@IBOutlet weak var imageView: UIImageView!

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
//ViewController is your current view controller    
let tap = UITapGestureRecognizer(target: self, action: #selector(ViewController.tappedMe))
    imageView.addGestureRecognizer(tap)
    imageView.isUserInteractionEnabled = true
}

// Need to ass objective-c annotation 
@objc
func tappedMe() {
    print("Tapped on Image")
}

Swift 4代码

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“Following”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

    }

它已经过测试，工作正常

斯威夫特这样做:

@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.isUserInteractionEnabled = true
}

func tappedMe() {
    print("Tapped on Image")
}

需要添加懒TapGestureRecognizer注册 因为“self”在UITapGestureRecognizer(目标:self…)将是nil如果它不是一个惰性变量。即使你设置isUserInteractionEnable = true，它不会注册没有惰性变量。

lazy var imageSelector : UIImageView = {
    let image = UIImageView(image: "imageName.png")
    //now add tap gesture
    image.isUserInteractionEnabled = true
    image.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(handleImageSelector)))
    return image
}()
@objc private func handleImageSelector() {
    print("Pressed image selector")
}

你可以在UIImageView上面放一个带有透明背景的UIButton，并在加载图像之前监听按钮上的点击

你可以添加一个UITapGestureRecognizer到imageView中，只需将一个拖到你的Storyboard/xib中，从imageView中按住ctrl拖动到gestureRecognizer中，再从gestureRecognizer中按住ctrl拖动到swift文件中，即可生成IBAction。

你还需要在UIImageView上启用用户交互，如下图所示: