如何在Swift中为UIImageView对象分配一个动作

7 回答

• 12

  你需要 UITapGestureRecognizer . 要设置使用此：

  override func viewDidLoad()
  {
      super.viewDidLoad()
  
      let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(imageTapped(tapGestureRecognizer:)))
      imageView.isUserInteractionEnabled = true
      imageView.addGestureRecognizer(tapGestureRecognizer)
  }
  
  func imageTapped(tapGestureRecognizer: UITapGestureRecognizer)
  {
      let tappedImage = tapGestureRecognizer.view as! UIImageView
  
      // Your action
  }
  

  （您也可以使用UIButton并为其分配图像，没有文本，只需连接IBAction）

  回复于 2024-04-25T12:19:03+08:00
• 30

  您需要添加一个手势识别器（用于点击使用UITapGestureRecognizer，用于点按并按住UILongPressGestureRecognizer）到您的 UIImageView .

  let tap = UITapGestureRecognizer(target: self, action: #selector(YourClass.tappedMe))
  imageView.addGestureRecognizer(tap)
  imageView.isUserInteractionEnabled = true
  

  并实现选择器方法，如：

  @objc func tappedMe()
  {
      println("Tapped on Image")
  }
  

  回复于 2024-04-25T12:19:03+08:00
• 7

  您可以将 UITapGestureRecognizer 添加到imageView，只需将一个拖到Storyboard / xib中，然后从imageView拖动到gestureRecognizer，然后按Ctrl-拖动从gestureRecognizer到Swift文件即可生成 IBAction .

  您还需要在 UIImageView 上启用用户交互，如下图所示：
  

  回复于 2024-04-25T12:19:03+08:00
• 1

  对于swift 2.0及以上版本，请执行此操作

  @IBOutlet weak var imageView: UIImageView!
      override func viewDidLoad() {
          super.viewDidLoad()
          // Do any additional setup after loading the view, typically from a nib.
          let tap = UITapGestureRecognizer(target: self, action: #selector(ViewController.tappedMe))
          imageView.addGestureRecognizer(tap)
          imageView.userInteractionEnabled = true
      }
      func tappedMe()
      {
          print("Tapped on Image")
      }
  

  回复于 2024-04-25T12:19:03+08:00
• 319

  实际上你可以将 UIButton 的图像设置为通常放在 UIImageView 中的图像 . 例如，你会做什么：

  myImageView.image = myUIImage
  

  你可以改为使用：

  myButton.setImage(myUIImage, forState: UIControlState.Normal)
  

  那么，这就是你的代码的样子：

  override func viewDidLoad(){
    super.viewDidLoad()
  
    var myUIImage: UIImage //set the UIImage here
    myButton.setImage(myUIImage, forState: UIControlState.Normal)
  }
  
  @IBOutlet var myButton: UIButton!
  @IBAction func buttonTap(sender: UIButton!){
    //handle the image tap
  }
  

  使用此方法的好处是，如果必须从数据库加载图像，则可以在设置图像之前设置按钮的 Headers ：

  myButton.setTitle("Loading Image...", forState: UIControlState.Normal)
  

  告诉您的用户您正在加载图片

  回复于 2024-04-25T12:19:03+08:00
• 54

  您可以在 UIImageView 的顶部放置一个透明背景的 UIButton ，并在加载图像之前先点按按钮

  回复于 2024-04-25T12:19:03+08:00
• 0

  Swift 4 Code

  ---

  步骤1在ViewdidLoad（）中

  let pictureTap = UITapGestureRecognizer(target: self, action: #selector(MyInfoTableViewController.imageTapped))
         userImageView.addGestureRecognizer(pictureTap)
         userImageView.isUserInteractionEnabled = true
  

  步骤2添加以下功能

  @objc func imageTapped() {
  
          let imageView = userImageView
          let newImageView = UIImageView(image: imageView?.image)
          newImageView.frame = UIScreen.main.bounds
          newImageView.backgroundColor = UIColor.black
          newImageView.contentMode = .scaleAspectFit
          newImageView.isUserInteractionEnabled = true
          let tap = UITapGestureRecognizer(target: self, action: #selector(dismissFullscreenImage))
          newImageView.addGestureRecognizer(tap)
          self.view.addSubview(newImageView)
  
          self.navigationController?.isNavigationBarHidden = true
          self.tabBarController?.tabBar.isHidden = true
  
      }
  

  经过测试和正常工作

  回复于 2024-04-25T12:19:03+08:00