Swift 3；照片未保存到照片库

此代码具有一个特殊的摄影机，该摄影机具有嵌套在其中的标题。因此，当照片保存到照片库时，标题就在照片上。相机工作得很好，但照片没有保存。我只是想知道如何将照片保存到照片库。我确实更改了plist以允许访问照片库和照相机

import Foundation
  import UIKit



class ViewController: UIViewController, OverlayViewControllerDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

var picker = UIImagePickerController()

@IBAction func letsDoThis(_ sender: AnyObject) {
             if UIImagePickerController.availableCaptureModes(for: .rear) != nil {
        picker = UIImagePickerController()
        picker.allowsEditing = false
        picker.sourceType = .camera
        picker.cameraCaptureMode = .photo
        picker.showsCameraControls = false
        let overlayViewController = OverlayViewController(nibName:"OverlayView", bundle: nil)
        let overlayView: OverlayView = overlayViewController.view as! OverlayView
        overlayView.frame = self.picker.view.frame

        overlayView.delegate = self

        picker.modalPresentationStyle = .fullScreen
        present(picker, animated: true, completion: {


            self.picker.cameraOverlayView = overlayView
        })
    } else {
        let alert = UIAlertController(title: "No Camera", message: "That's weird. No camera.", preferredStyle: .alert)
        let okay = UIAlertAction(title: "Alright Then.", style: .default, handler: nil)
        alert.addAction(okay)
        present(alert, animated: true, completion: nil)
    }
}



override func viewDidLoad() {
    super.viewDidLoad()
           picker.delegate = self
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    picker.dismiss(animated: true, completion: nil)
}

//MARK: Image Picker Controller Delegates

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    let chosenImage = info[UIImagePickerControllerOriginalImage] as! UIImage
    UIImageWriteToSavedPhotosAlbum(chosenImage, self,nil, nil)

        dismiss(animated: true, completion: nil)
}

func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
    dismiss(animated: true, completion: nil)
    print("Canceled!!")
}

func didCancel(overlayView: OverlayView) {
    dismiss(animated: true, completion: nil)
    print("dismissed!!")
}
func didShoot(overlayView: OverlayView) {
    picker.takePicture()
    overlayView.cameraLabel.text = "Shot Photo"
    print("Shot Photo")
}
}

---

这可能不是解决方案，但可能会让您进一步了解为什么不保存图像（问题注释中来自rmaddy的提示）。要查看保存时是否有错误，请使用类似的

completionTarget

和

completionSelector

参数（另请参见）：

添加

completionSelector

方法：

func image(_ image: UIImage, didFinishSavingWithError error: Error?, contextInfo: UnsafeMutableRawPointer) {
  guard error == nil else {
    print("Error saving image: \(error)")
    return
  }    
  print("Image saved successfully")
}

将UIImageWriteToSavedPhotosAlbum更改为此

UIImageWriteToSavedPhotosAlbum(chosenImage, self, #selector(self.image(_:didFinishSavingWithError:contextInfo:)), nil)

---

听起来你是说调用

UIImageWriteToSavedPhotosAlbum

实际上并没有将图像保存到相册中，对吗？阅读

UIImageWriteToSavedPhotosAlbum

的文档，并利用传递给

nil

的额外参数，以便了解发生了什么。是的，这是正确的。您所说的额外周长是什么意思？他指的是

UIImageWriteToSavedPhotosAlbum

的最后两个参数，您将其设置为

nil

。你可以看看这里的文档。最后三个参数是可选的。但这不应该是你问题的原因我think@ronatory问题的关键在于，可以通过使用回调及其错误来确定问题的原因。没有错误，它只是不保存。这对我不起作用，但保存的照片会成功打印出问题所在的位置