访问“照片”应用进行共享/编辑

Question

我正在制作一个照相应用程序，用于拍照并保存到照片库中。我希望用户能够像共享实际相机应用程序一样，出于共享/编辑/删除照片的目的而进入照片库。为了澄清起见，我不想访问图像选择器来选择图像，然后将其重新加载到我的应用中。我想从我的应用程序中打开实际的照片应用程序，以便用户可以使用现有的内置照片应用程序功能在其中进行操作。这可能吗？它似乎可以在默认的Apple相机应用程序中运行，但在其他任何地方都没有看到它。我似乎找不到任何有关此的信息，因为当我在Google上搜索时，我一直在获取有关图像选择器的信息。

现在我拥有的最好的是，但是你离开了我的应用程序

UIApplication.shared.open(URL(string:"photos-redirect://")!)

Answer 1

您可以实现

  

UIActivityViewController

系统提供了几种标准服务，例如将项目复制到粘贴板，将内容发布到社交媒体站点，通过电子邮件或SMS发送项目等等。应用程序还可以定义自定义服务。

https://developer.apple.com/documentation/uikit/uiactivityviewcontroller

Answer 2

创建一个新的swift文件，例如Camera.swift并将此代码复制到其中。

注意：您必须将隐私权限添加到info.plist。

import Foundation
import MobileCoreServices
import UIKit
import CoreLocation

class Camera {
    var delegate: UIImagePickerControllerDelegate & UINavigationControllerDelegate

    init(source: UIImagePickerControllerDelegate & UINavigationControllerDelegate) {
        delegate = source
    }

    func PresentPhotoInput(target: UIViewController, canEdit: Bool = false) {

        let picker = UIAlertController(title: "Select Photo Source", message: "Would you like to take a new photo or add one from your photo library?", preferredStyle: UIAlertControllerStyle.actionSheet)

        picker.addAction(UIAlertAction(title: "Camera", style: UIAlertActionStyle.default, handler: { (action) in
            self.PresentMultyCamera(target: target, canEdit: canEdit)
        }))

        picker.addAction(UIAlertAction(title: "Photo Library", style: UIAlertActionStyle.default, handler: { (action) in
            self.PresentPhotoLibrary(target: target, canEdit: canEdit)
        }))

        picker.addAction(UIAlertAction(title: "Cancel", style: UIAlertActionStyle.destructive, handler: { (action) in
            // foo
        }))

        target.present(picker, animated: true)

    }

    func PresentPhotoLibrary(target: UIViewController, canEdit: Bool) {
        if !UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.photoLibrary) && !UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.savedPhotosAlbum) {
            return
        }

        let type = kUTTypeImage as String
        let imagePicker = UIImagePickerController()

        if UIImagePickerController.isSourceTypeAvailable(.photoLibrary) {
            imagePicker.sourceType = .photoLibrary

            if let availableTypes = UIImagePickerController.availableMediaTypes(for: .photoLibrary) {
                if (availableTypes as NSArray).contains(type) {
                    /* Set up defaults */
                    imagePicker.mediaTypes = [type]
                    imagePicker.allowsEditing = canEdit
                }
            }
        } else if UIImagePickerController.isSourceTypeAvailable(.savedPhotosAlbum) {
            imagePicker.sourceType = .savedPhotosAlbum

            if let availableTypes = UIImagePickerController.availableMediaTypes(for: .savedPhotosAlbum) {
                if (availableTypes as NSArray).contains(type) {
                    imagePicker.mediaTypes = [type]
                }
            }
        } else {
            return
        }

        imagePicker.allowsEditing = canEdit
        imagePicker.delegate = delegate
        target.present(imagePicker, animated: true, completion: nil) // presents the imagepicker to the user

        return
    }

    func PresentMultyCamera(target: UIViewController, canEdit: Bool) {
        if !UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.camera) {
            return
        }

        let type1 = kUTTypeImage as String
        //let type2 = kUTTypeMovie as String

        let imagePicker = UIImagePickerController()

        if UIImagePickerController.isSourceTypeAvailable(.camera) {
            if let availableTypes = UIImagePickerController.availableMediaTypes(for: .camera) {
                if (availableTypes as NSArray).contains(type1) {
                    imagePicker.mediaTypes = [type1/*, type2*/]
                    imagePicker.sourceType = UIImagePickerControllerSourceType.camera
                    imagePicker.showsCameraControls = true
                }
            }
            if UIImagePickerController.isCameraDeviceAvailable(.rear) {
                imagePicker.cameraDevice = UIImagePickerControllerCameraDevice.rear
            } else if UIImagePickerController.isCameraDeviceAvailable(.front) {
                imagePicker.cameraDevice = UIImagePickerControllerCameraDevice.front
            }
        } else {
            // show alert, no camera available
            return
        }

