Modify custom TableViewCell size based on contents - ios

Question

I want to be able to resize my custom TableViewCell to wrap its contents, which can be a variably-sized image and/or any number of lines of text, followed by a vote bar.
My OMCFeedTableViewCell looks like this:
I have tried setting up contraints, modifying frames, nothing works correctly.
This is my code so far:
In FeedViewController:
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("OMCFeedCell", forIndexPath: indexPath) as! OMCFeedTableViewCell
let p = posts[indexPath.row]
cell.selectionStyle = .None
let data = p.content!.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)
let content = try! JSON(NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.MutableContainers))
let image = content["image"].string
let uploads = uploadAPI()
uploads.tryGetImage(image) {
(result: UIImage?) in
if let i = result {
cell.postImage.image = i
cell.postImage.contentMode = .ScaleAspectFill
let containerWidth = cell.postImage.frame.width
let aspectRatio = i.size.height / i.size.width
let scaledHeight = aspectRatio * containerWidth
// do something with the calculated height
} else {
// kill the imageview
}
}
if let text = content["text"].string {
cell.postText.text = text
// calculate the textview height
} else {
// kill the text section
}
return cell
}
override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
if heights[indexPath.row] == nil {
// calculate the correct overall height
}
return heights[indexPath.row]!
}
In OMCFeedTableViewCell:
import UIKit
class OMCFeedTableViewCell: UITableViewCell {
#IBOutlet weak var postImage: UIImageView!
#IBOutlet weak var postText: UILabel!
#IBOutlet weak var voteLabel: UILabel!
#IBOutlet weak var downVoteButton: UIButton!
#IBOutlet weak var upVoteButton: UIButton!
}

Answer 1

You can use UITableViewAutomaticDimension and it would automatically adjust your cell size depending on contents.
self.tableView.rowHeight = UITableViewAutomaticDimension
also set your estimatedRowHeigh
self.tableView.estimatedRowHeight = 120
Also from experience, sometime the bottom constraint on main content view has given me a problem, you can remove it if it bothered you.