Automatically Resize UILabel - ios

Question

In Xcode 6 Beta 5, I had a chat interface that looks like the iOS 7 messages app, where the UILabel that the text was inside sized to the width of the text itself. When I updated to Beta 6, I noticed an option for UILabel in interface builder that I hadn't noticed before:
When I have the explicit width set, the width doesn't change at all based on the width of the text. When I uncheck explicit, the width of the text is at least 234, so it expands out of the view.
I am using a UICollectionView inside of a UIViewController, and here is my cell for item at index path method:
func collectionView(collectionView: UICollectionView!, cellForItemAtIndexPath indexPath: NSIndexPath!) -> UICollectionViewCell! {
let defaults = NSUserDefaults.standardUserDefaults()
let row = indexPath.row
var cell: UICollectionViewCell
let path = UIBezierPath()
let object: AnyObject = (messages[row] as NSDictionary).objectForKey("user_id")!
let uid: AnyObject = defaults.objectForKey("user_id")!
if "\(object)" == "\(uid)" {
cell = collectionView.dequeueReusableCellWithReuseIdentifier(right_chat_bubble, forIndexPath: indexPath) as UICollectionViewCell
path.moveToPoint(CGPointMake(0, 0))
path.addLineToPoint(CGPointMake(0, 10))
path.addLineToPoint(CGPointMake(12, 5))
path.addLineToPoint(CGPointMake(0, 0))
}
else {
cell = collectionView.dequeueReusableCellWithReuseIdentifier(left_chat_bubble, forIndexPath: indexPath) as UICollectionViewCell
path.moveToPoint(CGPointMake(0, 5))
path.addLineToPoint(CGPointMake(12, 10))
path.addLineToPoint(CGPointMake(12, 0))
path.addLineToPoint(CGPointMake(0, 5))
}
let initial_view = cell.viewWithTag(101) as UILabel
initial_view.layer.cornerRadius = 20
initial_view.layer.masksToBounds = true
let name = (messages[row] as NSDictionary).objectForKey("name")! as String
let name_array = name.componentsSeparatedByString(" ")
let first_initial = name_array[0]
let last_initial = name_array[1]
let first_char = first_initial[0]
let last_char = last_initial[0]
let initials = first_char + last_char
initial_view.text = initials
let circle: UIView = cell.viewWithTag(103)! as UIView
let mask = CAShapeLayer()
mask.frame = circle.bounds
mask.path = path.CGPath
circle.layer.mask = mask
let message = cell.viewWithTag(102) as ChatLabel
message.enabledTextCheckingTypes = NSTextCheckingType.Link.toRaw()
message.delegate = self
message.text = (messages[row] as NSDictionary).objectForKey("content")! as String
message.layer.cornerRadius = 15
message.layer.masksToBounds = true
message.userInteractionEnabled = true
return cell
}

Answer 1

take a look at sizeThatFits: and sizeToFit:
https://developer.apple.com/library/prerelease/ios/documentation/UIKit/Reference/UIView_class/index.html#//apple_ref/occ/instm/UIView/sizeThatFits:
https://developer.apple.com/library/prerelease/ios/documentation/UIKit/Reference/UIView_class/index.html#//apple_ref/occ/instm/UIView/sizeToFit
A UILabel can call sizeThatFits like :
myLabelLbl.text = #"some text"
CGSize maximumLabelSize = CGSizeMake(200, 800)
CGSize expectedSize = [myLabelLbl sizeThatFits:maximumLabelSize]
myLabelLbl.frame = CGRectMake(0, 0, expectedSize.width, expectedSize.height) //set the new size