英文:
How to add SwipeGesture to tableView with 0 cells in Swift
问题
我需要将左滑手势识别器添加到我的 CommentVC 中。我的 CommentVC 包括一个 tableView，所以如果在 CommentVC 中没有任何单元格，那么我就无法向左滑动。
我的代码： 使用这段代码，只有在该表格视图的区域中至少有一个单元格时才能进行左滑。但我希望在没有单元格的情况下也能左滑。我该如何实现呢？请指导我。
class CommentVC: UIViewController, UIGestureRecognizerDelegate {
override func viewDidLoad() {
super.viewDidLoad()
self.navigationController?.interactivePopGestureRecognizer?.delegate = self
self.navigationController?.interactivePopGestureRecognizer?.isEnabled = true
let swipeRight = UISwipeGestureRecognizer(target: self, action: #selector(self.respondToSwipeGesture))
swipeRight.direction = UISwipeGestureRecognizer.Direction.left
self.tableView.addGestureRecognizer(swipeRight)
}
@objc func respondToSwipeGesture(gesture: UIGestureRecognizer) {
if let swipeGesture = gesture as? UISwipeGestureRecognizer {
switch swipeGesture.direction {
case UISwipeGestureRecognizer.Direction.left:
print("向左滑动")
self.navigationController?.popViewController(animated: true)
default:
break
}
}
}
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
return true
}
}
以上是您的代码翻译部分。
英文:
I need to add a left swipe gesture recognizer to my CommentVC. My CommentVC includes a tableView, so if I have 0 cells in CommentVC then I am unable to swipe back.
My code: with this code I can swipe only if there at least one cell in that area of that tableview. But I need to swipe if there is no cell as well. How can I achieve that? Please guide me.
class CommentVC: UIViewController, UIGestureRecognizerDelegate {
override func viewDidLoad() {
super.viewDidLoad()
self.navigationController?.interactivePopGestureRecognizer?.delegate = self
self.navigationController?.interactivePopGestureRecognizer?.isEnabled = true
let swipeRight = UISwipeGestureRecognizer(target: self, action: #selector(self.respondToSwipeGesture))
swipeRight.direction = UISwipeGestureRecognizer.Direction.left
self.tableView.addGestureRecognizer(swipeRight)
}
@objc func respondToSwipeGesture(gesture: UIGestureRecognizer) {
if let swipeGesture = gesture as? UISwipeGestureRecognizer {
switch swipeGesture.direction {
case UISwipeGestureRecognizer.Direction.left:
print("Swiped left")
self.navigationController?.popViewController(animated: true)
default:
break
}
}
}
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
return true
}
}
答案1
得分: 1
根据您的问题，我推测您的代码中的 touchView 是一个 UITableView。
如果是这样，您可以简单地向表视图添加一个通用的背景视图，然后将相同的手势识别器添加到背景视图上。
// 假设 touchView 的类型是 UITableView，且其框架等于 self.view.bounds
self.touchView.backgroundView = UIView()
self.touchView.backgroundView?.addGestureRecognizer(swipeRight)
英文:
By your question, I suppose touchView in your code is a UITableView.
If so, you can simply add a generic background view to the table view, then add the same gesture recognizer to the background view.
// assuming touchView is of type UITableView, and its frame is equal to self.view.bounds
self.touchView.backgroundView = UIView()
self.touchView.backgroundView?.addGestureRecognizer(swipeRight)
答案2
得分: 1
I just tried this and its completely worked. i have just changed one line:
我刚刚尝试了这个，它完全有效。我只改了一行：
self.tableView.addGestureRecognizer(swipeRight)
以上一行我已经用这一行替换了以上一行。然后能够在UITableView中进行无单元格和有单元格的滑动。我已将UISwipeGestureRecognizer添加到包含UITableView的父视图中：
self.view.addGestureRecognizer(swipeRight)
这是完整的代码：
这是完整的代码：
class CommentVC: UIViewController, UIGestureRecognizerDelegate {
override func viewDidLoad() {
super.viewDidLoad()
self.navigationController?.interactivePopGestureRecognizer?.delegate = self
self.navigationController?.interactivePopGestureRecognizer?.isEnabled = true
let swipeRight = UISwipeGestureRecognizer(target: self, action: #selector(self.respondToSwipeGesture))
swipeRight.direction = UISwipeGestureRecognizer.Direction.left
self.view.addGestureRecognizer(swipeRight)
}
@objc func respondToSwipeGesture(gesture: UIGestureRecognizer) {
if let swipeGesture = gesture as? UISwipeGestureRecognizer {
switch swipeGesture.direction {
case UISwipeGestureRecognizer.Direction.left:
print("向左滑动")
self.navigationController?.popViewController(animated: true)
default:
break
}
}
}
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
return true
}
}
class CommentVC: UIViewController, UIGestureRecognizerDelegate {
override func viewDidLoad() {
super.viewDidLoad()
self.navigationController?.interactivePopGestureRecognizer?.delegate = self
self.navigationController?.interactivePopGestureRecognizer?.isEnabled = true
let swipeRight = UISwipeGestureRecognizer(target: self, action: #selector(self.respondToSwipeGesture))
swipeRight.direction = UISwipeGestureRecognizer.Direction.left
self.view.addGestureRecognizer(swipeRight)
}
@objc func respondToSwipeGesture(gesture: UIGestureRecognizer) {
if let swipeGesture = gesture as? UISwipeGestureRecognizer {
switch swipeGesture.direction {
case UISwipeGestureRecognizer.Direction.left:
print("向左滑动")
self.navigationController?.popViewController(animated: true)
default:
break
}
}
}
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
return true
}
}
希望这有所帮助。
英文:
I just tried this and its completely worked. i have just changed one line
self.tableView.addGestureRecognizer(swipeRight)
above line i have replaced above line with this line. then able to swipe with no cells and with cells in tableview i have added a UISwipeGestureRecognizer to the superview that contains the UITableView
self.view.addGestureRecognizer(swipeRight)
this is total code:
class CommentVC: UIViewController, UIGestureRecognizerDelegate {
override func viewDidLoad() {
super.viewDidLoad()
self.navigationController?.interactivePopGestureRecognizer?.delegate = self
self.navigationController?.interactivePopGestureRecognizer?.isEnabled = true
let swipeRight = UISwipeGestureRecognizer(target: self, action: #selector(self.respondToSwipeGesture))
swipeRight.direction = UISwipeGestureRecognizer.Direction.left
self.view.addGestureRecognizer(swipeRight)
}
@objc func respondToSwipeGesture(gesture: UIGestureRecognizer) {
if let swipeGesture = gesture as? UISwipeGestureRecognizer {
switch swipeGesture.direction {
case UISwipeGestureRecognizer.Direction.left:
print("Swiped left")
self.navigationController?.popViewController(animated: true)
default:
break
}
}
}
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
return true
}
}
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