Question

我试图在Swift 4的UIView中触摸时获取各个点的坐标。我已经看过另一篇有关类似问题的文章，但是该代码仅允许注册第一次触摸。我将不胜感激。谢谢。

Answer 1

因此，我也能够找到我的问题的答案：我在UIViewController中使用下面的代码在触摸不同位置时获得2d整数数组。感谢您的所有帮助。

var positionArray = Array(repeating: Array(repeating: 0, count: 2), count: 10)
    var counter = 0
    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        if let touch = touches.first {
            let position = touch.location(in: self.view)
            let locx = Int(position.x)
            let locy = Int(position.y)
                positionArray[counter] = [locx, locy]
                print(positionArray[counter])
                counter = counter + 1
        }
    }

Answer 2

您可以在UIView子类上实现touchesMoved回调来实现。

func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?)

在触摸过程中反复调用此功能。

这是总体思路：

override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
    guard let touch = touches.first else {
        return
    }

    let location = touch.location(in: self)
    print("x = \(location.x), y = \(location.y)")
}

Answer 3

此代码将为您每次触摸屏幕提供坐标。您可以通过将其打印出来或直接放入标签中进行测试。

@IBOutlet weak var imageView: UIImageView!
var coordinates = CGPoint.zero

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        if let touch = touches.first{
        coordinates = touch.location(in: imageView)
        print(coordinates)
        textLabel.text = "\(coordinates)"
    }
}

快速获取各种坐标以进行触摸

3 个答案: