如何使用"shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer"
How to use "shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer"
我正在尝试以编程方式在屏幕右侧创建 6 个 CGRect 对象，其中三个为蓝色，三个为红色。然后用户将它们拖动到屏幕的左侧，他们需要拖动蓝色块，目标是相同颜色的淡出区域。下图描述了我正在尝试做的事情。
问题是，当我将任何块拖到任何褪色区域上时，它会接受该块并将其删除。我意识到我需要实施 shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer 但我对如何实施感到困惑。我知道 gestureRecognizer 和 otherGestureRecognizer 代表两个冲突的对象，但我不知道如何用我的其余代码实现它，以便我可以确保只有蓝色块可以通过褪色的蓝色块并激活删除功能。下面是我的。
import UIKit
class ViewController: UIViewController {
private struct Constants {
static let padding: CGFloat = 75
static let correctPadding: CGFloat = 0
static let blockDimension: CGFloat = 50
}
var targetView0: UIView?
var targetView1: UIView?
var targetView2: UIView?
var targetView3: UIView?
var targetView4: UIView?
var targetView5: UIView?
var beginningPosition: CGPoint = .zero
var initialMovableViewPosition: CGPoint = .zero
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .white
addMovableViews(count: 6)
addtargetView0()
addtargetView1()
addtargetView2()
addtargetView3()
addtargetView4()
addtargetView5()
}
//This programtically creates the blocks w/ x and y
private func addMovableViews(count: Int) {
var xOffset = Constants.padding
for i in 0..<count {
print(i)
let movableView = UIView(frame: CGRect(x: 700, y: xOffset + 120, width: Constants.blockDimension, height: Constants.blockDimension))
if (i == 0) {
movableView.backgroundColor = .blue
view.addSubview(movableView)
let item0 = UIPanGestureRecognizer(target: self, action: #selector(touched))
movableView.addGestureRecognizer(item0)
} else if (i == 1) {
movableView.backgroundColor = .red
view.addSubview(movableView)
let item1 = UIPanGestureRecognizer(target: self, action: #selector(touched))
movableView.addGestureRecognizer(item1)
} else if (i == 2) {
movableView.backgroundColor = .blue
view.addSubview(movableView)
let item2 = UIPanGestureRecognizer(target: self, action: #selector(touched))
movableView.addGestureRecognizer(item2)
} else if (i == 3) {
movableView.backgroundColor = .red
view.addSubview(movableView)
let item3 = UIPanGestureRecognizer(target: self, action: #selector(touched))
movableView.addGestureRecognizer(item3)
} else if (i == 4) {
movableView.backgroundColor = .blue
view.addSubview(movableView)
let item4 = UIPanGestureRecognizer(target: self, action: #selector(touched))
movableView.addGestureRecognizer(item4)
} else if (i == 5) {
movableView.backgroundColor = .red
view.addSubview(movableView)
let item5 = UIPanGestureRecognizer(target: self, action: #selector(touched))
movableView.addGestureRecognizer(item5)
} else if (i == 6) {
movableView.backgroundColor = .blue
view.addSubview(movableView)
let item6 = UIPanGestureRecognizer(target: self, action: #selector(touched))
movableView.addGestureRecognizer(item6)
}
xOffset += Constants.blockDimension + Constants.padding
}
}
private func addtargetView0() {
let xOffset = Constants.correctPadding
targetView0 = UIView(frame: CGRect(x: xOffset + 100, y: 500, width: Constants.blockDimension, height: Constants.blockDimension))
targetView0?.backgroundColor = UIColor(red: 51/255.0, green: 153/255.0, blue: 255/255.0, alpha: 1)
view.addSubview(targetView0!)
}
private func addtargetView1() {
let xOffset = Constants.correctPadding
targetView1 = UIView(frame: CGRect(x: 100 + xOffset + 50, y: 500, width: Constants.blockDimension, height: Constants.blockDimension))
targetView1?.backgroundColor = UIColor(red: 255/255.0, green: 102/255.0, blue: 102/255.0, alpha: 1)
view.addSubview(targetView1!)
