斯威夫特/ XCode中生成错误：无法将类型的价值[模具]预期参数类型[模具]

Question

使用的XCode 8.3.3，我相信使用雨燕3.1，但不是100％确定（你怎么知道？）。这是完整的代码。请注意，当我把它粘贴到一个干净的游乐场时，我没有任何错误。但是，一个XCode项目中，我得到就行生成错误“让骰子=骰子（withArrayOfDie：arrayOfDie）”中的单元测试：

let defaultFaceCount = 6 
let defaultDieCount = 6 

func randomInt(withMaxValue maxValue: Int) -> Int { 
    return Int(arc4random_uniform(UInt32(maxValue))) + 1 
} 

class Die 
{ 
    private let m_faceCount: Int  // Constant only set in init 
    private var m_faceValue: Int? 

    init(numFaces initialFaceCount: Int, withValue initialFaceValue: Int) { 
     // Make sure number of faces is greater than 0. 
     m_faceCount = (initialFaceCount > 0) ? initialFaceCount : defaultFaceCount 

     // Make sure face value is in proper range. 
     if initialFaceValue == 0 || initialFaceValue > m_faceCount { 
      m_faceValue = randomInt(withMaxValue: m_faceCount) 
     } 
     else { 
      m_faceValue = abs(initialFaceValue) 
     } 
    } 

    convenience init(numFaces initialFaceCount: Int) { 
     self.init(numFaces: initialFaceCount, 
        withValue: randomInt(withMaxValue: initialFaceCount)) 
    } 

    convenience init() { 
     self.init(numFaces: defaultFaceCount) 
    } 

    var faceValue: Int { 
     get { 
      return m_faceValue! 
     } 
    } 

    var faceCount: Int { 
     get { 
      return m_faceCount 
     } 
    } 

    func roll() { 
     // face values are 1 based! 
     m_faceValue = randomInt(withMaxValue: m_faceCount) 
    } 
} 

class Dice { 
    var m_dice: [Die] 
    var m_occurrencesOf: [Int] 

    // Init with a pre-initialized array of Die. Every Die in 
    // the array must have the same face count. 
    init(withArrayOfDie: [Die]) { 
     var faceCount = defaultFaceCount 
     if withArrayOfDie.isEmpty { 
      // If there are no dice, add defaults. 
      m_dice = [Die]() 
      for _ in 1...defaultDieCount { 
       m_dice.append(Die(numFaces: defaultFaceCount)) 
      } 
     } 
     else { 
      m_dice = withArrayOfDie 
      faceCount = m_dice[0].faceCount 
     } 
     // Keep trace of # of occurrences of each face value. 
     m_occurrencesOf = Array(repeating: 0, count: faceCount) 
     for die in m_dice { 
      m_occurrencesOf[die.faceValue - 1] += 1 
     } 
    } 

    // Init numDice dice, each with numFaces. 
    convenience init(numDice count: Int, numFaces faceCount: Int) { 
     var dice = [Die]() 
     for _ in 1...count { 
      dice.append(Die(numFaces: faceCount)) 
     } 
     self.init(withArrayOfDie: dice) 
    } 

    // Init defaultDieCount dice, each with defaultFaceCount faces. 
    convenience init() { 
     self.init(numDice: defaultDieCount, numFaces: defaultFaceCount) 
    } 

    var count: Int { 
     return m_dice.count 
    } 

    // Retrieve the die at the specified (0 based) index. 
    func die(atIndex index: Int) -> Die? { 
     if !m_dice.isEmpty && index >= 0 && index < m_dice.count { 
      return m_dice[index] 
     } 
     return nil 
    } 

    subscript(index: Int) -> Die? { 
     get { 
      return die(atIndex: index) 
     } 
    } 
} 

// Unit Test 
var arrayOfDie = [Die]() 
for i in 1...6 { 
    arrayOfDie.append(Die()) 
} 
let dice = Dice(withArrayOfDie: arrayOfDie) 
// XCTAssertEqual(6, dice.count) 

我得到的编译错误“无法将类型的值模]设定为“上线‘预期参数类型[模具]让骰子=骰子（withArrayOfDie：arrayOfDie）’。无法弄清为什么作为die数组的参数与预期的init参数类型不匹配。

谢谢！

Answer 1

得到var m_dice: [Die]()

class Dice { 
    var m_dice: [Die] 
    init(withArrayOfDie dice: [Die]) { 
     m_dice = dice 
    } 
}