Choosing and taking part in movies in Swift

Let’s decide some movies!

When you bear in mind my earlier tutorial about picture choosing in iOS, then you understand that I already made fairly a reusable picker class constructed on high of UIKit. If you do not know how the UIImagePickerController class works, please learn that tutorial first as a result of it offers you an amazing overview concerning the fundamentals.

To start with you will want so as to add some keys into your Information.plist file, since you’d wish to entry some private information. You realize: privateness is essential. 🤫

<key>NSCameraUsageDescription</key>
<string>This app needs to take photos & movies.</string>
<key>NSPhotoLibraryUsageDescription</key>
<string>This app needs to make use of your image & video library.</string>
<key>NSMicrophoneUsageDescription</key>
<string>This app needs to file sound.</string>
<key>NSPhotoLibraryAddUsageDescription</key>
<string>This app needs to avoid wasting photos & movies to your library.</string>

Since we’re not going to seize silent movies we even have so as to add the Privateness – Microphone Utilization Description subject. Prepared, set, motion! 🎬

I am not going to mislead you, however I used to be a little bit bit lazy this time, so our VideoPicker class will likely be 90% the identical as our ImagePicker class was. You can also make an summary class, no matter, I am going to present you the ultimate code, then we will discuss concerning the variations. 😅

import UIKit

public protocol VideoPickerDelegate: class {
    func didSelect(url: URL?)
}

open class VideoPicker: NSObject {

    non-public let pickerController: UIImagePickerController
    non-public weak var presentationController: UIViewController?
    non-public weak var delegate: VideoPickerDelegate?

    public init(presentationController: UIViewController, delegate: VideoPickerDelegate) {
        self.pickerController = UIImagePickerController()

        tremendous.init()

        self.presentationController = presentationController
        self.delegate = delegate

        self.pickerController.delegate = self
        self.pickerController.allowsEditing = true
        self.pickerController.mediaTypes = ["public.movie"]
        self.pickerController.videoQuality = .typeHigh
    }

    non-public func motion(for sort: UIImagePickerController.SourceType, title: String) -> UIAlertAction? {
        guard UIImagePickerController.isSourceTypeAvailable(sort) else {
            return nil
        }

        return UIAlertAction(title: title, fashion: .default) { [unowned self] _ in
            self.pickerController.sourceType = sort
            self.presentationController?.current(self.pickerController, animated: true)
        }
    }

    public func current(from sourceView: UIView) {

        let alertController = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)

        if let motion = self.motion(for: .digicam, title: "Take video") {
            alertController.addAction(motion)
        }
        if let motion = self.motion(for: .savedPhotosAlbum, title: "Digital camera roll") {
            alertController.addAction(motion)
        }
        if let motion = self.motion(for: .photoLibrary, title: "Video library") {
            alertController.addAction(motion)
        }

        alertController.addAction(UIAlertAction(title: "Cancel", fashion: .cancel, handler: nil))

        if UIDevice.present.userInterfaceIdiom == .pad {
            alertController.popoverPresentationController?.sourceView = sourceView
            alertController.popoverPresentationController?.sourceRect = sourceView.bounds
            alertController.popoverPresentationController?.permittedArrowDirections = [.down, .up]
        }

        self.presentationController?.current(alertController, animated: true)
    }

    non-public func pickerController(_ controller: UIImagePickerController, didSelect url: URL?) {
        controller.dismiss(animated: true, completion: nil)

        self.delegate?.didSelect(url: url)
    }
}

extension VideoPicker: UIImagePickerControllerDelegate {

    public func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        self.pickerController(picker, didSelect: nil)
    }

    public func imagePickerController(_ picker: UIImagePickerController,
                                      didFinishPickingMediaWithInfo information: [UIImagePickerController.InfoKey: Any]) {

        guard let url = information[.mediaURL] as? URL else {
            return self.pickerController(picker, didSelect: nil)
        }


        self.pickerController(picker, didSelect: url)
    }
}

extension VideoPicker: UINavigationControllerDelegate {

}

There are only a few small that adjustments. The primary one is the mediaTypes property, you should use the “public.film” worth this time. Additionally it is best to set the videoQuality property on the pickerController, as a result of 4k is all the time higher than 320. 🤪

The delegate is the very last thing that modified a little bit bit. After the picker end the job you may get the .mediaURL property, which is a URL to get your media file (a.ok.a. the captured / chosen video file). If a brand new file was recorded you may also put it aside to the media library, that is simply two strains of additional code.

Congrats, play-back time! 📹

Enjoying video recordsdata utilizing AVPlayer & UIView

Is not it nice when a webpage has some properly themed video within the background of the header? Nicely, you’ll be able to have the very same factor in iOS by utilizing AVFoundation, UIKit and a few low-level layer magic. Don’t fret it is not that tough. 😬

You need to use a daily UIView subclass, then change its default layer with an AVPlayerLayer. It will let you play movies instantly within the view. Additionally an AVPlayer is only a easy controller object that may handle the playback and timing of a media file.

