如何在swift按钮上更改uiimage的图像？ [英] how to change uiimage's image on button click in swift?

问题描述

我正在尝试通过单击swift中的按钮来更改包含图像的uiimage控件。为此，我写了一个简单的猜猜我有多少手指应用程序。我已经阅读了一些stackoverflow文章，但无法解决问题。下面你可以看到我的代码和我的ui。如何在点击时更改更改图像？

I'm trying change an uiimage control's containing image by clicking a button in swift. For this, i wrote a simple a "guess how many fingers i'm holding up" app. I've read some stackoverflow articles but couldn't solve the problem. Below you can see my code and my ui. How can i change change image on click?

这是我的代码：

import UIKit

class ViewController: UIViewController {

    @IBOutlet var myImageView: UIImageView!
    @IBOutlet var inputField: UITextField!
    @IBAction func clickedGuessButtonAction(sender: AnyObject) {
        println("Guess button clicked")
        var randomX = Int(arc4random()%6)
        println("randomX = \(randomX)")
        var guess = inputField.text.toInt();

        let image0 = UIImage(named: "images/qm.jpg")
        let image1 = UIImage(named: "images/tick.jpg")
        let image2 = UIImage(named: "images/cross.jpg")

        if((inputField.text) != nil){
            if(guess == randomX){
                println("correct")
                myImageView.image=UIImage(named: "tick.jpg") // THIS IS NOT WORKING
                myImageView.image=image1                     // THIS IS NOT WORKING TOO
                inputField.resignFirstResponder();// hides keyboard
            }
            else
            {
                println("wrong")
                myImageView.image=UIImage(named: "cross.jpg")
                inputField.resignFirstResponder();//hides keyboard
            }
        }
        else{
            println("invalid input. requires integer only")
            inputField.resignFirstResponder();// hides keyboard
        }
    }

    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.
    }


}

这是我的用户界面：

推荐答案

您无需指定资产目录的名称或图像文件的扩展名。尝试删除它们。例如，

You don't need to specify either the asset catalog's name or the image file's extension. Try removing those. For example,

myImageView.image = UIImage(named: "tick")

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