单击图像时如何添加操作？ [复制]

Question

我正在尝试在我的应用中使用自定义图像作为按钮。如何为图像添加操作？

这适用于 iOS 应用程序，我不想将默认文本按钮用作按钮。我已经尝试控制+拖动图像到 ViewController 但没有“操作”选项。

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.

    let designChoice = designPrac.randomElement()
    let forChoice = forWhatPrac.randomElement()
    let helpChoice = toHelpPrac.randomElement()

    designLabel.text = designChoice
    forLabel.text = forChoice
    helpLabel.text = helpChoice
}

这是我在应用启动时必须运行的代码，但我找不到在单击图像按钮时让它工作的方法。

Answer 1

为了给UIImageView添加一个动作，你需要给它添加一个UITapGestureRecognizer，你可以这样做：

<#YourImageView#>.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(self.handleImageTap)))

然后你可以使用选择器来处理点击：

@objc func handleImageTap() {
    // handle image tap here    
}

Answer 2

您可以为此目的使用 addGestureRecognizer：

let imageView = UIImageView()
//add necessary code 
imageView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(MethodForAction)))

Answer 3

根据How do you make an UIImageView on the storyboard clickable (swift)：

class ViewController: UIViewController {

@IBOutlet weak var imageView: UIImageView!
override func viewDidLoad() {
    super.viewDidLoad()
    // create tap gesture recognizer
    let tapGesture = UITapGestureRecognizer(target: self, action: #selector(ViewController.imageTapped(gesture:)))

    // add it to the image view;
    imageView.addGestureRecognizer(tapGesture)
    // make sure imageView can be interacted with by user
    imageView.isUserInteractionEnabled = true
}

func imageTapped(gesture: UIGestureRecognizer) {
    // if the tapped view is a UIImageView then set it to imageview
    if (gesture.view as? UIImageView) != nil {
        print("Image Tapped")
        //Here you can initiate your new ViewController

    }
}