在 Swift 中显示/隐藏图像

Question

如何通过点击按钮显示或隐藏 Swift 中的图像？例如：

我有 ImageA 和 ImageB 以及一个我想用来将 ImageA 移动到 ImageB 再回到 ImageA 等的按钮..

从 ImageA 移动到 ImageB 效果很好，但我怎样才能移动回 ImageA？

我的代码是：

import UIKit

class ViewController: UIViewController {

@IBOutlet weak var Bild1: UIImageView!
@IBOutlet weak var Bild2: UIImageView!

@IBAction func pressedButton(sender: AnyObject) {

    Bild1.hidden = true
    Bild2.hidden = false
}


override func viewDidLoad() {
    super.viewDidLoad()

    Bild1.hidden = false
    Bild2.hidden = true

    // 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

尝试替换为：

@IBAction func pressedButton(sender: AnyObject) {
    if Bild1.hidden {
        Bild1.hidden = false
        Bild2.hidden = true
    } else {
        Bild1.hidden = true
        Bild2.hidden = false
    } 
}

Answer 2

@IBAction func pressedButton(sender: AnyObject) {

    Bild1.hidden = !Bild1.hidden
    Bild2.hidden = !Bild2.hidden
}

Answer 3

override func viewDidLoad()
{
    super.viewDidLoad()

    Bild1.isHidden = false
    Bild2.isHidden = true
    // Do any additional setup after loading the view, typically from a nib.
}

@IBAction func pressedButton(sender: AnyObject) 
{
    Bild1.isHidden = !Bild1.isHidden
    Bild2.isHidden = !Bild2.isHidden
}

Answer 4

@IBAction func pressedButton(sender: AnyObject) {

    Bild1.isHidden = !Bild1.isHidden
    Bild2.isHidden = !Bild2.isHidden
}

这将在显示和隐藏之间切换图像属性。兼容 Swift 4 的语法

在 Swift 中显示/隐藏图像

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