使用變量viewDidLoad

Question

標籤etikett1確實輸出變量test1的值，但標籤etikett2不起作用。我如何獲得在viewDidLoad中聲明的變量test2的值？

import UIKit 

class ViewController: UIViewController { 
    @IBOutlet weak var etikett1: UILabel! 
    @IBOutlet weak var etikett2: UILabel! 

    @IBAction func button(sender: UIButton) { 
     let test1 = "hello 1" 
     etikett1.text = test1   
     etikett2.text = test2        
    } 

    override func viewDidLoad() { 
     super.viewDidLoad() 
     let test2 = "hello 2" 
    } 
} 

Answer 1

您需要任何聲明test2作爲一個實例變量，旁邊的兩個標籤，或分配的etikket2內viewDidLoad的text屬性：

方法1：

class ViewController: UIViewController { 
    @IBOutlet weak var etikett1: UILabel! 
    @IBOutlet weak var etikett2: UILabel! 
    let test2 = "hello 2" 

    @IBAction func button(sender: UIButton) { 
     let test1 = "hello 1" 
     etikett1.text = test1   
     etikett2.text = test2        
    } 

    override func viewDidLoad() { 
     super.viewDidLoad() 
    } 
} 

方法2：

override func viewDidLoad() { 
    super.viewDidLoad() 
    let test2 = "hello 2" 
    etikett2.text = test2 
}