}
private func addtargetView2() {
let xOffset = Constants.correctPadding
targetView2 = UIView(frame: CGRect(x: 100 + xOffset + 100, y: 500, width: Constants.blockDimension, height: Constants.blockDimension))
targetView2?.backgroundColor = UIColor(red: 51/255.0, green: 153/255.0, blue: 255/255.0, alpha: 1)
view.addSubview(targetView2!)
}
private func addtargetView3() {
let xOffset = Constants.correctPadding
targetView3 = UIView(frame: CGRect(x: 100 + xOffset + 150, y: 500, width: Constants.blockDimension, height: Constants.blockDimension))
targetView3?.backgroundColor = UIColor(red: 255/255.0, green: 102/255.0, blue: 102/255.0, alpha: 1)
view.addSubview(targetView3!)
}
private func addtargetView4() {
let xOffset = Constants.correctPadding
targetView4 = UIView(frame: CGRect(x: 100 + xOffset + 200, y: 500, width: Constants.blockDimension, height: Constants.blockDimension))
targetView4?.backgroundColor = UIColor(red: 51/255.0, green: 153/255.0, blue: 255/255.0, alpha: 1)
view.addSubview(targetView4!)
}
private func addtargetView5() {
let xOffset = Constants.correctPadding
targetView5 = UIView(frame: CGRect(x: 100 + xOffset + 250, y: 500, width: Constants.blockDimension, height: Constants.blockDimension))
targetView5?.backgroundColor = UIColor(red: 255/255.0, green: 102/255.0, blue: 102/255.0, alpha: 1)
view.addSubview(targetView5!)
}
//Gesture recognizer
@objc private func touched(_ gestureRecognizer: UIGestureRecognizer) {
if let touchedView = gestureRecognizer.view {
if gestureRecognizer.state == .began {
beginningPosition = gestureRecognizer.location(in: touchedView)
initialMovableViewPosition = touchedView.frame.origin
} else if gestureRecognizer.state == .ended {
//Moves it back to where it was
// touchedView.frame.origin = initialMovableViewPosition
} else if gestureRecognizer.state == .changed {
let locationInView = gestureRecognizer.location(in: touchedView)
touchedView.frame.origin = CGPoint(x: touchedView.frame.origin.x + locationInView.x - beginningPosition.x, y: touchedView.frame.origin.y + locationInView.y - beginningPosition.y)
if touchedView.frame.intersects(targetView0!.frame) {
touchedView.removeFromSuperview() //Might uncomment when everything is set up so it deals with the overlay issue
// gestureRecognizer.isEnabled = false
targetView0?.backgroundColor = .blue
initialMovableViewPosition = .zero
}
if touchedView.frame.intersects(targetView1!.frame) {
touchedView.removeFromSuperview() //Might uncomment when everything is set up so it deals with the overlay issue
// gestureRecognizer.isEnabled = false
targetView1?.backgroundColor = .red
initialMovableViewPosition = .zero
}
if touchedView.frame.intersects(targetView2!.frame) {
touchedView.removeFromSuperview() //Might uncomment when everything is set up so it deals with the overlay issue
// gestureRecognizer.isEnabled = false
targetView2?.backgroundColor = .blue
initialMovableViewPosition = .zero
}
if touchedView.frame.intersects(targetView3!.frame) {
touchedView.removeFromSuperview() //Might uncomment when everything is set up so it deals with the overlay issue
// gestureRecognizer.isEnabled = false
targetView3?.backgroundColor = .red
initialMovableViewPosition = .zero
}
if touchedView.frame.intersects(targetView4!.frame) {
touchedView.removeFromSuperview() //Might uncomment when everything is set up so it deals with the overlay issue
// gestureRecognizer.isEnabled = false
targetView4?.backgroundColor = .blue
initialMovableViewPosition = .zero
}
if touchedView.frame.intersects(targetView5!.frame) {
touchedView.removeFromSuperview() //Might uncomment when everything is set up so it deals with the overlay issue
// gestureRecognizer.isEnabled = false
targetView5?.backgroundColor = .red
initialMovableViewPosition = .zero
}
}
}
}
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer,
shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer)
-> Bool {
// If the gesture recognizers are on diferent views, do not allow
// simultaneous recognition.
if gestureRecognizer.view != otherGestureRecognizer.view {
return false
}
return true
}
init() {
super.init(nibName: nil, bundle: nil)
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
有人可以解释如何合并 shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer、link 一个完整的项目来做类似的事情，或者引导我完成它。感谢任何帮助。
我明白了。它基本上只是在手势 if 语句中。
@objc private func touched(_ gestureRecognizer: UIGestureRecognizer) {
if let touchedView = gestureRecognizer.view {
if gestureRecognizer.state == .began {
beginningPosition = gestureRecognizer.location(in: touchedView)
initialMovableViewPosition = touchedView.frame.origin
} else if gestureRecognizer.state == .ended {
//Moves it back to where it was
// touchedView.frame.origin = initialMovableViewPosition
} else if gestureRecognizer.state == .changed {
let locationInView = gestureRecognizer.location(in: touchedView)
touchedView.frame.origin = CGPoint(x: touchedView.frame.origin.x + locationInView.x - beginningPosition.x, y: touchedView.frame.origin.y + locationInView.y - beginningPosition.y)
if ((touchedView.backgroundColor == .blue) && (targetView0?.backgroundColor == UIColor(red: 51/255.0, green: 153/255.0, blue: 255/255.0, alpha: 1)) && (touchedView.frame.intersects(targetView0!.frame))) {
touchedView.removeFromSuperview() //Might uncomment when everything is set up so it deals with the overlay issue
// gestureRecognizer.isEnabled = false
targetView0?.backgroundColor = .blue
initialMovableViewPosition = .zero
}
if ((touchedView.backgroundColor == .red) && (targetView1?.backgroundColor == UIColor(red: 255/255.0, green: 102/255.0, blue: 102/255.0, alpha: 1)) && (touchedView.frame.intersects(targetView1!.frame))) {
touchedView.removeFromSuperview() //Might uncomment when everything is set up so it deals with the overlay issue
// gestureRecognizer.isEnabled = false
targetView1?.backgroundColor = .red
initialMovableViewPosition = .zero
}
if ((touchedView.backgroundColor == .blue) && (targetView2?.backgroundColor == UIColor(red: 51/255.0, green: 153/255.0, blue: 255/255.0, alpha: 1)) && (touchedView.frame.intersects(targetView2!.frame))) {
touchedView.removeFromSuperview() //Might uncomment when everything is set up so it deals with the overlay issue
// gestureRecognizer.isEnabled = false
targetView2?.backgroundColor = .blue
initialMovableViewPosition = .zero
}
if ((touchedView.backgroundColor == .red) && (targetView3?.backgroundColor == UIColor(red: 255/255.0, green: 102/255.0, blue: 102/255.0, alpha: 1)) && (touchedView.frame.intersects(targetView3!.frame))) {
touchedView.removeFromSuperview() //Might uncomment when everything is set up so it deals with the overlay issue
// gestureRecognizer.isEnabled = false
targetView3?.backgroundColor = .red
initialMovableViewPosition = .zero
}
if ((touchedView.backgroundColor == .blue) && (targetView4?.backgroundColor == UIColor(red: 51/255.0, green: 153/255.0, blue: 255/255.0, alpha: 1)) && (touchedView.frame.intersects(targetView4!.frame))) {
touchedView.removeFromSuperview() //Might uncomment when everything is set up so it deals with the overlay issue
// gestureRecognizer.isEnabled = false
targetView4?.backgroundColor = .blue
initialMovableViewPosition = .zero
}
if ((touchedView.backgroundColor == .red) && (targetView5?.backgroundColor == UIColor(red: 255/255.0, green: 102/255.0, blue: 102/255.0, alpha: 1)) && (touchedView.frame.intersects(targetView5!.frame))) {
touchedView.removeFromSuperview() //Might uncomment when everything is set up so it deals with the overlay issue
// gestureRecognizer.isEnabled = false
targetView5?.backgroundColor = .red
initialMovableViewPosition = .zero
}
}
}
}
你检查gestureRecognizer的背景颜色是不是蓝色，通过UIColor检查targetView的背景颜色是不是淡蓝色，视图是否相交，然后你做你需要的。您甚至可以使用额外的 if 语句按照您想要的顺序填充目标视图。
这里有一些问题。首先，您的手势的代表没有被设置。为此，您需要 ViewController 来扩展 UIGestureRecognizerDelegate，就像这样 class ViewController: UIViewController, UIGestureRecognizerDelegate。然后，您需要将每个手势的委托设置为 ViewController:
let item0 = UIPanGestureRecognizer(target: self, action: #selector(touched))
item0.delegate = self
movableView.addGestureRecognizer(item0)
其次，即使设置了代表，也永远不会调用 shouldRecognizeSimultaneouslyWith，因为每个可移动视图只有一种类型的手势 (UIPanGestureRecognizer)。您的目标视图本身没有分配给它们的任何手势识别器。如果你想测试 shouldRecognizeSimultaneouslyWith 何时被调用，你可以尝试执行以下操作：
let item0 = UIPanGestureRecognizer(target: self, action: #selector(touched))
item0.delegate = self
movableView.addGestureRecognizer(item0)
// Add another gesture
let testitem = UITapGestureRecognizer(target: self, action: #selector(test))
movableView.addGestureRecognizer(testitem)
在上面的示例中，UITapGestureRecognizer 和 UIPanGestureRecognizer 都会在您开始拖动可移动视图时触发。
===解决方案===
我建议不要使用 shouldRecognizeSimultaneouslyWith，而是向每个可移动视图和目标视图添加标签吗？例如，对于所有蓝色可移动和目标视图，movableView.tag = 0，对于所有红色可移动和目标视图，movableView.tag = 1.
然后，在您的 touched 操作中，您可以像这样检查标签是否匹配：
if touchedView.frame.intersects(targetView0!.frame) {
if touchedView.tag == targetView0?.tag {
touchedView.removeFromSuperview()
targetView0?.backgroundColor = .blue
initialMovableViewPosition = .zero
}
}
我正在尝试以编程方式在屏幕右侧创建 6 个 CGRect 对象，其中三个为蓝色，三个为红色。然后用户将它们拖动到屏幕的左侧，他们需要拖动蓝色块，目标是相同颜色的淡出区域。下图描述了我正在尝试做的事情。
问题是，当我将任何块拖到任何褪色区域上时，它会接受该块并将其删除。我意识到我需要实施 shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer 但我对如何实施感到困惑。我知道 gestureRecognizer 和 otherGestureRecognizer 代表两个冲突的对象，但我不知道如何用我的其余代码实现它，以便我可以确保只有蓝色块可以通过褪色的蓝色块并激活删除功能。下面是我的。
import UIKit
class ViewController: UIViewController {
private struct Constants {
static let padding: CGFloat = 75
static let correctPadding: CGFloat = 0
static let blockDimension: CGFloat = 50
}
var targetView0: UIView?
var targetView1: UIView?
var targetView2: UIView?
var targetView3: UIView?
var targetView4: UIView?
var targetView5: UIView?
var beginningPosition: CGPoint = .zero
var initialMovableViewPosition: CGPoint = .zero
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .white
addMovableViews(count: 6)
addtargetView0()
addtargetView1()
addtargetView2()
addtargetView3()
addtargetView4()
addtargetView5()
}
//This programtically creates the blocks w/ x and y
private func addMovableViews(count: Int) {
var xOffset = Constants.padding
for i in 0..<count {
print(i)
let movableView = UIView(frame: CGRect(x: 700, y: xOffset + 120, width: Constants.blockDimension, height: Constants.blockDimension))
if (i == 0) {
movableView.backgroundColor = .blue
view.addSubview(movableView)
let item0 = UIPanGestureRecognizer(target: self, action: #selector(touched))
movableView.addGestureRecognizer(item0)
} else if (i == 1) {
movableView.backgroundColor = .red
view.addSubview(movableView)
let item1 = UIPanGestureRecognizer(target: self, action: #selector(touched))
movableView.addGestureRecognizer(item1)
} else if (i == 2) {
movableView.backgroundColor = .blue
view.addSubview(movableView)
let item2 = UIPanGestureRecognizer(target: self, action: #selector(touched))
movableView.addGestureRecognizer(item2)
} else if (i == 3) {
movableView.backgroundColor = .red
view.addSubview(movableView)
let item3 = UIPanGestureRecognizer(target: self, action: #selector(touched))
movableView.addGestureRecognizer(item3)
} else if (i == 4) {
movableView.backgroundColor = .blue
view.addSubview(movableView)
let item4 = UIPanGestureRecognizer(target: self, action: #selector(touched))
movableView.addGestureRecognizer(item4)
} else if (i == 5) {
movableView.backgroundColor = .red
view.addSubview(movableView)
let item5 = UIPanGestureRecognizer(target: self, action: #selector(touched))
movableView.addGestureRecognizer(item5)
} else if (i == 6) {
movableView.backgroundColor = .blue
view.addSubview(movableView)
let item6 = UIPanGestureRecognizer(target: self, action: #selector(touched))
movableView.addGestureRecognizer(item6)
}
xOffset += Constants.blockDimension + Constants.padding
}
}
private func addtargetView0() {
let xOffset = Constants.correctPadding
targetView0 = UIView(frame: CGRect(x: xOffset + 100, y: 500, width: Constants.blockDimension, height: Constants.blockDimension))
targetView0?.backgroundColor = UIColor(red: 51/255.0, green: 153/255.0, blue: 255/255.0, alpha: 1)
view.addSubview(targetView0!)
}
private func addtargetView1() {
let xOffset = Constants.correctPadding
targetView1 = UIView(frame: CGRect(x: 100 + xOffset + 50, y: 500, width: Constants.blockDimension, height: Constants.blockDimension))
targetView1?.backgroundColor = UIColor(red: 255/255.0, green: 102/255.0, blue: 102/255.0, alpha: 1)
view.addSubview(targetView1!)
}
private func addtargetView2() {
let xOffset = Constants.correctPadding
targetView2 = UIView(frame: CGRect(x: 100 + xOffset + 100, y: 500, width: Constants.blockDimension, height: Constants.blockDimension))
targetView2?.backgroundColor = UIColor(red: 51/255.0, green: 153/255.0, blue: 255/255.0, alpha: 1)
view.addSubview(targetView2!)
}
private func addtargetView3() {
let xOffset = Constants.correctPadding
targetView3 = UIView(frame: CGRect(x: 100 + xOffset + 150, y: 500, width: Constants.blockDimension, height: Constants.blockDimension))
targetView3?.backgroundColor = UIColor(red: 255/255.0, green: 102/255.0, blue: 102/255.0, alpha: 1)
view.addSubview(targetView3!)
}
private func addtargetView4() {
let xOffset = Constants.correctPadding
targetView4 = UIView(frame: CGRect(x: 100 + xOffset + 200, y: 500, width: Constants.blockDimension, height: Constants.blockDimension))
targetView4?.backgroundColor = UIColor(red: 51/255.0, green: 153/255.0, blue: 255/255.0, alpha: 1)
view.addSubview(targetView4!)
}
private func addtargetView5() {
let xOffset = Constants.correctPadding
targetView5 = UIView(frame: CGRect(x: 100 + xOffset + 250, y: 500, width: Constants.blockDimension, height: Constants.blockDimension))
targetView5?.backgroundColor = UIColor(red: 255/255.0, green: 102/255.0, blue: 102/255.0, alpha: 1)
view.addSubview(targetView5!)
