTop.texture = SKTexture(imageNamed: "TopPipe") 

     pipeBot.texture!.filteringMode = SKTextureFilteringMode.Nearest 
     pipeTop.texture!.filteringMode = SKTextureFilteringMode.Nearest 

     pipeBot.isBottom = true 

     let xx = self.view!.bounds.size.width 

     self.setPositionRelativeBot(pipeBot, x: xx, y: offset) 
     self.setPositionRelativeTop(pipeTop, x: xx, y: offset + space) 

     pipeBot.physicsBody = SKPhysicsBody(rectangleOfSize: pipeBot.size) 
     pipeTop.physicsBody = SKPhysicsBody(rectangleOfSize: pipeTop.size) 

     pipeBot.physicsBody!.dynamic = false 
     pipeTop.physicsBody!.dynamic = false 

     pipeBot.physicsBody!.contactTestBitMask = birdCategory 
     pipeTop.physicsBody!.contactTestBitMask = birdCategory 

     pipeBot.physicsBody!.collisionBitMask = birdCategory 
     pipeTop.physicsBody!.collisionBitMask = birdCategory 

     pipes.append(pipeBot) 
     pipes.append(pipeTop) 

     self.addChild(pipeBot) 
     self.addChild(pipeTop) 
    } 

---

1. Swift编译器错误。

ERROR1： '浮动' 不等同于 'UINT8'

代码为第1错误：

vel -= 85 - (self.view!.bounds.size.height - bird.position.y) 

误差2： '？SKPhysicsBody' 不具有名为构件 '速度'

代码的第二错误：

bird.physicsBody.velocity = CGVectorMake(0, vel) 

这里是整个FUNC：

override func touchesBegan(touches: NSSet, withEvent event: UIEvent) 
    { 
     if (!bird.physicsBody!.dynamic) 
     { 
      //First touch 

      self.spawnPipeRow(0) 

      bird.physicsBody!.dynamic = true 

      bird.physicsBody!.velocity = CGVectorMake(0, 175) 

      scoreLabel.hidden = false 

      isMoving = true 
     } else if (isMoving) 
     { 
      var vel: Float = 200 

      if (self.view!.bounds.size.height - bird.position.y < 85) 
      { 
       vel -= 85 - (self.view!.bounds.size.height - bird.position.y) 
      } 

      bird.physicsBody.velocity = CGVectorMake(0, vel) 
     } else 
     { 
      overlay.removeFromParent() 

      for pi in pipes 
      { 
       pi.removeFromParent() 
      } 

      pipes.removeAll(keepCapacity: false) 

      score = 0 

      bird.physicsBody!.dynamic = false 
      bird.position = CGPoint(x: 150, y: view!.bounds.size.height/2 - 10) 

      scoreLabel.hidden = true 

      isGroundMoving = true 
     } 
    } 

---

Swift编译器错误。

ERROR1： 'CGFloat的' 不等于 'UINT8'

代码的第一和第二误差（同样的错误都行）：

ground1.position.x -= movingSpeed 
ground2.position.x -= movingSpeed 

误差2： 不能调用' - ='带有类型参数列表'（@lvalue CGFloat，$ T9）'

代码为第三和第四个错误（相同错误两行）：

background1.position.x -= movingSpeed/3 
background2.position.x -= movingSpeed/3 

误差3： 'CGFloat的' 不等同于 'UINT8'

pipe.position.x -= movingSpeed 

这里是整个FUNC：

override func update(currentTime: CFTimeInterval) 
    { 
     if (isGroundMoving) 
     { 
      ground1.position.x -= movingSpeed 
      ground2.position.x -= movingSpeed 

      if (ground1.position.x <= -self.view!.bounds.size.width/2) 
      { 
       ground1.position.x = self.view!.bounds.size.width * 1.5 - 2 
      } 

      if (ground2.position.x <= -self.view!.bounds.size.width/2) 
      { 
       ground2.position.x = self.view!.bounds.size.width * 1.5 - 2 
      } 

      background1.position.x -= movingSpeed/3 
      background2.position.x -= movingSpeed/3 

      if (background1.position.x <= -self.view!.bounds.size.width/2) 
      { 
       background1.position.x = self.view!.bounds.size.width * 1.5 - 2 
      } 

      if (background2.position.x <= -self.view!.bounds.size.width/2) 
      { 
       background2.position.x = self.view!.bounds.size.width * 1.5 - 2 
      } 

      if (isMoving) 
      { 
       for (var i = 0; i < pipes.count; i++) 
       { 
        let pipe = pipes[i] 

        if (pipe.position.x + (pipe.size.width/2) < 0) 
        { 
         pipe.removeFromParent() 

         continue 
        } 

        if (pipe.position.x + (pipe.size.width/2) < self.view!.bounds.size.width/2 && pipe.isBottom && !pipe.pointAdded) 
        { 
         score++ 

         pipe.pointAdded = true 
        } 

        pipe.position.x -= movingSpeed 

        if (i == pipes.count - 1) 
        { 
         if (pipe.position.x < self.view!.bounds.width - pipe.size.width * 2.0) 
         { 
          self.spawnPipeRow(self.randomOffset()) 
         } 
        } 
       } 

       scoreLabel.text = "Score: \(score)" 
      } 
     } 
    } 

---

我希望有你们的可以算因为我不能:)

Answer 1

错误1：使用CGFloat而不是的Float。例如：

var vel: CGFloat = 200 

错误2：physicsBody是一个可选的（可以为空），所以使用?.操作引用之前有条件地解开它的velocity：

bird.physicsBody?.velocity = CGVectorMake(0, vel) 

所有你的错误似乎是由这两个问题之一引起的。例如，spawnPipeRow的论点再次是offs: Float而不是CGFloat。我怀疑您提供的代码段中未声明的值也是如此，例如space或movingSpeed。

要了解什么是CGFloat，它命令点击 - 这将带你到CoreGraphics API，你可以阅读CGFloat是“原生型......这是对32位架构，双浮在64-位体系结构“。

此外，当修改physicsBody时，我倾向于使用?而不是!，因为如果physicsBody为零，后者将会崩溃。