swift - 从 iOS 捕获的图像在哪里？

Question

当在 swift 中使用默认相机时，我用它来拍照，然后在 imageView 中显示它:

@IBAction func takePhoto() {
    let picker = UIImagePickerController()

    picker.delegate = self
    picker.sourceType = .Camera

    self.presentViewController(picker, animated: true, completion: nil)
}

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
    imageView.image = info[UIImagePickerControllerOriginalImage] as? UIImage
    dismissViewControllerAnimated(true, completion: nil)
}

但是我想拍下我刚刚拍摄的图像并将该图像存储在一个常量中，但我不知道我拍摄的图像是什么。我试过用这个作为图片

UIImage(named: UIImagePickerControllerOriginalImage)

UIImage(named: "spect a string here") 和 UIImagePickerControllerOriginalImage 返回一个字符串，所以我认为这可能是图像，但似乎它不会起作用。

Answer 1

你可以这样说:

var photo = UIImage() // Accessible from anywhere in the class
@IBAction func takePhoto() {
    let picker = UIImagePickerController()
    picker.delegate = self
    picker.sourceType = .Camera
    self.presentViewController(picker, animated: true, completion: nil)
}

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
    imageView.image = info[UIImagePickerControllerOriginalImage] as? UIImage
    photo = info[UIImagePickerControllerOriginalImage] as? UIImage // Assign `photo` to the image
}

在上面的代码中，photo 是一个可以从类中的任何地方访问的变量。因此，您可以从所有函数和处理程序访问它。 信息[UIImagePickerControllerOriginalImage] 作为？ UIImage 是来自相机的图像，在代码中，您将变量 photo 更改为来自相机的图像。现在，来自相机的图像稍后可以从该类(class)的任何地方获得。