ios - 使用另一个 UIImageView 的 UIImageViews 坐标范围

Question

尝试设置“选定框”图形的边界的多种组合，该图形仅显示用户在 UIImageView 中触摸的位置。它仍然继续坚持 super View 坐标系

class ViewController: UIViewController {
@IBOutlet weak var selectedBox: UIImageView!
@IBOutlet weak var sodukoGrid: UIImageView!


override func viewDidLoad() {
    super.viewDidLoad()
    selectedBox.hidden = true

    selectedBox.frame.origin.x = sodukoGrid.bounds.minX
    selectedBox.frame.origin.y = sodukoGrid.bounds.minY


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

    self.sodukoGrid.userInteractionEnabled = true
    self.sodukoGrid.addGestureRecognizer(tapGestureRecognizer)

}

func tapAction(sender: UITapGestureRecognizer) {

    let touchPoint = sender.locationInView(self.sodukoGrid)

    print(touchPoint)

    selectedBox.center.x = CGFloat(touchPoint.x)
    selectedBox.center.y = CGFloat(touchPoint.y)
}

Image showing the selected box graphic still sticking to the superviews bounds

Answer 1

制作 selectedBox sodukoGrid 的 subview 或将您的点击位置更改为相对于全局 View 。

let touchPoint = sender.locationInView(view)