在表格视图中同时使用点击手势和长按 [英] Using tap gesture and long press at the same time in Table View

问题描述

我正在构建一个表格视图，但我似乎无法同时使用常规点击和长按来工作.

I'm building a table view and I cannot seem to get both regular taps and long presses to work.

我已将此代码放在我的 viewDidLoad 中:

I have placed this code in my viewDidLoad:

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

这段代码是我的手势识别器:

and this code is my gesture recognizer:

@objc func handleLongPress(sender: UILongPressGestureRecognizer){
    if UILongPressGestureRecognizer.state == UIGestureRecognizer.State.began {

        let touchPoint = UILongPressGestureRecognizer.location(in: self.myTableView)
        if let indexPath = self.myTableView.indexPathForRowAtPoint(touchPoint) {
            print(indexPath.row)
        }
    }
}

我在 Stack Overflow 上找到了这段代码，但我认为它不是 Swift 4 的最新版本，因为我什至无法在构建失败的情况下运行它.

I have found this code here on Stack Overflow, but I do not think it is up to date for Swift 4 because I can not even run it without the build failing.

推荐答案

UILongPressGestureRecognizer.state 应该是 sender.state 和 UILongPressGesutreRecognizer.location应该是 sender.location.此外，indexPathForRowAtPoint() 的签名已更新为 indexPathForRow(at:).

UILongPressGestureRecognizer.state should be sender.state and UILongPressGesutreRecognizer.location should be sender.location. Also, the signature for indexPathForRowAtPoint() has been updated to indexPathForRow(at:).

更正的代码:

@objc func handleLongPress(sender: UILongPressGestureRecognizer) {
    if sender.state == .began {
        let touchPoint = sender.location(in: self.myTableView)
        if let indexPath = self.myTableView.indexPathForRow(at:touchPoint) {
            print(indexPath.row)
        }
    }
}

UILongPressGestureRecognizer 是类名，需要调用类实例.

UILongPressGestureRecognizer is a class name, you need to be calling the class instance.

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