blocks|key|4523248|text|首先，您的视图控制器需要是UIGestureRecognizerDelegate。然后在视图控制器的viewDidLoad()方法中向collectionView添加一个UILongPressGestureRecognizer|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4523249|class+ViewController:+UIViewController,+UIGestureRecognizerDelegate+{

+++++override+func+viewDidLoad()+{
+++++++++super.viewDidLoad()

++++++++let+lpgr+=+UILongPressGestureRecognizer(target:+self,+action:+"handleLongPress:")
+++++++++lpgr.minimumPressDuration+=+0.5
+++++++++lpgr.delaysTouchesBegan+=+true
+++++++++lpgr.delegate+=+self
+++++++++self.collectionView.addGestureRecognizer(lpgr)
++++}|code-block|syntax|javascript|4523250|处理长按的方法：|4523251|func+handleLongPress(gestureReconizer:+UILongPressGestureRecognizer)+{
++++++++if+gestureReconizer.state+!=+UIGestureRecognizerState.Ended+{
++++++++++++return
++++++++}

++++++++let+p+=+gestureReconizer.locationInView(self.collectionView)
++++++++let+indexPath+=+self.collectionView.indexPathForItemAtPoint(p)

++++++++if+let+index+=+indexPath+{
++++++++++++var+cell+=+self.collectionView.cellForItemAtIndexPath(index)
++++++++++++//+do+stuff+with+your+cell,+for+example+print+the+indexPath
+++++++++++++println(index.row)
++++++++}+else+{
++++++++++++println("Could+not+find+index+path")
++++++++}
++++}|4523252|此代码基于this+answer的Objective-C版本。|4523253|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/18848817/4195406^0|D|R|1E|D|0|0|0|0|5|B|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]|$9|11|A|12|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|13|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|14|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|15|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|16|8|@]|D|@$9|17|A|18|1|19]]|E|$]]|$1|Q|3|-4|5|6|7|1A|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|X]]]]

First you your view controller need to be <code>UIGestureRecognizerDelegate</code>. Then add a UILongPressGestureRecognizer to your collectionView in your viewcontroller's <code>viewDidLoad()</code> method

<pre><code>class ViewController: UIViewController, UIGestureRecognizerDelegate {

 override func viewDidLoad() {
 super.viewDidLoad()

 let lpgr = UILongPressGestureRecognizer(target: self, action: "handleLongPress:")
 lpgr.minimumPressDuration = 0.5
 lpgr.delaysTouchesBegan = true
 lpgr.delegate = self
 self.collectionView.addGestureRecognizer(lpgr)
 }
</code></pre>

The method to handle long press: 

<pre><code>func handleLongPress(gestureReconizer: UILongPressGestureRecognizer) {
 if gestureReconizer.state != UIGestureRecognizerState.Ended {
 return
 }

 let p = gestureReconizer.locationInView(self.collectionView)
 let indexPath = self.collectionView.indexPathForItemAtPoint(p)

 if let index = indexPath {
 var cell = self.collectionView.cellForItemAtIndexPath(index)
 // do stuff with your cell, for example print the indexPath
 println(index.row)
 } else {
 println("Could not find index path")
 }
 }
</code></pre>

This code is based on the Objective-C version of <a href="https://stackoverflow.com/a/18848817/4195406">this answer</a>.

blocks|key|15602|text|我发现的一件事是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|15603|if+gestureReconizer.state+!=+UIGestureRecognizerState.Ended+{
++++return
}|code-block|syntax|javascript|15604|在你松开长按键之前不会放大头针，这是可以的，但我发现|15605|if+gestureRecognizer.state+==+UIGestureRecognizerState.Began+{+}++|15606|整个功能将防止多个引脚放置，同时让引脚在满足计时器延迟的情况下立即出现。|15607|还有，上面的一个打字错误:校正器->识别器|15608|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

One thing I found was that: 

<pre><code>if gestureReconizer.state != UIGestureRecognizerState.Ended {
 return
}
</code></pre>

doesn't place pin until you release the longpress, which is OK, but I found

<pre><code>if gestureRecognizer.state == UIGestureRecognizerState.Began { } 
</code></pre>

around the whole function will prevent multiple pin placements while letting the pin appear as soon as the timer delay is satisfied. 

Also, one typo above: Reconizer -> Recognizer

blocks|key|15615|text|ztan答案已转换为swift+3语法和次要拼写更新：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|15616|func+handleLongPress(_+gestureRecognizer:+UILongPressGestureRecognizer)+{
++++if+gestureRecognizer.state+!=+UIGestureRecognizerState.ended+{
++++++return
++++}

++++let+p+=+gestureRecognizer.location(in:+collectionView)
++++let+indexPath+=+collectionView.indexPathForItem(at:+p)

++++if+let+index+=+indexPath+{
++++++var+cell+=+collectionView.cellForItem(at:+index)
++++++//+do+stuff+with+your+cell,+for+example+print+the+indexPath
++++++print(index.row)
++++}+else+{
++++++print("Could+not+find+index+path")
++++}
}|code-block|syntax|javascript|15617|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

ztan answer's converted to swift 3 syntax and minor spelling update:

