How to change the size of a popover

Question

I'm having trouble changing the size of my popover presentation. Here is what I have so far

 override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) // func for popover {     if segue.identifier == "popoverView"     {         let vc = segue.destinationViewController          let controller = vc.popoverPresentationController          if controller != nil         {             controller?.delegate = self             controller?.sourceView = self.view             controller?.sourceRect = CGRect(x:CGRectGetMidX(self.view.bounds), y: CGRectGetMidY(self.view.bounds),width: 315,height: 230)             controller?.permittedArrowDirections = UIPopoverArrowDirection(rawValue: 0)         }     } } 

So far all this does is center the popover and remove the arrow, which is good. but it doesn't resize the container. any help would be greatly appreciated. thank you.

when I use preferredContentSize I get the error "Cannot assign to property: 'preferredContentSize' is immutable"

Answer 1

Set the preferred content size on the view controller being presented not the popoverPresentationController

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) // func for popover     {         if segue.identifier == "popoverView"         {             let vc = segue.destinationViewController              vc.preferredContentSize = CGSize(width: 200, height: 300)              let controller = vc.popoverPresentationController              controller?.delegate = self             //you could set the following in your storyboard             controller?.sourceView = self.view             controller?.sourceRect = CGRect(x:CGRectGetMidX(self.view.bounds), y: CGRectGetMidY(self.view.bounds),width: 315,height: 230)             controller?.permittedArrowDirections = UIPopoverArrowDirection(rawValue: 0)          }     } 

Answer 2

I fixed it via storyboard : Click on your controller Click on Attribute inspector ViewController> Check Use Preferred Explicit size and input values.