Build a Simple Camera App Using UIImagePickerController

Ref :

記得要在info.plist 加入這兩個權限

http://www.techotopia.com/index.php/An_Example_Swift_iOS_8_iPhone_Camera_Application

ㄧ個imageview 和兩個 button

import UIKit

import AVFoundation

import MobileCoreServices

// 沒有加入  import MobileCoreServices, 就找不到   kUTTypeImage

class ViewController: UIViewController,UIImagePickerControllerDelegate,UINavigationControllerDelegate {

    

    

    @IBOutlet weak var imageView: UIImageView!

    var newMedia: Bool?

    

    

    @IBAction func takePhoto(_ sender: UIButton) {

        if UIImagePickerController.isSourceTypeAvailable(

            UIImagePickerControllerSourceType.camera) {

            

            let imagePicker = UIImagePickerController()

            

            imagePicker.delegate = self

            imagePicker.sourceType =

                UIImagePickerControllerSourceType.camera

            imagePicker.mediaTypes = [kUTTypeImage as String]

            imagePicker.allowsEditing = false

            

            self.present(imagePicker, animated: true,

                         completion: nil)

            newMedia = true

        }

        

    

    }

    

    @IBAction func selectPhoto(_ sender: UIButton) {

        

        if UIImagePickerController.isSourceTypeAvailable(

            UIImagePickerControllerSourceType.savedPhotosAlbum) {

            let imagePicker = UIImagePickerController()

            

            imagePicker.delegate = self

            imagePicker.sourceType =

                UIImagePickerControllerSourceType.photoLibrary

            imagePicker.mediaTypes = [kUTTypeImage as String]

            imagePicker.allowsEditing = false

            self.present(imagePicker, animated: true,

                         completion: nil)

            newMedia = false

        }

        

    }

    

    

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

        let mediaType = info[UIImagePickerControllerMediaType] as! NSString

        

        self.dismiss(animated: true, completion: nil)

        

        if mediaType.isEqual(to: kUTTypeImage as String) {

            let image = info[UIImagePickerControllerOriginalImage]

                as! UIImage

            

            imageView.image = image

            

            if (newMedia == true) {

                UIImageWriteToSavedPhotosAlbum(image, self,

                                               #selector(ViewController.image(image:didFinishSavingWithError:contextInfo:)), nil)

            } else if mediaType.isEqual(to: kUTTypeMovie as String) {

                // Code to support video here

            }

            

        }

    }

    func image(image: UIImage, didFinishSavingWithError error: NSErrorPointer, contextInfo:UnsafeRawPointer) {

        

        if error != nil {

            let alert = UIAlertController(title: "Save Failed",

                                          message: "Failed to save image",

                                          preferredStyle: UIAlertControllerStyle.alert)

            

            let cancelAction = UIAlertAction(title: "OK",

                                             style: .cancel, handler: nil)

            

            alert.addAction(cancelAction)

            self.present(alert, animated: true,

                         completion: nil)

        }

    }

    

    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {

        self.dismiss(animated: true, completion: nil)

    }

    

   

    

    

   

}