swift编程中点击的图像区域坐标

Question

我是 Swift 应用程序开发的新手，我想知道如何根据使用 Swift 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

您需要在图像视图上使用点击手势识别器，您还需要将用户交互设置为启用属性。然后你可以从手势识别器的方法中得到点。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
}


}

Answer 2

2017 年更新：

现在 Selector(String) 已弃用。可以使用新语法 #selector.

此外，不需要末尾的冒号。

let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(tapAction))

swift编程中点击的图像区域坐标

Coordinates of image area tapped in swift programming

swift

ios9

xcode7