Question

标题本身解释尽可能多。基本上，我有一个分段控件，我想在每个段被选中后更改我的图像视图中的图像，但我似乎无法应用或找到解决我的问题的逻辑。答案本身可能非常简单，但我对Swift来说真的很新，并且无法在任何地方找到答案，所以我希望能解决我的问题。谢谢！

@IBOutlet weak var newImageView: UIImageView!

@IBAction func chooseImage(sender: AnyObject) {
    if myPhotoSegment.selectedSegmentIndex == 0
    {

        newImageView = UIImage(named: "3.jpg")


    }


    if myPhotoSegment.selectedSegmentIndex == 1
    {


    }

Answer 1

您无法将UIImageView的值设置为UIImage。改为设置newImageView.image的值。这也是switch语句的好机会。

@IBAction func chooseImage(sender: AnyObject) {
    switch myPhotoSegment.selectedSegmentIndex {
    case 0:
      newImageView.image = UIImage(named: "3.jpg")
    case 1:
      newImageView.image = UIImage(named: "4.jpg")
    default:
      newImageView.image = nil
    }
}

Answer 2

在swift4中在imageview中使用图像进行细分

@IBOutlet weak var bgimage: UIImageView!


override func viewDidLoad() {
    super.viewDidLoad()
   
    self.view.backgroundColor = UIColor.red
    
    let itemsimg = ["google", "facebook", "instagram" , "twitter"]
    let customSI = UISegmentedControl(items: itemsimg)
    customSI.selectedSegmentIndex = 0
    
    customSI.frame = CGRect(x:50, y:100, width:300, height: 40)
    
    customSI.layer.cornerRadius = 5.0
    customSI.backgroundColor = UIColor.black
    customSI.tintColor = UIColor.white
    
    customSI.addTarget(self, action: #selector(changeimg),for: .valueChanged)
    
    self.view.addSubview(customSI)
}

@objc func changeimg(sender: UISegmentedControl) {
    switch sender.selectedSegmentIndex {
    case 1:
        bgimage.image = UIImage(named: "facebook")
    case 2:
        bgimage.image = UIImage(named: "instagram")
    case 3:
        bgimage.image = UIImage(named: "twitter")
    default:
        bgimage.image = UIImage(named: "google")
    }
}

}

Swift - 通过分段控制更改图像视图背景图像

2 个答案: