从另一个文件快速访问variables

我是一个新手快速程序员，我被要求写一个应用程序，允许你input一个单词，然后生成一个随机的Haiku这是一个带有两个ViewControllers的选项卡式应用程序。 （诗）的基础上，这个词。 所以在FirstViewController中我有数据，而且我想在SecondViewController中以很好的方式显示那些数据。 我有FirstViewController中的所有诗行，但我想在SecondViewController中访问这些variables。 我试图创build一个函数，只是返回它们，然后在SecondViewController调用该函数，但没有任何结果，因为函数只是返回零。 如果有人能帮忙，会很高兴谢谢！

这是FirstViewController：

import UIKit import Foundation class FirstViewController: UIViewController, UITextFieldDelegate { @IBOutlet weak var keyWordTextField: UITextField! @IBOutlet weak var syllableSlider: UISlider! @IBOutlet weak var syllableSliderLabel: UILabel! var syllableSliderValue = 1 @IBOutlet weak var lineOneTextField: UITextField! @IBOutlet weak var lineTwoTextField: UITextField! @IBOutlet weak var lineThreeTextField: UITextField! override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view, typically from a nib. lineOneTextField.text = "Rad 1" lineTwoTextField.text = "Rad 2" lineThreeTextField.text = "Rad 3" } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } @IBAction func syllableValueChanged(sender: UISlider) { syllableSliderValue = Int((sender.value)) syllableSliderLabel.text = "Ordet har: \(syllableSliderValue) stavelser" } @IBAction func getNewHaiku() { if keyWordTextField.text != "" { let keyWord = keyWordTextField.text let lineOne = generateLine(keyWord: keyWord, syllables: syllableSliderValue, lineSyllableLenght: 5) let lineTwo = generateLine(keyWord: keyWord, syllables: syllableSliderValue, lineSyllableLenght: 7) let lineThree = generateLine(keyWord: keyWord, syllables: syllableSliderValue, lineSyllableLenght: 5) lineOneTextField.text! = lineOne lineTwoTextField.text! = lineTwo lineThreeTextField.text! = lineThree } } func generateLine(#keyWord: String, syllables : Int, lineSyllableLenght : Int) -> String { let oneSyllables = Dict().oneSyllables let twoSyllables = Dict().twoSyllables let threeSyllables = Dict().threeSyllables let fourSyllables = Dict().fourSyllables let randomOneSyllableWordNumber = Int(arc4random_uniform(UInt32(oneSyllables.count))) let randomTwoSyllableWordNumber = Int(arc4random_uniform(UInt32(twoSyllables.count))) let randomThreeSyllableWordNumber = Int(arc4random_uniform(UInt32(threeSyllables.count))) let randomFourSyllableWordNumber = Int(arc4random_uniform(UInt32(fourSyllables.count))) var lineArray : [String] = [] var line = "" lineArray.append(keyWord) if syllables == 1 { let randomWordMethod = Int(arc4random_uniform(2)) if randomWordMethod == 0 { lineArray.append(fourSyllables[randomFourSyllableWordNumber]) } else if randomWordMethod == 1 { lineArray.append(threeSyllables[randomThreeSyllableWordNumber]) lineArray.append(oneSyllables[randomOneSyllableWordNumber]) } else if randomWordMethod == 2 { lineArray.append(oneSyllables[randomOneSyllableWordNumber]) lineArray.append(twoSyllables[randomOneSyllableWordNumber]) lineArray.append(oneSyllables[randomOneSyllableWordNumber]) } } else if syllables == 2 { let randomWordMethod = Int(arc4random_uniform(2)) if randomWordMethod == 0 { lineArray.append(twoSyllables[randomOneSyllableWordNumber]) lineArray.append(oneSyllables[randomTwoSyllableWordNumber]) } else if randomWordMethod == 1 { lineArray.append(threeSyllables[randomThreeSyllableWordNumber]) } else if randomWordMethod == 2 { lineArray.append(twoSyllables[randomTwoSyllableWordNumber]) lineArray.append(oneSyllables[randomOneSyllableWordNumber]) } } else if syllables == 3 { let randomWordMethod = Int(arc4random_uniform(1)) if randomWordMethod == 0 { lineArray.append(twoSyllables[randomTwoSyllableWordNumber]) } else if randomWordMethod == 1 { lineArray.append(oneSyllables[randomOneSyllableWordNumber]) lineArray.append(oneSyllables[randomOneSyllableWordNumber]) } } else if syllables == 4 { lineArray.append(oneSyllables[randomOneSyllableWordNumber]) } if lineSyllableLenght == 7 { let randomWordMethod = Int(arc4random_uniform(1)) if randomWordMethod == 0 { lineArray.append(oneSyllables[randomOneSyllableWordNumber]) lineArray.append(oneSyllables[randomOneSyllableWordNumber]) } else if randomWordMethod == 1 { lineArray.append(twoSyllables[randomTwoSyllableWordNumber]) } } for word in lineArray { line += " \(word)" } line += "," return line } override func touchesBegan(touches: NSSet, withEvent event: UIEvent) { self.view.endEditing(true) } func getData() -> (line2: String, line3: String) { return (lineTwoTextField.text, lineThreeTextField.text) } } 

Ps，“Dict”是另一个文件，但只包含文字。

第二个视图控制器只是空白。

Answer 1

你需要在第二个视图控制器中传递这样的实例：

 var firstViewController: FirstViewController? 

然后在知道两者的主实例中：

 secondViewController.firstViewController = firstViewController 

（例如在awakeFromNib ）假设它们在主实例中是已知的

 let firstViewController = FirstViewController() let secondViewController = SecondViewController() 

最后在SecondViewController中可以访问第一个：

 firstViewController?.generateLine....