}
//Gesture recognizer
@objc private func touched(_ gestureRecognizer: UIGestureRecognizer) {
if let touchedView = gestureRecognizer.view {
if gestureRecognizer.state == .began {
beginningPosition = gestureRecognizer.location(in: touchedView)
initialMovableViewPosition = touchedView.frame.origin
} else if gestureRecognizer.state == .ended {
//Moves it back to where it was
// touchedView.frame.origin = initialMovableViewPosition
} else if gestureRecognizer.state == .changed {
let locationInView = gestureRecognizer.location(in: touchedView)
touchedView.frame.origin = CGPoint(x: touchedView.frame.origin.x + locationInView.x - beginningPosition.x, y: touchedView.frame.origin.y + locationInView.y - beginningPosition.y)
if touchedView.frame.intersects(targetView0!.frame) {
touchedView.removeFromSuperview() //Might uncomment when everything is set up so it deals with the overlay issue
// gestureRecognizer.isEnabled = false
targetView0?.backgroundColor = .blue
initialMovableViewPosition = .zero
}
if touchedView.frame.intersects(targetView1!.frame) {
touchedView.removeFromSuperview() //Might uncomment when everything is set up so it deals with the overlay issue
// gestureRecognizer.isEnabled = false
targetView1?.backgroundColor = .red
initialMovableViewPosition = .zero
}
if touchedView.frame.intersects(targetView2!.frame) {
touchedView.removeFromSuperview() //Might uncomment when everything is set up so it deals with the overlay issue
// gestureRecognizer.isEnabled = false
targetView2?.backgroundColor = .blue
initialMovableViewPosition = .zero
}
if touchedView.frame.intersects(targetView3!.frame) {
touchedView.removeFromSuperview() //Might uncomment when everything is set up so it deals with the overlay issue
// gestureRecognizer.isEnabled = false
targetView3?.backgroundColor = .red
initialMovableViewPosition = .zero
}
if touchedView.frame.intersects(targetView4!.frame) {
touchedView.removeFromSuperview() //Might uncomment when everything is set up so it deals with the overlay issue
// gestureRecognizer.isEnabled = false
targetView4?.backgroundColor = .blue
initialMovableViewPosition = .zero
}
if touchedView.frame.intersects(targetView5!.frame) {
touchedView.removeFromSuperview() //Might uncomment when everything is set up so it deals with the overlay issue
// gestureRecognizer.isEnabled = false
targetView5?.backgroundColor = .red
initialMovableViewPosition = .zero
}
}
}
}
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer,
shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer)
-> Bool {
// If the gesture recognizers are on diferent views, do not allow
// simultaneous recognition.
if gestureRecognizer.view != otherGestureRecognizer.view {
return false
}
return true
}
init() {
super.init(nibName: nil, bundle: nil)
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
有人可以解释如何合并 shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer、link 一个完整的项目来做类似的事情，或者引导我完成它。感谢任何帮助。
我明白了。它基本上只是在手势 if 语句中。
@objc private func touched(_ gestureRecognizer: UIGestureRecognizer) {
if let touchedView = gestureRecognizer.view {
if gestureRecognizer.state == .began {
beginningPosition = gestureRecognizer.location(in: touchedView)
initialMovableViewPosition = touchedView.frame.origin
} else if gestureRecognizer.state == .ended {
//Moves it back to where it was
// touchedView.frame.origin = initialMovableViewPosition
} else if gestureRecognizer.state == .changed {
let locationInView = gestureRecognizer.location(in: touchedView)
touchedView.frame.origin = CGPoint(x: touchedView.frame.origin.x + locationInView.x - beginningPosition.x, y: touchedView.frame.origin.y + locationInView.y - beginningPosition.y)
if ((touchedView.backgroundColor == .blue) && (targetView0?.backgroundColor == UIColor(red: 51/255.0, green: 153/255.0, blue: 255/255.0, alpha: 1)) && (touchedView.frame.intersects(targetView0!.frame))) {
