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Swift-UIImagePickerController-使用方法？

私はこれがどのように機能するかを理解しようと努力していますが、私にとってはかなり難しいです。 =）ビューが1つあり、プレビュー用に1つのボタンと1つの小さなImageViewエリアがあります。ボタンはimagepickercontrollerをトリガーし、UIViewは選択された画像を表示します。エラーはありませんが、画像はUIImageView領域に表示されません。

var imagePicker = UIImagePickerController()
@IBOutlet var imagePreview : UIImageView

@IBAction func AddImageButton(sender : AnyObject) {
    imagePicker.modalPresentationStyle = UIModalPresentationStyle.CurrentContext
    imagePicker.delegate = self
    self.presentModalViewController(imagePicker, animated: true)

}
func imagePickerController(picker: UIImagePickerController!, didFinishPickingMediaWithInfo info:NSDictionary!) {
    var tempImage:UIImage = info[UIImagePickerControllerOriginalImage] as UIImage
    imagePreview.image  = tempImage

    self.dismissModalViewControllerAnimated(true)

}

func imagePickerControllerDidCancel(picker: UIImagePickerController!) {

    self.dismissModalViewControllerAnimated(true)
}
iosswiftuiimagepickercontroller
40
user3806731

UIImageという名前のUIImagePickerControllerOriginalImageを取得していますが、そのような画像は存在しません。 UIImage辞書のキーUIImagePickerControllerOriginalImageでeditingInfoを取得するつもりです。

let tempImage = editingInfo[UIImagePickerControllerOriginalImage] as! UIImage
35
Jesper
import MobileCoreServices

class SecondViewController: UIViewController,UINavigationControllerDelegate, UIImagePickerControllerDelegate {

   @IBOutlet var img:UIImageView!=nil

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

   override func didReceiveMemoryWarning() 
   {
       super.didReceiveMemoryWarning()

   }

   @IBAction func buttonTapped(AnyObject)
   {
     if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.PhotoLibrary){
            println("Button capture")
            var imag = UIImagePickerController()
            imag.delegate = self
            imag.sourceType = UIImagePickerControllerSourceType.PhotoLibrary;
            //imag.mediaTypes = [kUTTypeImage];
            imag.allowsEditing = false
            self.presentViewController(imag, animated: true, completion: nil)
        }
   }

   func imagePickerController(picker: UIImagePickerController!, didFinishPickingImage image: UIImage!, editingInfo: NSDictionary!) {
        let selectedImage : UIImage = image
       //var tempImage:UIImage = editingInfo[UIImagePickerControllerOriginalImage] as UIImage
        img.image=selectedImage
        self.dismissViewControllerAnimated(true, completion: nil)    
   }
 }
24
Varsha Vijayvargiya

詳細

  • Xcode 10.2（10E125）、Swift 5

もっと

独自の写真ピッカーの作成方法

解決

import AVFoundation
import Photos

protocol ImagePickerDelegate: class {
    func imagePickerDelegate(canUseCamera accessIsAllowed: Bool, delegatedForm: ImagePicker)
    func imagePickerDelegate(canUseGallery accessIsAllowed: Bool, delegatedForm: ImagePicker)
    func imagePickerDelegate(didSelect image: UIImage, delegatedForm: ImagePicker)
    func imagePickerDelegate(didCancel delegatedForm: ImagePicker)
}

class ImagePicker: NSObject {

    private weak var controller: UIImagePickerController?
    weak var delegate: ImagePickerDelegate? = nil

    func present(parent viewController: UIViewController, sourceType: UIImagePickerController.SourceType) {
        let controller = UIImagePickerController()
        controller.delegate = self
        controller.sourceType = sourceType
        self.controller = controller
        DispatchQueue.main.async {
            viewController.present(controller, animated: true, completion: nil)
        }
    }

    func dismiss() { controller?.dismiss(animated: true, completion: nil) }
}

extension ImagePicker {

    private func showAlert(targetName: String, completion: @escaping (Bool)->()) {
        DispatchQueue.main.async { [weak self] in
            guard let self = self else { return }
            let alertVC = UIAlertController(title: "Access to the \(targetName)",
                                            message: "Please provide access to your \(targetName)",
                                            preferredStyle: .alert)
            alertVC.addAction(UIAlertAction(title: "Settings", style: .default, handler: { action in
                guard   let settingsUrl = URL(string: UIApplication.openSettingsURLString),
                    UIApplication.shared.canOpenURL(settingsUrl) else { completion(false); return }
                UIApplication.shared.open(settingsUrl, options: [:]) {
                    [weak self] _ in self?.showAlert(targetName: targetName, completion: completion)
                }
            }))
            alertVC.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: { _ in completion(false) }))
            UIApplication.shared.delegate?.window??.rootViewController?.present(alertVC, animated: true, completion: nil)
        }
    }

