Xcode - Swift - UILabel height expanding for text - ios

Question

I want to make a UILabel's height expand depending on its text.
Here is what the view controller looks like, with the label selected:
Here is the code (I have tried a bunch of different similar things but this is what I have right now):
import UIKit
class ViewControllerTEST: UIViewController {
#IBOutlet weak var label: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
label.frame = CGRectMake(0, 0, CGRectGetWidth(label.bounds), 0)
label.numberOfLines = 0
label.lineBreakMode = .ByWordWrapping
label.text = "This is a really\nlong string"
label.setNeedsLayout()
label.sizeToFit()
label.frame = CGRectMake(0, 0, CGRectGetWidth(label.bounds), CGRectGetHeight(label.bounds))
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
}
And, as you can see here, it doesn't work as intended:

Answer 1

Don't use a frame, use autolayout. Add a top, leading, and trailing constraint to the label (I would suggest doing this in the storyboard). As long as you have lines equal to 0 (which you do), the height will adjust automatically. If you want to add the constraints in code, your viewDidLoad would look something like this:
override func viewDidLoad() {
super.viewDidLoad()
label.text = "This is a really\nlong string"
label.setTranslatesAutoresizingMaskIntoConstraints(false)
view.addSubview(label)
let views = ["label": label]
view.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("H:|-[label]-|", options: nil, metrics: nil, views: views))
view.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("V:|-[label]", options: nil, metrics: nil, views: views))
}