Question

我有一张桌子，它有一个长按手势识别器，根据选择的表行运行代码。

我遇到的麻烦是我现在必须点击我想要的那一行然后再按长按。

如何让表格选择我长按的行而不必先点击选择它？

Answer 1

以下代码适用于我：

在viewDidLoad中添加长按手势识别器：

// tapRecognizer, placed in viewDidLoad
let longPressRecognizer = UILongPressGestureRecognizer(target: self, action: "longPress:")
self.view.addGestureRecognizer(longPressRecognizer)

然后长按调用的方法如下所示：

//Called, when long press occurred
func longPress(longPressGestureRecognizer: UILongPressGestureRecognizer) {

    if longPressGestureRecognizer.state == UIGestureRecognizerState.Began {

        let touchPoint = longPressGestureRecognizer.locationInView(self.view)
        if let indexPath = tableView.indexPathForRowAtPoint(touchPoint) {

            // your code here, get the row for the indexPath or do whatever you want
    }
}

Answer 2

Swift 3功能：

func handleLongPress(_ longPressGestureRecognizer: UILongPressGestureRecognizer) {

    if longPressGestureRecognizer.state == UIGestureRecognizerState.Began {

        let touchPoint = longPressGestureRecognizer.locationInView(self.view)
        if let indexPath = tableView.indexPathForRowAtPoint(touchPoint) {

            // your code here, get the row for the indexPath or do whatever you want
    }
}

viewDidLoad中：

let longPressGesture:UILongPressGestureRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(YourViewController.handleLongPress(_:)))
longPressGesture.minimumPressDuration = 1.0 // 1 second press
longPressGesture.delegate = self
self.tableView.addGestureRecognizer(longPressGesture)

更多：https://github.com/apple/swift-evolution/blob/e4328889a9643100177aef19f6f428855c5d0cf2/proposals/0046-first-label.md

Answer 3

Swift 4

override func viewDidLoad() {
    super.viewDidLoad()
    setupLongPressGesture()
}

func setupLongPressGesture() {
    let longPressGesture:UILongPressGestureRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(self.handleLongPress))
    longPressGesture.minimumPressDuration = 1.0 // 1 second press
    longPressGesture.delegate = self
    self.tblMessage.addGestureRecognizer(longPressGesture)
}

@objc func handleLongPress(_ gestureRecognizer: UILongPressGestureRecognizer){
    if gestureRecognizer.state == .ended {
        let touchPoint = gestureRecognizer.location(in: self.tblMessage)
        if let indexPath = tblMessage.indexPathForRow(at: touchPoint) {

        }
    }
}

Swift 3

override func viewDidLoad() {
    super.viewDidLoad()
    setupLongPressGesture()
}

func setupLongPressGesture() {
    let longPressGesture:UILongPressGestureRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(YourViewController.handleLongPress(_:)))
    longPressGesture.minimumPressDuration = 1.0 // 1 second press
    longPressGesture.delegate = self
    self.tblMessage.addGestureRecognizer(longPressGesture)
}

func handleLongPress(_ longPressGestureRecognizer: UILongPressGestureRecognizer) {

    if longPressGestureRecognizer.state == UIGestureRecognizerState.Began {

        let touchPoint = longPressGestureRecognizer.locationInView(self.view)
        if let indexPath = tableView.indexPathForRowAtPoint(touchPoint) {

            // your code here, get the row for the indexPath or do whatever you want
        }
    }
}

目标 - C

UILongPressGestureRecognizer* longPressRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(onLongPress:)];
[self.tableView addGestureRecognizer:longPressRecognizer];

-(void)onLongPress:(UILongPressGestureRecognizer*)pGesture
{
    if (pGesture.state == UIGestureRecognizerStateRecognized)
    {
    //Do something to tell the user!
    }

    if (pGesture.state == UIGestureRecognizerStateEnded)
    {
        UITableView* tableView = (UITableView*)self.view;
        CGPoint touchPoint = [pGesture locationInView:self.view];
        NSIndexPath* row = [tableView indexPathForRowAtPoint:touchPoint];
        if (row != nil) {
        //Handle the long press on row
        }
    }
}

Answer 4

Swift 4

let longPressRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(longPressed(sender:)))
self.view.addGestureRecognizer(longPressRecognizer)

// MARK：动作

@objc func longPressed(sender: UILongPressGestureRecognizer) {

    if sender.state == UIGestureRecognizerState.began {

        let touchPoint = sender.location(in: self.tableView)
        if let indexPath = tableView.indexPathForRow(at: touchPoint) {

            print("Long pressed row: \(indexPath.row)")
        }
    }
}

Answer 5

对于swift的Verision 3

func longPress(_ longPressGestureRecognizer: UILongPressGestureRecognizer) {
    if longPressGestureRecognizer.state == UIGestureRecognizerState.began {
        let touchPoint = longPressGestureRecognizer.location(in: self.view)
        if let indexPath = notificationTabelView.indexPathForRow(at: touchPoint) {
            print("indexPath=\(indexPath)")
            // your code here, get the row for the indexPath or do whatever you want
        }
    }
}

在viewDidLoad函数

中

let longPressGesture:UILongPressGestureRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(EmployeeNotificationViewController.longPress(_:)))
    longPressGesture.minimumPressDuration = 1.0 // 1 second press
    longPressGesture.delegate = self as? UIGestureRecognizerDelegate
    self.notificationTabelView.addGestureRecognizer(longPressGesture)

Answer 6

为避免这种情况，您可以在UILongPressGestureRecognizer内添加cellForRowAtIndexPath，而不是didSelectRowAtIndexPath

Answer 7

您可以使用IBAction（对于CollectionView）：

@IBAction func handleLongPress(sender: AnyObject) {

    if sender.state == UIGestureRecognizerState.Began
    {
        let position = sender.locationInView(sender.view)

        if let indexPath : NSIndexPath = ((sender.view as! UICollectionView).indexPathForItemAtPoint(position))!{
            print("You holding cell #\(indexPath.item)!")
        }
    }
}

请记得与Long Press Gesture Recognizer联系。

Answer 8

let longPressGesture = UILongPressGestureRecognizer(target: self, action: (#selector(YourCustomeTableCell.longTap)))
self.addGestureRecognizer(longPressGesture)

func longTap(){
    print("Long tap")
}

Answer 9

<块引用>

斯威夫特 5

像这样在 viewDidLoad() 中声明这一行

override func viewDidLoad() {
        super.viewDidLoad()
//do other stuff here
        
        // long press listener for tableview
        let longPress = UILongPressGestureRecognizer(target: self, action: #selector(handleLongPress(sender:)))
        tableView.addGestureRecognizer(longPress)
        
    }

handleLongPress() 方法在哪里

 @objc private func handleLongPress(sender: UILongPressGestureRecognizer) {
        if sender.state == .began {
            let touchPoint = sender.location(in: tableView)
            if let indexPath = tableView.indexPathForRow(at: touchPoint) {
                let alert = UIAlertController(title: "Alert", message: "Do you want to delete this item?", preferredStyle: .alert)
                
                let action = UIAlertAction(title: "Yes", style: .default) { (action) in
                    // do your functionality

                    alert.dismiss(animated: true, completion: nil)
                    
                }
                let actionDelete = UIAlertAction(title: "No", style: .default) { (action) in
                    // do your functionality
                    alert.dismiss(animated: true, completion: nil)
                    
                }

                alert.addAction(action)
                alert.addAction(actionDelete)
                self.present(alert, animated: true, completion: nil)
                // your code here, get the row for the indexPath or do whatever you want
            }
        }
    }

WireMock

如何在Swift中长按期间选择表格行

9 个答案: