ios - 在 Swift 3 中使用未解析的标识符进行数据存储

Question

帮助解决这个 swift 3 错误。我们正试图以某种方式存储每个短语中的字符数，在本例中，根据来自 https://www.raywenderlich.com/77981/make-letter-word-game-uikit-swift-part-1 的来源将其存储为 anagram1length 和 anagram2length。 .这里需要注意的是 swift 3 中的以下两行代码让我们错误地使用了未解析的标识符“count”:

let anagram1length = count(anagram1)
let anagram2length = count(anagram2)

来自以下函数:

  func dealRandomAnagram () {
    //1
    assert(level.anagrams.count > 0, "no level loaded")

    //2
    let randomIndex = randomNumber(minX:0, maxX:UInt32(level.anagrams.count-1))
    let anagramPair = level.anagrams[randomIndex]

    //3
    let anagram1 = anagramPair[0] as! String
    let anagram2 = anagramPair[1] as! String

    //4
    let anagram1length = count(anagram1)
    let anagram2length = count(anagram2)

    //5
    print("phrase1[\(anagram1length)]: \(anagram1)")
    print("phrase2[\(anagram2length)]: \(anagram2)")

    //calculate the tile size
    let tileSide = ceil(ScreenWidth * 0.9 / CGFloat(max(anagram1length, anagram2length))) - TileMargin

    //get the left margin for first tile
    var xOffset = (ScreenWidth - CGFloat(max(anagram1length, anagram2length)) * (tileSide + TileMargin)) / 2.0

    //adjust for tile center (instead of the tile's origin)
    xOffset += tileSide / 2.0

    //initialize target list
    targets = []

    //create targets
    for (index, letter) in anagram2length.enumerate(anagram2) {
      if letter != " " {
        let target = TargetView(letter: letter, sideLength: tileSide)
        target.center = CGPointMake(xOffset + CGFloat(index)*(tileSide + TileMargin), ScreenHeight/4)

        gameView.addSubview(target)
        targets.append(target)
      }
    }

Answer 1

该教程显然是用旧的 Swift 版本编写的。

在当前的 Swift 3 版本中通常是这样

let anagram1length = anagram1.characters.count
let anagram2length = anagram2.characters.count