    func cameraAsscessRequest() {
        if AVCaptureDevice.authorizationStatus(for: .video) ==  .authorized {
            delegate?.imagePickerDelegate(canUseCamera: true, delegatedForm: self)
        } else {
            AVCaptureDevice.requestAccess(for: .video) { [weak self] granted in
                guard let self = self else { return }
                if granted {
                    self.delegate?.imagePickerDelegate(canUseCamera: granted, delegatedForm: self)
                } else {
                    self.showAlert(targetName: "camera") { self.delegate?.imagePickerDelegate(canUseCamera: $0, delegatedForm: self) }
                }
            }
        }
    }

    func photoGalleryAsscessRequest() {
        PHPhotoLibrary.requestAuthorization { [weak self] result in
            guard let self = self else { return }
            if result == .authorized {
                DispatchQueue.main.async { [weak self] in
                    guard let self = self else { return }
                    self.delegate?.imagePickerDelegate(canUseGallery: result == .authorized, delegatedForm: self)
                }
            } else {
                self.showAlert(targetName: "photo gallery") { self.delegate?.imagePickerDelegate(canUseCamera: $0, delegatedForm: self) }
            }
        }
    }
}

extension ImagePicker: UIImagePickerControllerDelegate, UINavigationControllerDelegate {

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        if let image = info[.editedImage] as? UIImage {
            delegate?.imagePickerDelegate(didSelect: image, delegatedForm: self)
            return
        }

        if let image = info[.originalImage] as? UIImage {
            delegate?.imagePickerDelegate(didSelect: image, delegatedForm: self)
        } else {
            print("Other source")
        }
    }

    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        delegate?.imagePickerDelegate(didCancel: self)
    }
}

完全な使用法

Info.plist

 <key>NSPhotoLibraryUsageDescription</key>
 <string>bla-bla-bla</string>
 <key>NSCameraUsageDescription</key>
 <string>bla-bla-bla</string>

ViewController（ソリューションコードの貼り付けを忘れないでください）

import UIKit

class ViewController: UIViewController {

    private lazy var imagePicker = ImagePicker()

    private weak var imageView: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()
        imagePicker.delegate = self

        navigationItem.leftBarButtonItem = UIBarButtonItem(title: "camera", style: .plain, target: self,
                                                           action: #selector(cameraButtonTapped))
        navigationItem.rightBarButtonItem = UIBarButtonItem(title: "photo", style: .plain, target: self,
                                                           action: #selector(photoButtonTapped))

        let imageView = UIImageView(frame: CGRect(x: 40, y: 80, width: 200, height: 200))
        imageView.backgroundColor = .lightGray
        view.addSubview(imageView)
        self.imageView = imageView
    }

    private func presentImagePicker(sourceType: UIImagePickerController.SourceType) {
        imagePicker.present(parent: self, sourceType: sourceType)
    }

    @objc func photoButtonTapped(_ sender: UIButton) { imagePicker.photoGalleryAsscessRequest() }
    @objc func cameraButtonTapped(_ sender: UIButton) { imagePicker.cameraAsscessRequest() }
}

extension ViewController: ImagePickerDelegate {

    func imagePickerDelegate(didSelect image: UIImage, delegatedForm: ImagePicker) {
        imageView.image = image
        imagePicker.dismiss()
    }

    func imagePickerDelegate(didCancel delegatedForm: ImagePicker) { imagePicker.dismiss() }

    func imagePickerDelegate(canUseGallery accessIsAllowed: Bool, delegatedForm: ImagePicker) {
        if accessIsAllowed { presentImagePicker(sourceType: .photoLibrary) }
    }

    func imagePickerDelegate(canUseCamera accessIsAllowed: Bool, delegatedForm: ImagePicker) {
        // works only on real device (crash on simulator)
        if accessIsAllowed { presentImagePicker(sourceType: .camera) }
    }
}

画像

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20
Vasily Bodnarchuk

Swift 4.2およびxcode 10func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any])少し変更します。

関数のヘッダーでinfoKey-Sectionが変更されます

didFinishPickingMediaWithInfo info: [String : Any]に

didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]

OriginalImageを取得するには、以下を呼び出す必要があります。

let image = info[UIImagePickerController.InfoKey.originalImage] as? UIImage または

let image = info[.originalImage] as? UIImage

他のinfoKeysを見つける here （editedImage、imageURLなど...）

9
andre_hold

これを試して：

func imagePickerController(picker: UIImagePickerController!, didFinishPickingMediaWithInfo info:NSDictionary!) {
    let tempImage = info[UIImagePickerControllerOriginalImage] as! UIImage
    imagePreview.image  = tempImage

または、?の代わりに!を使用することもできます。

4
Gaurav