我一直在努力调整图像的大小. 基本上我偶然发现了: How to scale down a UIImage and make it crispy / sharp at the same time instead of blurry?个
这似乎是一个合法的解决方案，但不知何故它不能正常工作.
我的应用程序可以处理来自Camera Roll的照片.这张照片的大小应该调整到200x200左右，但重要的是宽度，而不是高度.
不幸的是，我没有一个示例代码，因为我对无法工作的解决方案感到愤怒，所以放弃了它，对不起.
这是我的密码.图像的宽度为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)
}