簡單介紹一下，AVPlayer是基于AVFoundation框架的一個(gè)類，很接近底層，靈活性強(qiáng)，方便自定義各種需求，使用之前需要先導(dǎo)入#import <AVKit/AVKit.h>

這個(gè)簡易播放器非常簡單，是我拿了練手玩的，功能只包括播放、暫停、滑動(dòng)播放、顯示緩沖進(jìn)度。

下面開始解釋實(shí)現(xiàn)思路，很簡單的
1、我想要一個(gè)可以播放url地址的播放器
2、這個(gè)播放器，我需要顯示網(wǎng)絡(luò)狀態(tài)
3、除了播放、暫停按鈕、可拖拽的進(jìn)度條、顯示當(dāng)前播放時(shí)間和視頻總時(shí)長以外，我還想要一個(gè)顯示緩沖的進(jìn)度條

好，我的需求就這么簡單，我就是想要自己寫一個(gè)這樣的播放器，至于其他的更復(fù)雜更好的用戶體驗(yàn)的功能，暫時(shí)不考慮。目標(biāo)明確了，開工。

1、工具條

這個(gè)工具條上面要包括：
1、播放（暫停）按鈕的UIButton
2、可以拖拽的進(jìn)度條UISlider
3、顯示當(dāng)前播放時(shí)間和顯示視頻總時(shí)長的UILabel
4、顯示緩沖進(jìn)度的UIProgressView

首先創(chuàng)建一個(gè)UIView，生成.h和.m文件，開始添加我需要的這些東西，開始之前我考慮到播放和暫停按鈕我是用的一個(gè)Button，所以在切換狀態(tài)的時(shí)候，我還要對(duì)應(yīng)著改變按鈕的icon，所以我為了方便，在工具條這個(gè)View里添加了一個(gè)Delegate，為了改變icon的同時(shí)，把狀態(tài)傳遞出去，所以.h文件我這樣寫，代碼如下：

#import <UIKit/UIKit.h>

NS_ASSUME_NONNULL_BEGIN

@protocol VideoPlayerToolsViewDelegate <NSObject>

-(void)playButtonWithStates:(BOOL)state;

@end

@interface VideoPlayerToolsView : UIView

@property (nonatomic, strong) UIButton *bCheck;//播放暫停按鈕
@property (nonatomic, strong) UISlider *progressSr;//進(jìn)度條
@property (nonatomic, strong) UIProgressView *bufferPV;//緩沖條
@property (nonatomic, strong) UILabel *lTime;//時(shí)間進(jìn)度和總時(shí)長

@property (nonatomic, weak) id<VideoPlayerToolsViewDelegate> delegate;

@end

NS_ASSUME_NONNULL_END

.m文件

#import "VideoPlayerToolsView.h"

@interface VideoPlayerToolsView ()

@end

@implementation VideoPlayerToolsView

-(instancetype)initWithFrame:(CGRect)frame{
    
    self = [super initWithFrame:frame];
    if (self) {
        self.backgroundColor = [UIColor colorWithWhite:0 alpha:0.5];
        [self createUI];//創(chuàng)建UI
    }
    return self;
    
}

#pragma mark - 創(chuàng)建UI
-(void)createUI{
    [self addSubview:self.bCheck];//開始暫停按鈕
    [self addSubview:self.bufferPV];//緩沖條
    [self addSubview:self.progressSr];//創(chuàng)建進(jìn)度條
    [self addSubview:self.lTime];//視頻時(shí)間
}

#pragma mark - 視頻時(shí)間
-(UILabel *)lTime{
    
    if (!_lTime) {
        _lTime = [UILabel new];
        _lTime.frame = CGRectMake(CGRectGetMaxX(_progressSr.frame) + 20, 0, self.frame.size.width - CGRectGetWidth(_progressSr.frame) - 40 - CGRectGetWidth(_bCheck.frame), self.frame.size.height);
        _lTime.text = @"00:00/00:00";
        _lTime.textColor = [UIColor whiteColor];
        _lTime.textAlignment = NSTextAlignmentCenter;
        _lTime.font = [UIFont systemFontOfSize:12];
        _lTime.adjustsFontSizeToFitWidth = YES;
    }
    return _lTime;
    
}

#pragma mark - 創(chuàng)建進(jìn)度條
-(UISlider *)progressSr{
    
    if (!_progressSr) {
        _progressSr = [UISlider new];
        _progressSr.frame = CGRectMake(CGRectGetMinX(_bufferPV.frame) - 2, CGRectGetMidY(_bufferPV.frame) - 10, CGRectGetWidth(_bufferPV.frame) - 4, 20);
        _progressSr.maximumTrackTintColor = [UIColor clearColor];
        _progressSr.minimumTrackTintColor = [UIColor whiteColor];
        [_progressSr setThumbImage:[UIImage imageNamed:@"point"] forState:0];
    }
    return _progressSr;
    
}

#pragma mark - 緩沖條
-(UIProgressView *)bufferPV{
    
    if (!_bufferPV) {
        _bufferPV = [UIProgressView new];
        _bufferPV.frame = CGRectMake(CGRectGetMaxX(_bCheck.frame) + 20, CGRectGetMidY(_bCheck.frame) - 2, 200, 4);
        _bufferPV.trackTintColor = [UIColor grayColor];
        _bufferPV.progressTintColor = [UIColor cyanColor];
    }
    return _bufferPV;
    
}

#pragma mark - 開始暫停按鈕
-(UIButton *)bCheck{
    
    if (!_bCheck) {
        _bCheck = [UIButton new];
        _bCheck.frame = CGRectMake(0, 0, self.frame.size.height, self.frame.size.height);
        [_bCheck setImage:[UIImage imageNamed:@"pause"] forState:0];
        [_bCheck addTarget:self action:@selector(btnCheckSelect:) forControlEvents:UIControlEventTouchUpInside];
    }
    return _bCheck;
    
}

-(void)btnCheckSelect:(UIButton *)sender{
    
    sender.selected = !sender.isSelected;
    
    if (sender.selected) {
        [_bCheck setImage:[UIImage imageNamed:@"play"] forState:0];
    }else{
        [_bCheck setImage:[UIImage imageNamed:@"pause"] forState:0];
    }
    
    if ([_delegate respondsToSelector:@selector(playButtonWithStates:)]) {
        [_delegate playButtonWithStates:sender.selected];
    }
    
}

@end

隨便把這個(gè)工具條加載到任一一個(gè)頁面看下效果，沒錯(cuò)，目前看來就是我要的樣子，先放著，后面再調(diào)用。

2、網(wǎng)絡(luò)狀態(tài)監(jiān)聽器

這個(gè)網(wǎng)絡(luò)監(jiān)聽器是網(wǎng)上找到的，本來想把原文地址留下來的，結(jié)果忘記了，在這里表示抱歉，至于這個(gè)工具怎么實(shí)現(xiàn)的，實(shí)話實(shí)說，我看不懂，我就知道它就是我想要的東西，是不是很尷尬……那也沒辦法，能力有限！這個(gè)工具的使用我單獨(dú)拿出去寫了個(gè)文章，這里不再重復(fù)黏貼代碼了。

3、AVPlayer播放器

這里是重頭戲了，首先，要知道AVPlayer是怎么用的。
AVPlayer是個(gè)播放器，但是呢，它又不能直接播放視頻，它需要和AVPlayerLayer配合著使用，并且需要把AVPlayerLayer添加到視圖的layer上才行，比如：[self.layer addSublayer:self.playerLayer];。

AVPlayer加載視頻地址的方式是什么呢？我得需要知道，查看api，control+command+鼠標(biāo)左鍵，進(jìn)去瞅瞅，發(fā)現(xiàn)系統(tǒng)有提供以下幾種方式：

+ (instancetype)playerWithURL:(NSURL *)URL;
+ (instancetype)playerWithPlayerItem:(nullable AVPlayerItem *)item;
- (instancetype)initWithURL:(NSURL *)URL;
- (instancetype)initWithPlayerItem:(nullable AVPlayerItem *)item;

那么問題來了，上面的四種方法里面有兩個(gè)是用AVPlayerItem初始化的，這個(gè)是什么東西。再繼續(xù)看api，什么東西啊，亂七八糟一大推，于是乎，不看了，看看前輩們是咋玩的，后來發(fā)現(xiàn)，前輩們用了一個(gè)叫做：replaceCurrentItemWithPlayerItem:的方法給AVPlayer添加播放地址，從字面上的意思我的理解是：用PlayerItem替換當(dāng)前的item？？
完整代碼是這樣寫的：

