当用户在收集视图后面滑动以返回主屏幕时，我试图解除VC。它是一个简单的报价应用程序，我使用集合视图在页面上显示每个引用（总共30个）。目前，我可以检测滑动并从collectionView类中获取正确的indexPath.row计数。我只是无法弄清楚如何检测报价为0，如果用户再次向右滑动则忽略当前的VC。目前的代码如下：
func numberOfSections(in collectionView: UICollectionView) -> Int {
return 1
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return rules.rulesArray.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let randomImage = Int(arc4random_uniform(UInt32(10)))
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! myCollectionViewCell
// Cell text
cell.ruleLabel.text = rules.rulesArray[indexPath.row].uppercased()
// Change image on specific quotes
cell.ruleImage.image = UIImage(named: "Background\(randomImage)")
//detectCell(cell: indexPath.row)
return cell
}
func collectionView(_ collectionView: UICollectionView, willDisplay cell: UICollectionViewCell, forItemAt indexPath: IndexPath) {
print(indexPath.row)
// Swipe handling
if indexPath.row == 0 {
performSegue(withIdentifier: "homeView", sender: nil)
}
}
我在viewDidLoad中有滑动声明，并且是：
var swipeRight = UISwipeGestureRecognizer(target: self, action: "respondToSwipeGesture:")
swipeRight.direction = UISwipeGestureRecognizerDirection.right
self.view.addGestureRecognizer(swipeRight)
外面的功能是我曾多次使用的功能：
func respondToSwipeGesture(gesture: UIGestureRecognizer) {
if let swipeGesture = gesture as? UISwipeGestureRecognizer {
switch swipeGesture.direction {
case UISwipeGestureRecognizerDirection.right:
print("Swiped right")
case UISwipeGestureRecognizerDirection.down:
print("Swiped down")
case UISwipeGestureRecognizerDirection.left:
print("Swiped left")
case UISwipeGestureRecognizerDirection.up:
print("Swiped up")
default:
break
}
}
}
我确实试图创建一个检测单元格函数，但发现collectionView有一个我认为可以使用的willDisplay挂钩。
感谢。