Month: June 2018

import UIKit
import AVFoundation

class ViewController: UIViewController {
    
    var captureSession = AVCaptureSession()
    var mainCamera: AVCaptureDevice?
    var innerCamera: AVCaptureDevice?
    var currentDevice: AVCaptureDevice?
    var photoOutput : AVCapturePhotoOutput?
    var cameraPreviewLayer : AVCaptureVideoPreviewLayer?
    

    override func viewDidLoad() {
        super.viewDidLoad()
        setupCaptureSession()
        setupDevice()
        setupInputOutput()
        setupPreviewLayer()
        captureSession.startRunning()
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

extension ViewController {
    func setupCaptureSession(){
        captureSession.sessionPreset = AVCaptureSession.Preset.photo
    }
    
    func setupDevice(){
        let deviceDiscoverySession = AVCaptureDevice.DiscoverySession(deviceTypes: [AVCaptureDevice.DeviceType.builtInWideAngleCamera], mediaType: AVMediaType.video, position: AVCaptureDevice.Position.unspecified)
        let devices = deviceDiscoverySession.devices
        
        for device in devices {
            if device.position == AVCaptureDevice.Position.back {
                mainCamera = device
            } else if device.position == AVCaptureDevice.Position.front {
                innerCamera = device
            }
        }
        currentDevice = mainCamera
    }
    func setupInputOutput(){
        do {
            let captureDeviceInput = try AVCaptureDeviceInput(device: currentDevice!)
            captureSession.addInput(captureDeviceInput)
            photoOutput = AVCapturePhotoOutput()
            photoOutput!.setPreparedPhotoSettingsArray([AVCapturePhotoSettings(format: [AVVideoCodecKey : AVVideoCodecType.jpeg])], completionHandler: nil)
            captureSession.addOutput(photoOutput!)
        } catch {
            print(error)
        }
    }
    func setupPreviewLayer(){
        self.cameraPreviewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
        self.cameraPreviewLayer?.videoGravity = AVLayerVideoGravity.resizeAspectFill
        self.cameraPreviewLayer?.connection?.videoOrientation = AVCaptureVideoOrientation.portrait
        self.cameraPreviewLayer?.frame = view.frame
        self.view.layer.insertSublayer(self.cameraPreviewLayer!, at: 0)
    }
}

Info.plistで設定を加える。
Privacy – Camera Usage Description
Privacy – Photo Library Usage Description

retakeとuse photoが出るが、わからん。

あ、info.plistは、Photo Library Usage Descriptionではなく、 Photo Library Additions Usage Descriptionですね。
Privacy – Photo Library Additions Usage Description
これで、簡単に写真が取れるようになりました！

camera機能は用途が多そうなので、もう少し深掘りしたいと思います。

import UIKit

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate  {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }
    override func viewDidAppear(_ animated: Bool) {
        let picker = UIImagePickerController()
        picker.sourceType = .camera
        picker.delegate = self
        
        present(picker, animated: true, completion: nil)
    }
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
        print(#function)
        // print(info[UIImagePickerControllerMediaType]!)
        let image = info[UIImagePickerControllerOriginalImage] as! UIImage
        // 撮影した画像をカメラロールに保存
        UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil)
    }

    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        print(#function)
    }
}

console　// なに?
This app has crashed because it attempted to access privacy-sensitive data without a usage description. The app’s Info.plist must contain an NSCameraUsageDescription key with a string value explaining to the user how the app uses this data.

projectの下に、ケツメイシの涙のmp3を置きます。

storyboardに、buttonを配置し、autletとactionで接続します。

コーディングしていきます。

var audioPlayer:AVAudioPlayer!

    @IBOutlet weak var button: UIButton!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let audioPath = Bundle.main.path(forResource: "namida", ofType:"mp3")!
        let audioUrl = URL(fileURLWithPath: audioPath)
        
        var audioError:NSError?
        do {
            audioPlayer = try AVAudioPlayer(contentsOf: audioUrl)
        } catch let error as NSError {
            audioError = error
            audioPlayer = nil
        }
        
        if let error = audioError {
            print("Error \(error.localizedDescription)")
        }
        
        audioPlayer.delegate = self
        audioPlayer.prepareToPlay()
        
    }
    
    @IBAction func buttonTapped(_ sender: Any) {
        if ( audioPlayer.isPlaying ){
            audioPlayer.stop()
            button.setTitle("Stop", for: UIControlState())
        }
        else {
            audioPlayer.play()
            button.setTitle("Play", for: UIControlState())
        }
    }

普通に再生できました。

ちょっとハイペースですが、次はカメラいきましょう。
どうやらカメラもAVFoundationのようですね。

override func viewDidLoad() {
        super.viewDidLoad()
        
        let location:CLLocationCoordinate2D = CLLocationCoordinate2DMake(35.68154,139.752498)
        
        mapView.setCenter(location, animated:true)
        
        var region:MKCoordinateRegion = mapView.region
        region.center = location
        region.span.latitudeDelta = 0.02
        region.span.longitudeDelta = 0.02
        
        mapView.setRegion(region,animated:true)
        mapView.mapType = MKMapType.hybrid
        // Do any additional setup after loading the view, typically from a nib.
    }

あれ、これ凄くね？　MKMapType.hybridとか、Google Map APIそっくりじゃん。Google Map API作った人が関わってるっぽいな。Google mapよりコード量は少ない。

でもこれ、latitude, longitudenの値を取得しないとダメですな。

0.02を0.01にすると、
region.span.latitudeDelta = 0.01
region.span.longitudeDelta = 0.01

大きくなりましたね。

setValueして、saveで保存する。

let appDelegate = UIApplication.shared.delegate as! AppDelegate
        let context = appDelegate.persistentContainer.viewContext
        let entity = NSEntityDescription.entity(forEntityName: "Users", in: context)
        let newUser = NSManagedObject(entity: entity!, insertInto: context)
        
        newUser.setValue("Louis Miguel", forKey: "username")
        newUser.setValue("asdf", forKey: "password")
        newUser.setValue("1", forKey: "age")
        
        do {
            try context.save()
        } catch {
            print("Failed saving")
        }

ViewController.swift

override func viewDidLoad() {
        super.viewDidLoad()
        
        let appDelegate = UIApplication.shared.delegate as! AppDelegate
        let context = appDelegate.persistentContainer.viewContext
        let entity = NSEntityDescription.entity(forEntityName: "Users", in: context)
        let newUser = NSManagedObject(entity: entity!, insertInto: context)
        // Do any additional setup after loading the view, typically from a nib.
    }

よくみたら、import UIKitだけでした。。。。。 coredataもimportします。

import UIKit
import CoreData

エラーが消えました。何だよ！