<pre><code>func handleLongPress(_ gestureRecognizer: UILongPressGestureRecognizer) {
 if gestureRecognizer.state != UIGestureRecognizerState.ended {
 return
 }

 let p = gestureRecognizer.location(in: collectionView)
 let indexPath = collectionView.indexPathForItem(at: p)

 if let index = indexPath {
 var cell = collectionView.cellForItem(at: index)
 // do stuff with your cell, for example print the indexPath
 print(index.row)
 } else {
 print("Could not find index path")
 }
}
</code></pre>

blocks|key|4523316|text|将handleLongProgress转换为swift+3语法的方法运行良好。我只想补充一下，lpgr的初始化应该改为：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4523317|let+lpgr+=+UILongPressGestureRecognizer(target:+self,+action:+#selector(handleLongPress(gestureReconizer:)))|code-block|syntax|javascript|4523318|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

The method handleLongProgress converted to swift 3 syntax works fine. I just want to add that the initialization of lpgr should be changed to:

<pre><code>let lpgr = UILongPressGestureRecognizer(target: self, action: #selector(handleLongPress(gestureReconizer:)))
</code></pre>

blocks|key|15683|text|ztan答案已转换为swift+4语法和次要拼写更新：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|15684|@objc+func+handleLongPress(_+gestureRecognizer:+UILongPressGestureRecognizer)+{
++++guard+gestureRecognizer.state+!=+.ended+else+{+return+}

++++let+point+=+gestureRecognizer.location(in:+collectionView)

++++if+let+indexPath+=+collectionView.indexPathForItem(at:+point),+
+++++++let+cell+=+collectionView.cellForItem(at:+indexPath)+{
++++++++//+do+stuff+with+your+cell,+for+example+print+the+indexPath
++++++++print(indexPath.row)
++++}+else+{
++++++++print("Could+not+find+index+path")
++++}
}|code-block|syntax|javascript|15685|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

ztan answer's converted to swift 4 syntax and minor spelling update:

<pre><code>@objc func handleLongPress(_ gestureRecognizer: UILongPressGestureRecognizer) {
 guard gestureRecognizer.state != .ended else { return }

 let point = gestureRecognizer.location(in: collectionView)

 if let indexPath = collectionView.indexPathForItem(at: point), 
 let cell = collectionView.cellForItem(at: indexPath) {
 // do stuff with your cell, for example print the indexPath
 print(indexPath.row)
 } else {
 print("Could not find index path")
 }
}
</code></pre>

blocks|key|4523387|text|Swift+5和Swift+4表格视图单元格|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4523388|override+func+viewDidLoad()+{
++++//MARK:-+Add+Long+Gesture
++++let+longPressGesture+=+UILongPressGestureRecognizer(target:+self,+action:+#selector(longPressed))
++++longPressGesture.minimumPressDuration+=+1.0+//+1+second+press
++++longPressGesture.allowableMovement+=+15+//+15+points
++++longPressGesture.delegate+=+self
++++self.tablev.addGestureRecognizer(longPressGesture)
}


//MARK:-+Long+Press+Gesture
@objc+func+longPressed(sender:+UILongPressGestureRecognizer)
{

++++if+sender.state+==+UIGestureRecognizer.State.ended+{
++++++++return
++++}
++++else+if+sender.state+==+UIGestureRecognizer.State.began
++++{
++++++++let+p+=+sender.location(in:+self.tablev)
++++++++let+indexPath+=+self.tablev.indexPathForRow(at:+p)

++++++++if+let+index+=+indexPath+{
++++++++++++var+cell+=+self.tablev.cellForRow(at:+index)
++++++++++++//+do+stuff+with+your+cell,+for+example+print+the+indexPath
++++++++++++print(index.row)
++++++++++++print("longpressed+Tag:+\(index.row)")
++++++++}+else+{
++++++++++++print("Could+not+find+index+path")
++++++++}
++++}
}|code-block|syntax|javascript|4523389|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Swift 5 &amp; Swift 4 Table View Cell

<pre><code>override func viewDidLoad() {
 //MARK:- Add Long Gesture
 let longPressGesture = UILongPressGestureRecognizer(target: self, action: #selector(longPressed))
 longPressGesture.minimumPressDuration = 1.0 // 1 second press
 longPressGesture.allowableMovement = 15 // 15 points
 longPressGesture.delegate = self
 self.tablev.addGestureRecognizer(longPressGesture)
}


//MARK:- Long Press Gesture
@objc func longPressed(sender: UILongPressGestureRecognizer)
{

 if sender.state == UIGestureRecognizer.State.ended {
 return
 }
 else if sender.state == UIGestureRecognizer.State.began
 {
 let p = sender.location(in: self.tablev)
 let indexPath = self.tablev.indexPathForRow(at: p)

 if let index = indexPath {
 var cell = self.tablev.cellForRow(at: index)
 // do stuff with your cell, for example print the indexPath
 print(index.row)
 print("longpressed Tag: \(index.row)")
 } else {
 print("Could not find index path")
 }
 }
}
</code></pre>

I would like to figure out how to println the indexPath of a UICollectionViewCell when I long press on a cell.

How can I do that in Swift?

I have looked all over for an example of how to do this; can't find one in Swift.

How do I use UILongPressGestureRecognizer with a UICollectionViewCell in Swift?

Objective-C

Swift

当我长按一个单元格时，我想知道如何打印UICollectionViewCell的indexPath。我如何在Swift中做到这一点？我到处寻找如何做到这一点的例子，但在Swift中找不到。

问如何在Swift中通过UICollectionViewCell使用UILongPressGestureRecognizer？
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