ios - Swift 3 转换 "has no member"错误

Question

我正在尝试将我的项目转换为 Swift 3，并且已经解决了大部分错误，但我在调用我的手势识别器时遇到问题。这是我的代码:

func addGestureToView(toView: UIView) {
    let gesutereUp = Init(UISwipeGestureRecognizer(target: self, action: #selector(DemoViewController.swipeHandler(_:)))) {
      $0.direction = .Up
    }

    let gesutereDown = Init(UISwipeGestureRecognizer(target: self, action: #selector(DemoViewController.swipeHandler(_:)))) {
      $0.direction = .Down
    }
    toView.addGestureRecognizer(gesutereUp)
    toView.addGestureRecognizer(gesutereDown)
  }

  func swipeHandler(sender: UISwipeGestureRecognizer) {
    let indexPath = NSIndexPath(forRow: currentIndex, inSection: 0)
    guard let cell  = collectionView?.cellForItemAtIndexPath(indexPath) as? DemoCollectionViewCell else { return }

它给我错误提示 gestureUp 和 gestureDown 都“没有成员‘swipeHandler’”

同样在“let indexPath...”这一行，我收到一条错误消息“参数标签‘(forRow, in section:)’不匹配任何可用的重载”

有人可以帮忙解决 Swift 3 的转换问题吗？当我评论这些行时，一切正常，所以这是最后一篇。提前致谢。

Answer 1

替换选择器中标签sender的下划线。

#selector(DemoViewController.swipeHandler(sender:))

关于索引路径，swift3中新的方法是:

NSIndexPath(row: currentIndex, section: 0)