Expanding and collapsing UITableViewCells with DatePicker

Question

I\'m building an app that lets the user select dates from a UITableView. The tableView is static and grouped. I\'ve looked through many questions, including this one, trying

Answer 1

The 2 answers above enabled me to solve this problem. They deserve the credit, I'm adding this a reminder for myself - summary format.

This is my version of the above answers.

1. As noted above - add picker to a the cell you want to show / hide.

2. Add constraints for the picker in interface builder - center X / center Y / equal height / equal width to the cell's content view

3. Connect the picker to you VC

@IBOutlet weak var dobDatePicker: UIDatePicker!

You might as well control drag and add a method that will register the date changes

@IBAction func dateChanged(sender: UIDatePicker) { 
    // updates ur label in the cell above
    dobLabel.text = "\(dobDatePicker.date)"
}

4. In viewDidLoad

dobDatePicker.date = NSDate()
dobLabel.text = "\(dobDatePicker.date)" // my label in cell above
dobDatePicker.hidden = true

5. Setting cell heights, in my example the cell I want to expand is section 0, row 3... set this to what you cell you want to expand / hide. If you have many cells with various heights this allows for that.

override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {

    if indexPath.section == 0 && indexPath.row == 3 {
        let height:CGFloat = dobDatePicker.hidden ? 0.0 : 216.0
        return height
    }

    return super.tableView(tableView, heightForRowAtIndexPath: indexPath)
}

6. Selecting the cell above to expand the one below, again set this to the cell you will tap to show the cell below.

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {

let dobIndexPath = NSIndexPath(forRow: 2, inSection: 0)
if dobIndexPath == indexPath {

    dobDatePicker.hidden = !dobDatePicker.hidden

    UIView.animateWithDuration(0.3, animations: { () -> Void in
        self.tableView.beginUpdates()
        // apple bug fix - some TV lines hide after animation
        self.tableView.deselectRowAtIndexPath(indexPath, animated: true)
        self.tableView.endUpdates()
    })
}
}