Could not cast value of type 'UITableViewCell' to 'AppName.CustomCellName'

Question

I am trying to create a custom cell that expands on tap. I am using this github example: https://github.com/rcdilorenzo/Cell-Expander

This line gives runtime error SIGABRT:

override func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {
    (cell as! EventTableViewCell).watchFrameChanges()
    //Could not cast value of type 'UITableViewCell' (0x105aa1b80) to 'AppName.EventTableViewCell' (0x104287fe0).
}

I also checked answer from this post, followed three steps, but no luck: Could not cast value of type 'UITableViewCell' to '(AppName).(CustomCellName)'

My custom cell class looks like this:

import UIKit

class EventTableViewCell : UITableViewCell {
...
}

cellForRowAtIndexPath:

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier( "eventCell", forIndexPath: indexPath)

    let date = self.eventArray[indexPath.row].startTime
    let calendar = NSCalendar.currentCalendar()
    let minutes = calendar.component(NSCalendarUnit.Minute, fromDate: date)
    var minutesString: String
    if (minutes == 0) {
        minutesString = "00"
    } else {
        minutesString = String(calendar.component(NSCalendarUnit.Minute, fromDate: date))
    }
    let hours = calendar.component(NSCalendarUnit.Hour, fromDate: date)
    cell.textLabel?.text = self.eventArray[indexPath.row].title + " - \(hours):\(minutesString)"

    return cell
    }
}

Please help.

Answer 1

"I have self.tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: "eventCell") in my viewDidLoad"

That's probably overriding the value you set in the storyboard. Try removing this line, or change it to self.tableView.registerClass(EventTableViewCell.self, forCellReuseIdentifier: "eventCell").

Answer 2

In the storyboard, click on the cell and set the class name to EventTableViewCell instead of UITableViewCell

Or if you are doing everything programmatically, in cellForRowAtIndexPath do this instead:

 var cell : EventTableViewCell?
 cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier) as! EventTableViewCell?
 if cell == nil {
           cell = EventTableViewCell(style: UITableViewCellStyle.Default, reuseIdentifier: "eventCell")
 }
return cell