ios - 如何根据 UISwitch 状态更改 ImageView 图像

Question

我的代码成功构建，但显示错误:

2017-01-25 14:05:06.645 project 4[2500:109254] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[ setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key imagechg.

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var myImageView: UIImageView!
    @IBOutlet weak var switchController: UISwitch!

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

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

    @IBAction func segmentChanged(_ sender: UISegmentedControl) {
        print(sender.selectedSegmentIndex)
    }

    @IBAction func switchimgchng(_ sender: UISwitch) {
        if switchController.isOn == true {
            myImageView.image = UIImage(named: "appleBlack.png")
        }
    }
}

Answer 1

您之前可能已将 imageview 连接到不同的 IBOutlet 并在您的类中重命名它。删除 Storyboard 中的 socket 连接并重新链接。