自定义TextView

class LANTextView{
       
    
            let TextView = UITextView ()
            let lable= UILabel ()
       
       
       
    //
    func setTextView(targetView: UIView ,TFrame: CGRect ){
       

            TextView . frame =TFrame
           
            TextView . backgroundColor = UIColor . yellowColor ()
       
            TextView . font = UIFont . systemFontOfSize ( 18 )
       
       
            TextView . backgroundColor = UIColor . yellowColor ()
       
            TextView . alwaysBounceVertical = true
           
            targetView. addSubview ( TextView )
       
        }

        // 设置初始字
       
        func placeHolder(holderText: String ,targetVC: UIViewController ,selector: Selector ){
           
           
           
            lable . frame . origin = CGPointMake ( 6 , 8 )
           
            lable . text =holderText as String
           
            lable . font = TextView . font
           
            lable . sizeToFit ()

           
            TextView . addSubview ( lable )
            NSNotificationCenter . defaultCenter (). addObserver (targetVC, selector: selector, name: UITextViewTextDidChangeNotification , object: nil )
           
        }
       
       
//        func textChange(){
//            if(TextView.text.){
//            lable.hidden=false
//            }
//         
//            lable.hidden=true
//       
//       
//        }
       
       
        //self.view.addSubview(LANTextView)
       
       
       

    }