2017-08-13 64 views
0

我在我的viewcontroller中有一个手势识别器,当您向上和向下滑动时上下推动viewcontroller。这种手势识别器与我滑动桌面视图单元左侧以显示删除按钮的能力相冲突。TableView手势识别器影响滑动删除行

这里是我当前的代码:

进口的UIKit

class CategoriesViewController: UIViewController, UITableViewDelegate, UITableViewDataSource { 

let categories = "categories" 

var settings: UITableView = UITableView() 
var parentVC : MapBoxViewController! 

var fullView: CGFloat { 
    return 65 
} 
var partialView: CGFloat { 
    return UIScreen.main.bounds.height - 65 
} 

var halfView: CGFloat { 
    return (UIScreen.main.bounds.height/2) - 5 
} 

override func viewDidLoad() { 
    super.viewDidLoad() 
    self.view.backgroundColor = UIColor.white 
    let gesture = UIPanGestureRecognizer.init(target: self, action: #selector(CategoriesViewController.panGesture)) 
    gesture.delegate = self 
    view.addGestureRecognizer(gesture) 
    roundViews() 
    view.addSubview(settings) 

    self.automaticallyAdjustsScrollViewInsets = false 
    settings.frame = CGRect(x: 0, y: 65, width: UIScreen.main.bounds.width, height: UIScreen.main.bounds.height-65) 
    settings.delegate = self 
    settings.dataSource = self 
    settings.separatorColor = UIColor.clear 
    settings.register(CategoriesCell.self, forCellReuseIdentifier: "categories") 

} 

func roundViews() { 
    view.layer.cornerRadius = 18 
    view.clipsToBounds = true 
} 

override func didReceiveMemoryWarning() { 
    super.didReceiveMemoryWarning() 
    // Dispose of any resources that can be recreated. 
} 

func panGesture(recognizer: UIPanGestureRecognizer) { 
    let translation = recognizer.translation(in: self.view) 
    let velocity = recognizer.velocity(in: self.view) 
    let y = self.view.frame.minY 
    if (y + translation.y >= fullView) && (y + translation.y <= partialView) { 
     self.view.frame = CGRect(x: 0, y: y + translation.y, width: view.frame.width, height: view.frame.height) 
     recognizer.setTranslation(CGPoint.zero, in: self.view) 
    } 

    if recognizer.state == .ended { 
     var duration = velocity.y < 0 ? Double((y - fullView)/-velocity.y) : Double((partialView - y)/velocity.y) 

     duration = duration > 1.3 ? 1 : duration 

     UIView.animate(withDuration: duration, delay: 0.0, usingSpringWithDamping: 0.7, initialSpringVelocity: 0.4, options: [.allowUserInteraction], animations: { 
      if velocity.y >= 0 { 
       if y > self.halfView { 
        self.view.frame = CGRect(x: 0, y: self.partialView, width: self.view.frame.width, height: self.view.frame.height) 
       } else { 
        self.view.frame = CGRect(x: 0, y: self.halfView, width: self.view.frame.width, height: self.view.frame.height) 
       } 
      } else { 
       if y > self.halfView { 
        self.view.frame = CGRect(x: 0, y: self.halfView, width: self.view.frame.width, height: self.view.frame.height) 
       } else { 
        self.view.frame = CGRect(x: 0, y: self.fullView, width: self.view.frame.width, height: self.view.frame.height) 
       } 
      } 
     }, completion: nil) 
    } 
} 

override func viewDidAppear(_ animated: Bool) { 
    super.viewDidAppear(animated) 
    UIView.animate(withDuration: 0.6, delay: 0.0, usingSpringWithDamping: 0.6, initialSpringVelocity: 0.2, options: [.allowUserInteraction], animations: { 
     let frame = self.view.frame 
     self.view.frame = CGRect(x: 0, y: self.halfView, width: frame.width, height: frame.height) 
    }, completion: nil) 
} 

func numberOfSections(in tableView: UITableView) -> Int { 
    return 1 
} 

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 
    return 5 
} 

func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat { 
    return 55 
} 

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { 
    tableView.deselectRow(at: indexPath, animated: true) 
} 


func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { 
    if indexPath.row == 0 { 
     let cell = tableView.dequeueReusableCell(withIdentifier: categories) as! CategoriesCell 
     return cell 
    } else if indexPath.row == 1 { 
     let cell = tableView.dequeueReusableCell(withIdentifier: categories) as! CategoriesCell 
     cell.tripCategoryView.backgroundColor = UIColor(r: 91, g: 192, b: 235) 
     cell.tripCategory.text = "Activities" 
     return cell 
    } else if indexPath.row == 2 { 
     let cell = tableView.dequeueReusableCell(withIdentifier: categories) as! CategoriesCell 
     cell.tripCategoryView.backgroundColor = UIColor(r: 21, g: 176, b: 151) 
     cell.tripCategory.text = "Cultural" 
     return cell 
    } else if indexPath.row == 3 { 
     let cell = tableView.dequeueReusableCell(withIdentifier: categories) as! CategoriesCell 
     cell.tripCategoryView.backgroundColor = UIColor(r: 66, g: 230, b: 255) 
     cell.tripCategory.text = "Night Life" 
     return cell 
    } else if indexPath.row == 4 { 
     let cell = tableView.dequeueReusableCell(withIdentifier: categories) as! CategoriesCellvv 
     cell.tripCategoryView.backgroundColor = UIColor(r: 183, g: 157, b: 237) 
     cell.tripCategory.text = "Bars" 
     return cell 
    } else { 
     let cell = tableView.dequeueReusableCell(withIdentifier: categories) as! AllTripCategoriesCell 
     return cell 
    } 
} 
} 

extension TripCategoriesViewController: UIGestureRecognizerDelegate { 

// Solution 
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool { 
    let gesture = (gestureRecognizer as! UIPanGestureRecognizer) 
    let direction = gesture.velocity(in: view).y 

    let y = view.frame.minY 
    if (y == fullView && settings.contentOffset.y == 0 && direction > 0) || (y == partialView) { 
     settings.isScrollEnabled = false 
    } else { 
     settings.isScrollEnabled = true 
    } 

    return false 
} 
} 

将不胜感激,如果你能在这方面帮助。我想我可能需要添加一个手势识别器到我的自定义单元类

回答

0

您可以在执行任何操作之前检测手势方向。它可以通过使用UIGestureRecognizerDelegate gestureRecognizerShouldBegin方法是可行的:

override func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool { 

    //detecting a direction 
    if let recognizer = gestureRecognizer as? UIPanGestureRecognizer { 
     let velocity = recognizer.velocity(in: self) 

     if fabs(velocity.y) > fabs(velocity.x) { 
      // this is swipe up/down so you can handle that gesture 
      return true 
     }else{ 
      //this is swipe left/right 
      //do nothing for that gesture 
      return false 
     } 
    }else{ 
     return true 
    } 
} 

或者,你可以改变它任何你想要的。 希望它会有所帮助。