llama 3 70B sample

import UIKit
import AVFoundation

class VideoPlayerViewController: UIViewController {
    // Video player view
    let playerView = UIView()

    // AVPlayer instance
    var player: AVPlayer?

    // Video URL
    var videoURL: URL?

    // Buttons and controls
    let playPauseButton = UIButton(type: .system)
    let stopButton = UIButton(type: .system)
    let rewindButton = UIButton(type: .system)
    let fastForwardButton = UIButton(type: .system)
    let volumeSlider = UISlider()
    let timeLabel = UILabel()
    let currentTimeLabel = UILabel()

    // Video playback state
    var isPlaying = false

    override func viewDidLoad() {
        super.viewDidLoad()

        // Set up player view
        playerView.translatesAutoresizingMaskIntoConstraints = false
        view.addSubview(playerView)
        NSLayoutConstraint.activate([
            playerView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
            playerView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
            playerView.topAnchor.constraint(equalTo: view.topAnchor),
            playerView.bottomAnchor.constraint(equalTo: view.bottomAnchor)
        ])

        // Set up buttons and controls
        playPauseButton.setTitle("Play", for: .normal)
        playPauseButton.addTarget(self, action: #selector(playPauseButtonTapped), for: .touchUpInside)
        stopButton.setTitle("Stop", for: .normal)
        stopButton.addTarget(self, action: #selector(stopButtonTapped), for: .touchUpInside)
        rewindButton.setTitle("Rewind", for: .normal)
        rewindButton.addTarget(self, action: #selector(rewindButtonTapped), for: .touchUpInside)
        fastForwardButton.setTitle("Fast Forward", for: .normal)
        fastForwardButton.addTarget(self, action: #selector(fastForwardButtonTapped), for:
.touchUpInside)

        volumeSlider.minimumValue = 0
        volumeSlider.maximumValue = 1
        volumeSlider.value = 0.5
        volumeSlider.addTarget(self, action: #selector(volumeSliderValueChanged), for: .valueChanged)

        timeLabel.text = "00:00"
        currentTimeLabel.text = "00:00"

        // Add buttons and controls to the view
        let buttonStackView = UIStackView(arrangedSubviews: [playPauseButton, stopButton, rewindButton,
fastForwardButton])
        buttonStackView.axis = .horizontal
        buttonStackView.distribution = .fillEqually
        buttonStackView.spacing = 10

        let controlStackView = UIStackView(arrangedSubviews: [volumeSlider, timeLabel,
currentTimeLabel])
        controlStackView.axis = .vertical
        controlStackView.distribution = .fillProportionally
        controlStackView.spacing = 10

        view.addSubview(buttonStackView)
        view.addSubview(controlStackView)

        NSLayoutConstraint.activate([
            buttonStackView.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 20),
            buttonStackView.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -20),
            buttonStackView.topAnchor.constraint(equalTo: playerView.bottomAnchor, constant: 20),

            controlStackView.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 20),
            controlStackView.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -20),
            controlStackView.topAnchor.constraint(equalTo: buttonStackView.bottomAnchor, constant: 10)
        ])
    }

    // Play/pause button tapped
    @objc func playPauseButtonTapped() {
        if isPlaying {
            player?.pause()
            playPauseButton.setTitle("Play", for: .normal)
            isPlaying = false
        } else {
            player?.play()
            playPauseButton.setTitle("Pause", for: .normal)
            isPlaying = true
        }
    }

    // Stop button tapped
    @objc func stopButtonTapped() {
        player?.stop()
        player?.seek(to: CMTime.zero)
        currentTimeLabel.text = "00:00"
        isPlaying = false
    }

    // Rewind button tapped
    @objc func rewindButtonTapped() {
        guard let player = player else { return }
        let currentTime = player.currentTime()
        let newTime = currentTime - 10
        if newTime < 0 {
            player.seek(to: CMTime.zero)
        } else {
            player.seek(to: newTime)
        }
    }

    // Fast forward button tapped
    @objc func fastForwardButtonTapped() {
        guard let player = player else { return }
        let currentTime = player.currentTime()
        let duration = player.currentItem?.duration
        let newTime = min(currentTime + 10, duration)
        player.seek(to: newTime)
    }

    // Volume slider value changed
    @objc func volumeSliderValueChanged() {
        guard let player = player else { return }
        player.volume = volumeSlider.value
    }

    // Set up video playback
    func setupVideoPlayback(url: URL) {
        videoURL = url
        player = AVPlayer(url: videoURL)

        // Create a player layer and add it to the player view
        let playerLayer = AVPlayerLayer(player: player)
        playerLayer.frame = playerView.bounds
        playerView.layer.addSublayer(playerLayer)

        // Add observers for playback state changes
        NotificationCenter.default.addObserver(self, selector: #selector(playbackStateChanged), name:
.AVPlayerItemDidPlayToEndTime, object: player?.currentItem)
    }

    // Playback state changed (e.g. video ended)
    @objc func playbackStateChanged() {
        stopButtonTapped()
    }
}

This `UIViewController` has the following features:

* A `UIView` to display the video
* An `AVPlayer` instance to play the video
* Buttons for playing/pausing, stopping, rewinding, and fast forwarding
* A volume slider to control the audio level
* Labels to display the current time and duration of the video

To use this view controller, simply create an instance of it and call the `setupVideoPlayback` method
with a valid `URL` for the video. For example:
```swift
let videoViewController = VideoPlayerViewController()
videoViewController.setupVideoPlayback(url: URL(string: "https://example.com/video.mp4")!)
```
Note that this is just an example implementation, and you may want to customize it to fit your specific
needs (e.g. add error handling, display video thumbnails, etc.).