ios - 检测长按tableview

Question

我知道如何简单地检测长按，但它是在释放后检测到的。如何在不松开手指的情况下检测到长按？

这是我现在用于长按的代码:

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.tableView.addGestureRecognizer(longPressGesture)
}

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

        }
    }
}

Answer 1

将 .ended 更改为 .began。

来自 UILongPressGestureRecognizer 的文档:

Long-press gestures are continuous. The gesture begins (UIGestureRecognizer.State.began) when the number of allowable fingers (numberOfTouchesRequired) have been pressed for the specified period (minimumPressDuration) and the touches do not move beyond the allowable range of movement (allowableMovement). The gesture recognizer transitions to the Change state whenever a finger moves, and it ends (UIGestureRecognizer.State.ended) when any of the fingers are lifted.