我想在长时间按压手势后创建一个圆圈,并在仍然按住屏幕手指的同时使其以平移手势移动。当手指从屏幕上移开时,应从其上移除圆圈。长按手势创建圆圈效果很好,只是不会移动。代码如下:
@IBAction func spaceLongPressed(_ guesture: UILongPressGestureRecognizer) {
let location = guesture.location(in: space)
var panGesture = UIPanGestureRecognizer()
circleView = UIView(frame: CGRect(x: location.x - space.bounds.height/4, y: location.y - space.bounds.height/4, width: space.bounds.height/2, height: space.bounds.height/2))
if guesture.state == .began {
circleView.backgroundColor = UIColor.red
circleView.isUserInteractionEnabled = true
circleView.tag = 100
circleView.layer.cornerRadius = circleView.bounds.height/2
space.addSubview(circleView)
panGesture = UIPanGestureRecognizer(target: space, action: #selector(didPan(sender:)))
space.addGestureRecognizer(panGesture)
}
if guesture.state == .ended {
if let viewWithTag = self.view.viewWithTag(100) {
viewWithTag.removeFromSuperview()
}
}
}
@objc func didPan(sender: UIPanGestureRecognizer) {
if sender.state == .began {
let translation = sender.translation(in: sender.view)
let changeX = (sender.view?.center.x)! + translation.x
let changeY = (sender.view?.center.y)! + translation.y
sender.view?.center = CGPoint(x: changeX, y: changeY)
sender.setTranslation(CGPoint.zero, in: sender.view)
}
}
对象“空间”为UIButton类型-我想在按钮中创建圆圈。
var circleView: UIView!
@IBAction func spaceLongPressed(_ guesture: UILongPressGestureRecognizer) {
let location = guesture.location(in: view)
let size = CGSize(width: 100, height: 100)
circleView = UIView(frame: CGRect(origin: location, size: size))
if guesture.state == .began {
circleView.backgroundColor = UIColor.red
circleView.isUserInteractionEnabled = true
circleView.tag = 100
circleView.layer.cornerRadius = circleView.bounds.height/2
view.addSubview(circleView)
}
if guesture.state == .changed {
let position = guesture.location(in: view)
if let viewWithTag = self.view.viewWithTag(100) {
viewWithTag.center = position
}
}
if guesture.state == .ended {
if let viewWithTag = self.view.viewWithTag(100) {
viewWithTag.removeFromSuperview()
}
}
}
输出:<< [