AVPlayer存在于AVFoundation中，它更加接近于底层，可以进行自定义，所以也更加灵活。AVPlayer本身并不能显示视频，而且它也不像MPMoviePlayerController有一个view属性。如果AVPlayer要显示必须创建一个播放器层AVPlayerLayer用于展示，播放器层继承于CALayer，有了AVPlayerLayer之添加到控制器视图的layer中即可。
最近实现一个基本的AVPlayer播放器，代码如下：
自定义一个View，播放器的UI部分主要在这里实现
<pre>import UIKit
import AVFoundation
protocol WXPlayerViewDelegate: NSObjectProtocol {
func wxplayer(playerView: WXPlayerView,slider: UISlider)
func wxplayer(playerView:WXPlayerView,playAndPause playBtn:UIButton)
}
class WXPlayerView: UIView {
var playerLayer: AVPlayerLayer!
var timeLabel: UILabel!
var slider: UISlider!
var progressView:UIProgressView!
var playBtn:UIButton!
var sliding = false
var playing = true
weak var delegate: WXPlayerViewDelegate?
init(){
super.init(frame: CGRect.zero)
self.initView()
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func initView()
{
self.playerLayer = AVPlayerLayer()
self.layer.addSublayer( self.playerLayer)
self.timeLabel = UILabel()
// self.timeLabel.backgroundColor = UIColor.red
self.timeLabel.textColor = UIColor.white
self.timeLabel.font = UIFont.systemFont(ofSize: 14)
self.addSubview(self.timeLabel)
self.slider = UISlider()
self.addSubview(self.slider)
self.slider.minimumValue = 0
self.slider.maximumValue = 1
self.slider.value = 0
self.slider.maximumTrackTintColor = UIColor.clear
self.slider.minimumTrackTintColor = UIColor.white
self.slider.setThumbImage(UIImage(named:"ic_shipinjindu_nor"), for: .normal)
// 按下的时候
self.slider.addTarget(self, action: #selector(self.sliderTouchDown), for: .touchDown)
// 弹起的时候
self.slider.addTarget(self, action: #selector(self.sliderTouchUpOut), for: .touchUpOutside)
self.slider.addTarget(self, action: #selector(self.sliderTouchUpOut), for: .touchUpInside)
self.slider.addTarget(self, action: #selector(self.sliderTouchUpOut), for: .touchCancel)
self.progressView = UIProgressView()
self.progressView.backgroundColor = UIColor.lightGray
self.insertSubview(self.progressView, belowSubview: self.slider)
self.progressView.tintColor = UIColor.red
self.progressView.progress = 0
self.playBtn = UIButton()
self.playBtn.setImage(UIImage(named:"videopause_control_nor"), for: .normal)
self.addSubview(self.playBtn)
self.playBtn.addTarget(self, action: #selector(self.playBtnAction), for: .touchUpInside)
}
func sliderTouchDown(){
self.sliding = true
}
func sliderTouchUpOut(){
// 代理处理
delegate?.wxplayer(playerView: self, slider: self.slider)
}
func updateUI(timeStr: String) {
self.timeLabel.text = timeStr
self.timeLabel.sizeToFit()
self.setNeedsLayout()
}
func playBtnAction()
{
self.playing = !self.playing // 改变状态
// 根据状态设定图片
if playing {
playBtn.setImage(UIImage(named: "videopause_control_nor"), for: .normal)
}else{
playBtn.setImage(UIImage(named: "videoplay_control_nor"), for: .normal)
}
// 代理方法
delegate?.wxplayer(playerView: self, playAndPause: self.playBtn)
}
override func layoutSubviews() {
super.layoutSubviews()
self.playerLayer.frame = self.bounds
self.timeLabel.frame.origin.x = self.frame.width - self.timeLabel.frame.width - 5
self.timeLabel.frame.origin.y = self.frame.height - self.timeLabel.frame.height - 50
self.slider.frame.origin.x = 40
self.slider.frame.origin.y = self.frame.height - 75
self.slider.frame.size.width = self.frame.width - 140
self.progressView.frame.origin.x = 42
self.progressView.frame.origin.y = self.frame.height - 59
self.progressView.frame.size.width = self.frame.width - 142
self.playBtn.frame = CGRect(x: 5, y: self.frame.height - 75, width: 30, height: 30)
}
}
</pre>
接下来是VC中的代码，主要是实现逻辑部分
<pre>import UIKit
import AVFoundation
extension ViewController: WXPlayerViewDelegate{
func wxplayer(playerView: WXPlayerView, slider: UISlider) {
if self.avplayer.status == AVPlayerStatus.readyToPlay{
let duration = slider.value * Float(CMTimeGetSeconds(self.avplayer.currentItem!.duration))
let seekTime = CMTimeMake(Int64(duration), 1)
self.avplayer.seek(to: seekTime, completionHandler: { (b) in
playerView.sliding = false
})
}
}
func wxplayer(playerView: WXPlayerView, playAndPause playBtn: UIButton) {
if !playerView.playing{
self.avplayer.pause()
}else{
if self.avplayer.status == AVPlayerStatus.readyToPlay{
self.avplayer.play()
}
}
}
}
class ViewController: UIViewController {
var playerView: WXPlayerView!
