如何让uitableViewCell同时处理tap和long Press？

Posted 2021-04-13

我把它放在cellForRowAtIndexPath中

let longPress = UILongPressGestureRecognizer(target: self, action: #selector(CalorieCountViewController.handleLongPress))
cell.addGestureRecognizer(longPress)
longPress.cancelsTouchesInView = true
let tapPress = UITapGestureRecognizer(target: self, action: #selector(CalorieCountViewController.handleTapPress))
cell.addGestureRecognizer(tapPress)
tapPress.cancelsTouchesInView = true

并将这些（下面的代码）放在它之外，并完全删除didSelectRowAtIndexPath函数，改为使用indexPathForSelectedRow来获取刚刚选择的行用户。

func handleLongPress(sender: UILongPressGestureRecognizer){
    let index = tableView.indexPathForSelectedRow!
    doSomething(index)
}

func handleTapPress(sender: UITapGestureRecognizer){
    let index = tableView.indexPathForSelectedRow!
    doSomethingElse(index)
}

原来indexPathForSelectedRow返回nil，但我选择了一行，并且在我的代码中没有“deselectRowAtIndexPath”。

答案

不要将UILongPressGestureRecognizer添加到Cell。将其添加到UITableView的viewDidLoad

let longPress = UILongPressGestureRecognizer(target: self, action: #selector(CalorieCountViewController.handleLongPress))
yourTableView.addGestureRecognizer(longPress)

获取触摸的细胞索引

func handleLongPress(sender: UILongPressGestureRecognizer){
    if longPressGestureRecognizer.state == UIGestureRecognizerState.Began {
         let touchPoint = longPressGestureRecognizer.locationInView(yourTableView)
         if let indexPath = yourTableView.indexPathForRowAtPoint(touchPoint) {
        // your code here, get the row for the indexPath or do whatever you want
         }
    }
}

而不是UITapGestureRecognizer使用didSelectRowAtIndexPath是一个更好的方法

另一答案

更新Swift4：

在viewController类的viewDidLoad中添加这些行（在此示例中，类的名称为YourViewController）

override func viewDidLoad() {
    super.viewDidLoad()

    let longPressRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(ViewController.longPress(longPressGestureRecognizer:)))
    self.view.addGestureRecognizer(longPressRecognizer)
}

现在在viewController类中添加这个func

@objc func longPress(longPressGestureRecognizer: UILongPressGestureRecognizer) {

    if longPressGestureRecognizer.state == UIGestureRecognizerState.began {
        let touchPoint = longPressGestureRecognizer.location(in: self.view)
        if let indexPath = tableView.indexPathForRow(at: touchPoint) {
            // add your code here
            // you can use 'indexPath' to find out which row is selected
        }
    }
}