show text from the top of UITextView in iOS 9

UITextView iOS 9.swift

    var workaroundIOS9Bug: Bool = true
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        if #available(iOS 9.0, *) {
            self.workaroundIOS9Bug = true
        }else {
            self.workaroundIOS9Bug = false
        }
    override func viewDidLayoutSubviews() {
        super.viewDidLayoutSubviews()
        if self.workaroundIOS9Bug {
            self.commonSenseTextView.contentOffset = CGPointZero
            self.workaroundIOS9Bug = false
        }
    }