var playerItem: AVPlayerItem!
var avplayer: AVPlayer!
var playerLayer: AVPlayerLayer!
var link: CADisplayLink!
override func viewDidLoad() {
super.viewDidLoad()
self.initPlayer()
self.link = CADisplayLink(target: self, selector: #selector(self.update))
self.link.add(to: .main, forMode: RunLoopMode.defaultRunLoopMode)
}
deinit {
self.playerItem.removeObserver(self, forKeyPath: "loadedTimeRanges")
self.playerItem.removeObserver(self, forKeyPath: "status")
}
func initPlayer()
{
let url = URL(string: "http://vt1.doubanio.com/201609291737/4af83e686c0432c0dbd3c320f14eba6f/view/movie/M/302030039.mp4")
self.playerItem = AVPlayerItem(url: url!)
self.playerItem.addObserver(self, forKeyPath: "loadedTimeRanges", options: .new, context: nil)
self.playerItem.addObserver(self, forKeyPath: "status", options: .new, context: nil)
self.avplayer = AVPlayer(playerItem: self.playerItem)
self.playerLayer = AVPlayerLayer(player: self.avplayer)
self.playerLayer.videoGravity = AVLayerVideoGravityResizeAspect
self.playerLayer.contentsScale = UIScreen.main.scale
self.view.layer.addSublayer( self.playerLayer)
self.playerView = WXPlayerView()
self.playerView.delegate = self
self.playerView.frame = CGRect(x: 0, y: 20, width: self.view.frame.width, height: 300)
self.view.addSubview(self.playerView)
self.playerView.playerLayer = self.playerLayer
self.playerView.layer.insertSublayer(self.playerLayer, at: 0)
}
func update(){
//暂停的时候
if !self.playerView.playing{
return
}
let currentTime = CMTimeGetSeconds(self.avplayer.currentTime())
let totalTime = TimeInterval(self.playerItem.duration.value) / TimeInterval(self.playerItem.duration.timescale)
let timeStr = "\(self.formatPlayTime(secounds: currentTime))/\(self.formatPlayTime(secounds: totalTime))"
self.playerView.updateUI(timeStr: timeStr)
if !self.playerView.sliding{
// 播放进度
self.playerView.slider.value = Float(currentTime/totalTime)
}
}
override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
if keyPath == "loadedTimeRanges"{
// 通过监听AVPlayerItem的"loadedTimeRanges"，可以实时知道当前视频的进度缓冲
let loadedTime = avalableDurationWithplayerItem()
let totalTime = CMTimeGetSeconds(playerItem.duration)
let percent = loadedTime/totalTime // 计算出比例
// 改变进度条
self.playerView.progressView.progress = Float(percent)
}else if keyPath == "status"{
if self.playerItem.status == AVPlayerItemStatus.readyToPlay{
self.avplayer.play()
}else
{
print("加载异常")
}
}
}
func formatPlayTime(secounds: TimeInterval) -> String{
if secounds.isNaN{
return "00:00"
}
let min = Int(secounds / 60)
let sec = Int(secounds.truncatingRemainder(dividingBy: 60) )
return String(format: "%02d:%02d", min,sec)
}
// 计算当前缓冲进度
func avalableDurationWithplayerItem() -> TimeInterval{
guard let loadedTimeRanges = self.avplayer.currentItem?.loadedTimeRanges,let first = loadedTimeRanges.first else {fatalError()}
let timeRange = first.timeRangeValue
let startSeconds = CMTimeGetSeconds(timeRange.start)
let durationSecound = CMTimeGetSeconds(timeRange.duration)
let result = startSeconds + durationSecound
return result
}
}
</pre>
实现后的效果图
1.png
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