swift - 如何在触摸时获取 UIImage 中特定像素的位置（或坐标）

Question

在触摸图像时，我想获取该像素的坐标，我尝试了一些代码，但没有获得用户触摸图像的确切位置。

这是我现有的代码

 override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    if let touch = touches.first {
        let position = touch.location(in: self)


        let Z1 = self.image!.size.height

        let Z2 = self.image!.size.width

        let Z3 = self.bounds.minY

        let Z4 = self.bounds.minX

        let Z5 = self.bounds.height

        let Z6 = self.bounds.width

        let pos1 = (position.x - Z4) * Z2 / Z6

        let pos2 = (position.y - Z3) * Z1 / Z5

        let point = CGPoint(x: pos1, y: pos2)
    }
}

Answer 1

你的 touchesBegan 被调用了吗？如果是这样，这应该足够了..

 override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        if let touch = touches.first {
            let pos = touch.location(in: imageView)
            print(pos.x)
            print(pos.y)
        }
    }