        imagePicker.allowsEditing = canEdit
        imagePicker.showsCameraControls = true
        imagePicker.delegate = delegate
        target.present(imagePicker, animated: true, completion: nil) // presents the imagepicker to the user
    }

    func PresentPhotoCamera(target: UIViewController, canEdit: Bool) {
        if !UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.camera) {
            return
        }

        let type1 = kUTTypeImage as String

        let imagePicker = UIImagePickerController()

        if UIImagePickerController.isSourceTypeAvailable(.camera) {
            if let availableTypes = UIImagePickerController.availableMediaTypes(for: .camera) {
                if (availableTypes as NSArray).contains(type1) {
                    imagePicker.mediaTypes = [type1]
                    imagePicker.sourceType = UIImagePickerControllerSourceType.camera
                }
            }
            if UIImagePickerController.isCameraDeviceAvailable(.rear) {
                imagePicker.cameraDevice = UIImagePickerControllerCameraDevice.rear
            } else if UIImagePickerController.isCameraDeviceAvailable(.front) {
                imagePicker.cameraDevice = UIImagePickerControllerCameraDevice.front
            }
        } else {
            // show alert, no camera available
            return
        }

        imagePicker.allowsEditing = canEdit
        imagePicker.showsCameraControls = true
        imagePicker.delegate = delegate
        App.shared.isAuthenticating = true
        target.present(imagePicker, animated: true, completion: nil) // presents the imagepicker to the user
    }

    // Video Camera
    func PresentVideoCamera(target: UIViewController, canEdit: Bool) {
        if !UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.camera) {
            return
        }

        let type1 = kUTTypeMovie as String

        let imagePicker = UIImagePickerController()

        if UIImagePickerController.isSourceTypeAvailable(.camera) {
            if let availableTypes = UIImagePickerController.availableMediaTypes(for: .camera) {
                if (availableTypes as NSArray).contains(type1) {
                    imagePicker.mediaTypes = [type1]
                    imagePicker.sourceType = UIImagePickerControllerSourceType.camera
                    imagePicker.videoMaximumDuration = 15.0
                }
            }
            if UIImagePickerController.isCameraDeviceAvailable(.rear) {
                imagePicker.cameraDevice = UIImagePickerControllerCameraDevice.rear
            } else if UIImagePickerController.isCameraDeviceAvailable(.front) {
                imagePicker.cameraDevice = UIImagePickerControllerCameraDevice.front
            }
        } else {
            // show alert, no camera available
            return
        }

        imagePicker.allowsEditing = canEdit
        imagePicker.showsCameraControls = true
        imagePicker.delegate = delegate
        target.present(imagePicker, animated: true, completion: nil) // presents the imagepicker to the user
    }

    // video library
    func PresentVideoLibrary(target: UIViewController, canEdit: Bool) {
        if !UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.photoLibrary) && !UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.savedPhotosAlbum) {
            return
        }

        let type = kUTTypeMovie as String
        let imagePicker = UIImagePickerController()

        imagePicker.videoMaximumDuration = 15.0

        if UIImagePickerController.isSourceTypeAvailable(.photoLibrary) {
            imagePicker.sourceType = .photoLibrary

            if let availableTypes = UIImagePickerController.availableMediaTypes(for: .photoLibrary) {
                if (availableTypes as NSArray).contains(type) {
                    /* Set up defaults */
                    imagePicker.mediaTypes = [type]
                    imagePicker.allowsEditing = canEdit
                }
            }
        } else if UIImagePickerController.isSourceTypeAvailable(.savedPhotosAlbum) {
            imagePicker.sourceType = .savedPhotosAlbum

            if let availableTypes = UIImagePickerController.availableMediaTypes(for: .savedPhotosAlbum) {
                if (availableTypes as NSArray).contains(type) {
                    imagePicker.mediaTypes = [type]
                }
            }
        } else {
            return
        }

        imagePicker.allowsEditing = canEdit
        imagePicker.delegate = delegate
        target.present(imagePicker, animated: true, completion: nil) // presents the imagepicker to the user

        return
    }
}

现在，您可以使用此类来访问照片库的快捷方式。下面提供一个示例。

import Foundation
import UIKit

class Example: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    @IBAction func some_action() {
        let camera = Camera(source: self)

        camera.PresentPhotoInput(target: self)

        //camera.PresentPhotoCamera(target: self, canEdit: false)

    }

    // MARK: - Image Picker Delegate Function

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String: Any]) {


        if picker.sourceType == .photoLibrary {

            if let image = info[UIImagePickerControllerEditedImage] as? UIImage {
                // do something
            } else if let image = info[UIImagePickerControllerOriginalImage] as? UIImage {
                // do something
            }

            picker.dismiss(animated: true, completion: nil)
        } else if picker.sourceType == .camera {

            // do something

            picker.dismiss(animated: true, completion: nil)
        }
    }

}

希望这会有所帮助！