swift - 访问其他 View Controller 中的变量 - swift

Question

我想访问第二个 View Controller 中的变量answerdata。我对 swift 很陌生，我尝试了很多选择，但没有任何效果。

第一个 View Controller 中的代码:

import UIKit

class prvnidotaz: UIViewController {

var pickerdata = ["Small","Big","Medium"]


    func numberOfComponentsInPickerView(pickerView: UIPickerView!) ->Int
    {
        return 1
    }

    func pickerView(pickerView: UIPickerView!, numberOfRowsInComponent component: Int) ->Int {
        return pickerdata.count
    }


    func pickerView(pickerView: UIPickerView!, titleForRow row: Int, forComponent component: Int)->String!{
        return pickerdata [row]
    }

    func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
      var answerdata = pickerdata [row]
        println(answerdata)
    }



    override func viewDidLoad() {
        super.viewDidLoad()


        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

Answer 1

您的 var answerdata 被定义为局部变量。

如果将答案数据定义为实例变量(也称为“属性”)，则可以从第二个 Controller 访问答案数据。