swift - 快速编程中点击的图像区域的坐标

Question

我是 Swift 应用开发新手，我想知道如何使用 Swift 根据单击 Image 的位置添加触摸事件。我需要获取图像被点击区域的坐标。

Answer 1

您需要在 ImageView 上使用点击手势识别器，还需要将用户交互属性设置为启用。然后你可以从手势识别器的方法中得到要点。这是一些快速代码:

import UIKit

class ViewController: UIViewController {

@IBOutlet weak var imageView: UIImageView!

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


    let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: Selector("tapAction:"))

    self.imageView.userInteractionEnabled = true
    self.imageView.addGestureRecognizer(tapGestureRecognizer)
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

func tapAction(sender: UITapGestureRecognizer) {

    let touchPoint = sender.locationInView(self.imageView) // Change to whatever view you want the point for
}


}