ios - Swift - 在 vi​​ewDidLoad() 之外声明变量的替代方法

Question

我正在尝试初始化一个要在整个程序中使用的变量，但您将如何在 viewDidLoad() 函数之外执行此操作。

目前，变量“wordToUse”在 viewDidLoad() 函数中声明，但我无法在程序的其他地方访问它以与按下按钮时进行比较，所以如何声明它以便它可以初始化一次该程序已启动，然后在整个程序中使用？

这是我的代码:

import UIKit

class ViewController: UIViewController {

@IBOutlet weak var wordLabel: UILabel!
@IBOutlet weak var lettersUsed: UILabel!

var lives = 5

var wordList = ["Watch", "Phone", "Apple", "Technology", "Swift", "Computing", "Software", "Hardware", "Computers", "Processor", "Swift", "Java", "Python", "Programming", "Development", "Microsoft", "DropBox", "Facebook"]


var wordToUse: String {
    println(wordList[Int(arc4random_uniform(18))])
    return wordList[Int(arc4random_uniform(18))]
}



override func viewDidLoad() {
    super.viewDidLoad()

    var wordToUseList = Array(wordToUse)


    for var index = 0; index != wordToUseList.count; ++index {
        wordToUseList[index] = "*"
    }

    wordLabel.text = String(wordToUseList)
    println(wordToUseList)
    livesText.text = String(lives)
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()

}

Answer 1

你想要一个全局变量。所以你只需在类声明之外声明它:

var wordList = ["Watch", "Phone", "Apple", "Technology", "Swift", "Computing", "Software", "Hardware", "Computers", "Processor", "Swift", "Java", "Python", "Programming", "Development", "Microsoft", "DropBox", "Facebook"]


var wordToUse: String {
    println(wordList[Int(arc4random_uniform(18))])
    return wordList[Int(arc4random_uniform(18))]
}

class ViewController: UIViewController {
     ...
}