The toughest half was checking the standing adjustments of the media file. For instance after I first tried to file a brand new video the payback of the participant view always stopped after a second. I needed to seek for solutions, as a result of I am not an AVFoundation professional in any respect, but it surely turned out that it is best to look ahead to the speed property, as a result of the system is making an attempt to buffer the video and that may trigger some issues.

Anyway I used to be capable of put collectively a reasonably good VideoView with some good further options like always looping the video or selecting between the fill / match facet content material modes. I am not telling you that it is a 100% bulletproof resolution, but it surely’s a great start line, plus it is greater than sufficient in some circumstances. 👻

import UIKit
import AVFoundation

open class VideoView: UIView {

    public enum Repeat {
        case as soon as
        case loop
    }

    override open class var layerClass: AnyClass {
        return AVPlayerLayer.self
    }

    non-public var playerLayer: AVPlayerLayer {
        return self.layer as! AVPlayerLayer
    }

    public var participant: AVPlayer? {
        get {
            self.playerLayer.participant
        }
        set {
            self.playerLayer.participant = newValue
        }
    }


    open override var contentMode: UIView.ContentMode {
        didSet {
            change self.contentMode {
            case .scaleAspectFit:
                self.playerLayer.videoGravity = .resizeAspect
            case .scaleAspectFill:
                self.playerLayer.videoGravity = .resizeAspectFill
            default:
                self.playerLayer.videoGravity = .resize
            }
        }
    }

    public var `repeat`: Repeat = .as soon as

    public var url: URL? {
        didSet {
            guard let url = self.url else {
                self.teardown()
                return
            }
            self.setup(url: url)
        }
    }

    @obtainable(*, unavailable)
    override init(body: CGRect) {
        tremendous.init(body: body)

        self.initialize()
    }

    @obtainable(*, unavailable)
    public required init?(coder aDecoder: NSCoder) {
        tremendous.init(coder: aDecoder)

        self.initialize()
    }

    public init() {
        tremendous.init(body: .zero)

        self.translatesAutoresizingMaskIntoConstraints = false

        self.initialize()
    }

    open func initialize() {

    }

    deinit {
        self.teardown()
    }


    non-public func setup(url: URL) {

        self.participant = AVPlayer(playerItem: AVPlayerItem(url: url))

        self.participant?.currentItem?.addObserver(self,
                                              forKeyPath: "standing",
                                              choices: [.old, .new],
                                              context: nil)

        self.participant?.addObserver(self, forKeyPath: "fee", choices: [.old, .new], context: nil)


        NotificationCenter.default.addObserver(self,
                                               selector: #selector(self.itemDidPlayToEndTime(_:)),
                                               identify: .AVPlayerItemDidPlayToEndTime,
                                               object: self.participant?.currentItem)

        NotificationCenter.default.addObserver(self,
                                               selector: #selector(self.itemFailedToPlayToEndTime(_:)),
                                               identify: .AVPlayerItemFailedToPlayToEndTime,
                                               object: self.participant?.currentItem)
    }

    non-public func teardown() {
        self.participant?.pause()

        self.participant?.currentItem?.removeObserver(self, forKeyPath: "standing")

        self.participant?.removeObserver(self, forKeyPath: "fee")

        NotificationCenter.default.removeObserver(self,
                                                  identify: .AVPlayerItemDidPlayToEndTime,
                                                  object: self.participant?.currentItem)

        NotificationCenter.default.removeObserver(self,
                                                  identify: .AVPlayerItemFailedToPlayToEndTime,
                                                  object: self.participant?.currentItem)

        self.participant = nil
    }



    @objc func itemDidPlayToEndTime(_ notification: NSNotification) {
        guard self.repeat == .loop else {
            return
        }
        self.participant?.search(to: .zero)
        self.participant?.play()
    }

    @objc func itemFailedToPlayToEndTime(_ notification: NSNotification) {
        self.teardown()
    }


    open override func observeValue(forKeyPath keyPath: String?,
                                          of object: Any?,
                                          change: [NSKeyValueChangeKey : Any]?,
                                          context: UnsafeMutableRawPointer?) {
        if keyPath == "standing", let standing = self.participant?.currentItem?.standing, standing == .failed {
            self.teardown()
        }

        if
            keyPath == "fee",
            let participant = self.participant,
            participant.fee == 0,
            let merchandise = participant.currentItem,
            !merchandise.isPlaybackBufferEmpty,
            CMTimeGetSeconds(merchandise.period) != CMTimeGetSeconds(participant.currentTime())
        {
            self.participant?.play()
        }
    }
}

I made a pattern mission for you and truthfully my view controller is straightforward as f.ck. It demonstrates each the picture choosing and the video capturing capabilities. Be at liberty to obtain it from The.Swift.Dev tutorials repository, it is referred to as Pickers.