touchedView.removeFromSuperview() //Might uncomment when everything is set up so it deals with the overlay issue
// gestureRecognizer.isEnabled = false
targetView0?.backgroundColor = .blue
initialMovableViewPosition = .zero
}
if ((touchedView.backgroundColor == .red) && (targetView1?.backgroundColor == UIColor(red: 255/255.0, green: 102/255.0, blue: 102/255.0, alpha: 1)) && (touchedView.frame.intersects(targetView1!.frame))) {
touchedView.removeFromSuperview() //Might uncomment when everything is set up so it deals with the overlay issue
// gestureRecognizer.isEnabled = false
targetView1?.backgroundColor = .red
initialMovableViewPosition = .zero
}
if ((touchedView.backgroundColor == .blue) && (targetView2?.backgroundColor == UIColor(red: 51/255.0, green: 153/255.0, blue: 255/255.0, alpha: 1)) && (touchedView.frame.intersects(targetView2!.frame))) {
touchedView.removeFromSuperview() //Might uncomment when everything is set up so it deals with the overlay issue
// gestureRecognizer.isEnabled = false
targetView2?.backgroundColor = .blue
initialMovableViewPosition = .zero
}
if ((touchedView.backgroundColor == .red) && (targetView3?.backgroundColor == UIColor(red: 255/255.0, green: 102/255.0, blue: 102/255.0, alpha: 1)) && (touchedView.frame.intersects(targetView3!.frame))) {
touchedView.removeFromSuperview() //Might uncomment when everything is set up so it deals with the overlay issue
// gestureRecognizer.isEnabled = false
targetView3?.backgroundColor = .red
initialMovableViewPosition = .zero
}
if ((touchedView.backgroundColor == .blue) && (targetView4?.backgroundColor == UIColor(red: 51/255.0, green: 153/255.0, blue: 255/255.0, alpha: 1)) && (touchedView.frame.intersects(targetView4!.frame))) {
touchedView.removeFromSuperview() //Might uncomment when everything is set up so it deals with the overlay issue
// gestureRecognizer.isEnabled = false
targetView4?.backgroundColor = .blue
initialMovableViewPosition = .zero
}
if ((touchedView.backgroundColor == .red) && (targetView5?.backgroundColor == UIColor(red: 255/255.0, green: 102/255.0, blue: 102/255.0, alpha: 1)) && (touchedView.frame.intersects(targetView5!.frame))) {
touchedView.removeFromSuperview() //Might uncomment when everything is set up so it deals with the overlay issue
// gestureRecognizer.isEnabled = false
targetView5?.backgroundColor = .red
initialMovableViewPosition = .zero
}
}
}
}
你检查gestureRecognizer的背景颜色是不是蓝色，通过UIColor检查targetView的背景颜色是不是淡蓝色，视图是否相交，然后你做你需要的。您甚至可以使用额外的 if 语句按照您想要的顺序填充目标视图。
这里有一些问题。首先，您的手势的代表没有被设置。为此，您需要 ViewController 来扩展 UIGestureRecognizerDelegate，就像这样 class ViewController: UIViewController, UIGestureRecognizerDelegate。然后，您需要将每个手势的委托设置为 ViewController:
let item0 = UIPanGestureRecognizer(target: self, action: #selector(touched))
item0.delegate = self
movableView.addGestureRecognizer(item0)
其次，即使设置了代表，也永远不会调用 shouldRecognizeSimultaneouslyWith，因为每个可移动视图只有一种类型的手势 (UIPanGestureRecognizer)。您的目标视图本身没有分配给它们的任何手势识别器。如果你想测试 shouldRecognizeSimultaneouslyWith 何时被调用，你可以尝试执行以下操作：
let item0 = UIPanGestureRecognizer(target: self, action: #selector(touched))
item0.delegate = self
movableView.addGestureRecognizer(item0)
// Add another gesture
let testitem = UITapGestureRecognizer(target: self, action: #selector(test))
movableView.addGestureRecognizer(testitem)
在上面的示例中，UITapGestureRecognizer 和 UIPanGestureRecognizer 都会在您开始拖动可移动视图时触发。
===解决方案===
我建议不要使用 shouldRecognizeSimultaneouslyWith，而是向每个可移动视图和目标视图添加标签吗？例如，对于所有蓝色可移动和目标视图，movableView.tag = 0，对于所有红色可移动和目标视图，movableView.tag = 1.
然后，在您的 touched 操作中，您可以像这样检查标签是否匹配：
if touchedView.frame.intersects(targetView0!.frame) {
if touchedView.tag == targetView0?.tag {
touchedView.removeFromSuperview()
targetView0?.backgroundColor = .blue
initialMovableViewPosition = .zero
}
}