1:  var iPC = UIImagePickerController()

   2:          iPC.sourceType = UIImagePickerControllerSourceType.SavedPhotosAlbum

   3:          iPC.delegate = self

   4:          presentViewController(iPC, animated: true) { () -> Void in

   5:              print("complete")

   6:          }

   1:  func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) {

   2:  //        println(info)

   3:          

   4:          let img = info["UIImagePickerControllerOriginalImage"] as! UIImage

   5:          let pV = PhotoView(frame: paintView.frame, img: img)

   6:          view.addSubview(pV)

   7:          pV.delegate = self

   8:          photoView = pV

   9:          dismissViewControllerAnimated(true, completion: nil)

  10:      }

   1:   func save(){

   2:          UIGraphicsBeginImageContextWithOptions(bounds.size, false, 0.0)

   3:          var ctx = UIGraphicsGetCurrentContext()

   4:          layer.renderInContext(ctx)

   5:          let img = UIGraphicsGetImageFromCurrentImageContext()

   6:          UIGraphicsEndImageContext()

   7:          UIImageWriteToSavedPhotosAlbum(img, self, "image:didFinishSavingWithError:contextInfo:", nil)

   8:      }

   1:  func image(image: UIImage, didFinishSavingWithError error: NSErrorNSError?, contextInfo:UnsafePointer<Void>){

   2:  //        if let r = error {

   3:  //            print(r)

   4:  //        }else{

   5:  //        let e:NSError? = error

   6:          if let ee = error as NSError? {

   7:              print(ee)

   8:          }else{

   9:              UIAlertView(title:nil, message: "保存成功！", delegate: nil, cancelButtonTitle: "确定").show()

  10:          }

  11:      }