Custom Table View Cell Not Swiping - ios

Question

I have a TableViewController that has one custom prototype cell with the identifier "regularCell" set in Storyboard. The TableViewController is of the class TimelineTableViewController.swift and the cell is of the class TimelineTableViewCell.swift.swift both set in Storyboard.
In TimelineTableViewController.swift:
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.events.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = self.tableView.dequeueReusableCellWithIdentifier("regularCell", forIndexPath: indexPath) as! TimelineTableViewCell
cell.selectionStyle = .None
let event = events[indexPath.row]
cell.content.text = event.content
cell.name.text = event.name
cell.metadata.text = event.metadata
return cell
}
}
And in TimelineTableViewCell.swift I try to make the cell swipe-able but nothing happens and the pan gesture recognizer isn't being called.
import UIKit
class TimelineTableViewCell: UITableViewCell {
var originalCenter = CGPoint()
var deleteOnDragRelease = false
#IBOutlet weak var name: UILabel!
#IBOutlet weak var content: UILabel!
#IBOutlet weak var metadata: UILabel!
override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
var recognizer = UIPanGestureRecognizer(target: self, action: "handlePan:")
recognizer.delegate = self
addGestureRecognizer(recognizer)
}
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
func handlePan(recognizer: UIPanGestureRecognizer) {
// 1
if recognizer.state == .Began {
// when the gesture begins, record the current center location
originalCenter = center
}
// 2
if recognizer.state == .Changed {
let translation = recognizer.translationInView(self)
center = CGPointMake(originalCenter.x + translation.x, originalCenter.y)
// has the user dragged the item far enough to initiate a delete/complete?
deleteOnDragRelease = frame.origin.x < -frame.size.width / 2.0
}
// 3
if recognizer.state == .Ended {
// the frame this cell had before user dragged it
let originalFrame = CGRect(x: 0, y: frame.origin.y,
width: bounds.size.width, height: bounds.size.height)
if !deleteOnDragRelease {
// if the item is not being deleted, snap back to the original location
UIView.animateWithDuration(0.2, animations: {self.frame = originalFrame})
}
}
}
override func gestureRecognizerShouldBegin(gestureRecognizer: UIGestureRecognizer) -> Bool {
if let panGestureRecognizer = gestureRecognizer as? UIPanGestureRecognizer {
let translation = panGestureRecognizer.translationInView(superview!)
if fabs(translation.x) > fabs(translation.y) {
return true
}
return false
}
return false
}
}
Would anyone happen to know what I am doing wrong? The cells in the table load perfectly but they just aren't swipeable as if I never added anything. Any help or hints are greatly appreciated

Answer 1

Finally figured it out! When adding the gesture recognizer do so in awakeFromNib.
Here's the working code:
override func awakeFromNib() {
super.awakeFromNib()
var panGestureRecognizer = UIPanGestureRecognizer(target: self, action: "handlePan:")
panGestureRecognizer.delegate = self
addGestureRecognizer(panGestureRecognizer)
}
func handlePan(recognizer: UIPanGestureRecognizer) {
// 1
if recognizer.state == .Began {
// when the gesture begins, record the current center location
originalCenter = center
}
// 2
if recognizer.state == .Changed {
let translation = recognizer.translationInView(self)
center = CGPointMake(originalCenter.x + translation.x, originalCenter.y)
// has the user dragged the item far enough to initiate a delete/complete?
deleteOnDragRelease = frame.origin.x < -frame.size.width / 2.0
}
// 3
if recognizer.state == .Ended {
// the frame this cell had before user dragged it
let originalFrame = CGRect(x: 0, y: frame.origin.y,
width: bounds.size.width, height: bounds.size.height)
if !deleteOnDragRelease {
// if the item is not being deleted, snap back to the original location
UIView.animateWithDuration(0.2, animations: {self.frame = originalFrame})
}
}
}
override func gestureRecognizerShouldBegin(gestureRecognizer: UIGestureRecognizer) -> Bool {
if let panGestureRecognizer = gestureRecognizer as? UIPanGestureRecognizer {
let translation = panGestureRecognizer.translationInView(superview!)
if fabs(translation.x) > fabs(translation.y) {
return true
}
return false
}
return false
}
Do not bother with overriding init. Another alternative solution as suggested by a friend, would be to add a scrollview to the cell content view and work from there. Hope this helps!
And thanks to all who helped!