import UIKit

class ThirdViewController: UIViewController {
    @IBOutlet weak var imageView: UIImageView!

    @IBOutlet weak var myTextView: UITextView!

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func textView(textView: UITextView, shouldChangeTextInRange range: NSRange, replacementText text: String) -> Bool {
        // Combine the new text with the old
        let combinedText = (textView.text as NSString).stringByReplacingCharactersInRange(range, withString: text)

        // Create attributed version of the text
        let attributedText = NSMutableAttributedString(string: combinedText)
        attributedText.addAttribute(NSFontAttributeName, value: textView.font, range: NSMakeRange(0, attributedText.length))

        // Get the padding of the text container
        let padding = textView.textContainer.lineFragmentPadding

        // Create a bounding rect size by subtracting the padding
        // from both sides and allowing for unlimited length
        let boundingSize = CGSizeMake(textView.frame.size.width - padding * 2, CGFloat.max)

        // Get the bounding rect of the attributed text in the
        // given frame
        let boundingRect = attributedText.boundingRectWithSize(boundingSize, options: NSStringDrawingOptions.UsesLineFragmentOrigin, context: nil)

        // Compare the boundingRect plus the top and bottom padding
        // to the text view height; if the new bounding height would be
        // less than or equal to the text view height, append the text
        if (boundingRect.size.height + padding * 2 <= textView.frame.size.height){
            return true
        }
        else {
            return false
        }
    }


}