这是我的代码。图片的宽度为850像素，而不是200像素：
func resizeImage(image: UIImage, newWidth: CGFloat) -> UIImage { let scale = newWidth / image.size.width let newHeight = image.size.height * scale UIGraphicsBeginImageContext(CGSizeMake(newWidth, newHeight)) image.drawInRect(CGRectMake(0, 0, newWidth, newHeight)) let newImage = UIGraphicsGetImageFromCurrentImageContext() UIGraphicsEndImageContext() return newImage}@IBAction func chooseImage(sender: AnyObject) { var myPickerController = UIImagePickerController() myPickerController.sourceType = UIImagePickerControllerSourceType.PhotoLibrary myPickerController.delegate = self; self.presentViewController(myPickerController, animated: true, completion: nil)}func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]){ var imagenow = info[UIImagePickerControllerOriginalImage] as? UIImage imageImage.image = resizeImage(imagenow!, newWidth: 200) pimg2 = imageImage.image! cidnew2 = textFieldCID!.text! pname2 = textFieldName!.text pmanu2 = textFieldMan!.text pnick2 = textFieldNick!.text podate2 = textFieldPODate!.text pno2 = textFieldArtNo!.text self.dismissViewControllerAnimated(true, completion: nil)}
