ios - 使用 Swift 2.0 将图像保存到照片库

Question

我遇到了一个问题，上面用红色突出显示。当我拍照并按使用照片时，它不会让我将拍摄的照片保存到 iPad 上的相册中。我看过其他方法，但我是 iOS 开发的初学者，我不确定如何解决这个问题。我有时也会收到 sigabrt 错误。

Answer 1

您是否提供了完成选择器？

...
UIImageWriteToSavedPhotosAlbum(imageView.image!, self, "image:didFinishSavingWithError:contextInfo:", nil) 
...



func image(image: UIImage, didFinishSavingWithError error: NSError?, contextInfo:UnsafePointer<Void>) {
    if error == nil {
        let ac = UIAlertController(title: "Saved!", message: "Your altered image has been saved to your photos.", preferredStyle: .Alert)
        ac.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
        presentViewController(ac, animated: true, completion: nil)
    } else {
        let ac = UIAlertController(title: "Save error", message: error?.localizedDescription, preferredStyle: .Alert)
        ac.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
        presentViewController(ac, animated: true, completion: nil)
    }
}

Answer 2

你可以用这个；

@IBAction func downloadButton(_ sender: Any) {
    let imageRepresentation = UIImagePNGRepresentation(photoView.image!)
    let imageData = UIImage(data: imageRepresentation!)
    UIImageWriteToSavedPhotosAlbum(imageData!, nil, nil, nil)

    let alert = UIAlertController(title: "Completed", message: "Image has been saved!", preferredStyle: .alert)
    let action = UIAlertAction(title: "Ok", style: .default, handler: nil)
    alert.addAction(action)
    self.present(alert, animated: true, completion: nil)
}