UIView's not being added to contentView? - ios

Question

I'm trying to add some views in code to the contentView of a table view cell. However nothing shows up. I get an empty cell. Below is the code of me adding subviews to the content view of a custom cell.
override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
setupViews()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
setupViews()
}
func setupViews() {
//feedback_title setup
feedback_title.text = Constants.IndividualStudiesPage.FEEDBACK_TITLE
feedback_title.numberOfLines = 0
feedback_title.lineBreakMode = .ByTruncatingTail
feedback_title.preferredMaxLayoutWidth = standard_height_width
//feedback_box setup
feedback_box.text = Constants.IndividualStudiesPage.DEFAULT_FEEDBACK
// TODO: Change to infinte (0) number of lines. Height constraint interferes with this
feedback_box.numberOfLines = 2
feedback_box.preferredMaxLayoutWidth = standard_height_width
contentView.addSubview(feedback_title)
contentView.addSubview(feedback_box)
}
Here's the interesting thing. When I add some dummy view like an empty UILabel to the content view in the storyboard, then everything shows up including the views I added in the code. Here's a picture to show you what I mean:
But when I don't add any dummy view then nothing shows up...Why and how can I fix this? Thanks in advance.
EDIT:
The feedback_cell and feedback_box are instantiated like so at the top of the class
class FeedbackCell: UITableViewCell {
var feedback_title : UILabel = UILabel.newAutoLayoutView()
var feedback_box : UILabel = UILabel.newAutoLayoutView()
newAutoLayoutView is a PureLayout function that essentially just instantiates the labels to empty views. I then update the AutoLayout constraints, also using PureLayout in the updateConstraints function:
override func updateConstraints() {
if !did_update_constraints {
//prevent labels from being compressed below intrinsic height but also from taking too much height
NSLayoutConstraint.autoSetPriority(UILayoutPriorityRequired){
self.feedback_title.autoSetContentHuggingPriorityForAxis(.Vertical)
self.feedback_title.autoSetContentCompressionResistancePriorityForAxis(.Vertical)
self.feedback_box.autoSetContentHuggingPriorityForAxis(.Vertical)
self.feedback_box.autoSetContentCompressionResistancePriorityForAxis(.Vertical)
}
//height constraints
feedback_title.autoSetDimension(.Height, toSize: standard_height_width)
//feedback_title constraints
feedback_title.autoPinEdgeToSuperviewMargin(.Leading)
feedback_title.autoPinEdgeToSuperviewMargin(.Trailing, relation: NSLayoutRelation.LessThanOrEqual)
feedback_title.autoPinEdgeToSuperviewMargin(.Top)
//feedback_box constraints
feedback_box.autoPinEdge(.Top, toEdge: .Bottom, ofView: feedback_title, withOffset: 10, relation: .GreaterThanOrEqual)
feedback_box.autoPinEdgeToSuperviewMargin(.Leading)
feedback_box.autoPinEdgeToSuperviewMargin(.Trailing, relation: NSLayoutRelation.LessThanOrEqual)
feedback_box.autoPinEdgeToSuperviewMargin(.Bottom)
did_update_constraints = true
}
super.updateConstraints()
View hierarchy debugger:
Tableview code:
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
switch (indexPath.row) {
case 0:
return setupDescriptionCell(tableView, indexPath: indexPath)
case 1:
return setupFeedbackCell(tableView, indexPath: indexPath)
case 2:
return setupStatsCell(tableView, indexPath: indexPath)
case 3:
return setupSurveyCell(tableView, indexPath: indexPath)
default:
return setupDefaultCell(tableView, indexPath: indexPath)
}
}
func setupFeedbackCell(tableView : UITableView, indexPath : NSIndexPath)->UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier(cell_IDs[1], forIndexPath: indexPath) as! FeedbackCell
//in the future download feedback in view did load and adjust here
return cell
}