AVPlayerItem *item = [AVPlayerItem playerItemWithURL:[NSURL URLWithString:@"視頻地址"]];
[self.player replaceCurrentItemWithPlayerItem:item];

然后AVPlayer怎么添加到AVPlayerLayer上呢？代碼如下：

_playerLayer = [AVPlayerLayer playerLayerWithPlayer:self.player];

這里要說明一下，AVPlayerLayer是需要設(shè)置frame的。

好，這里假設(shè)各個(gè)控件的初始化啊布局什么的都完事了，接下來要考慮的是控件之間相互關(guān)聯(lián)顯示的問題了。

1、我要先讓視頻播放出來再說，別的先不管，拿到地址之后，先讓self.player調(diào)一下播放方法，然后監(jiān)聽網(wǎng)絡(luò)，再然后用視頻地址初始化一個(gè)AVPlayerItem，最后用這個(gè)AVPlayerItem播放視頻，好像沒毛病，就這么干了。
2、視頻成功播放出來之后，我得要顯示視頻總時(shí)長和當(dāng)前播放時(shí)間進(jìn)度，方法如下：

NSTimeInterval totalTime = CMTimeGetSeconds(self.player.currentItem.duration);//總時(shí)長
NSTimeInterval currentTime = CMTimeGetSeconds(self.player.currentTime);//當(dāng)前時(shí)間進(jìn)度

3、經(jīng)過了七七四十九天的調(diào)整，時(shí)間終于顯示正確了，接下來需要顯示緩沖進(jìn)度了，這里就需要用的KVO來對(duì)初始化self.player的時(shí)候用到的那個(gè)AVPlayerItem的屬性進(jìn)行監(jiān)聽了，我就說這個(gè)東西肯定是有用的嘛，不然為啥那么多人都用這玩意兒。
4、又經(jīng)過了一個(gè)七七四十九天的調(diào)整，通過網(wǎng)絡(luò)監(jiān)聽工具看著的網(wǎng)絡(luò)變化，緩沖條好像也顯示正確了，最后到了進(jìn)度條的顯示了……

春夏秋冬，年復(fù)一年，日復(fù)一日，不知道經(jīng)過了多少個(gè)歲月……

5、上代碼吧，先聲明一下，代碼里面肯定是包含了一些經(jīng)過自己的加工讓它改頭換面的內(nèi)容，大家都來自五湖四海，組到一起也是緣分，代碼如下：
.h文件

#import <UIKit/UIKit.h>

NS_ASSUME_NONNULL_BEGIN

@interface VideoPlayerContainerView : UIView

@property (nonatomic, strong) NSString *urlVideo;

-(void)dealloc;

@end

NS_ASSUME_NONNULL_END

.m文件

#import "VideoPlayerContainerView.h"
#import <AVKit/AVKit.h>

#import "NetworkSpeedMonitor.h"
#import "VideoPlayerToolsView.h"

@interface VideoPlayerContainerView ()<VideoPlayerToolsViewDelegate>

@property (nonatomic, strong) AVPlayer *player;
@property (nonatomic, strong) AVPlayerLayer *playerLayer;
@property (nonatomic, strong) NetworkSpeedMonitor *speedMonitor;//網(wǎng)速監(jiān)聽
@property (nonatomic, strong) UILabel *speedTextLabel;//顯示網(wǎng)速Label
@property (nonatomic, strong) VideoPlayerToolsView *vpToolsView;//工具條

@property (nonatomic, strong) id playbackObserver;
@property (nonatomic) BOOL buffered;//是否緩沖完畢

@end

@implementation VideoPlayerContainerView

//設(shè)置播放地址
-(void)setUrlVideo:(NSString *)urlVideo{
    
    [self.player seekToTime:CMTimeMakeWithSeconds(0, NSEC_PER_SEC) toleranceBefore:kCMTimeZero toleranceAfter:kCMTimeZero];
    [self.player play];//開始播放視頻
    
    [self.speedMonitor startNetworkSpeedMonitor];//開始監(jiān)聽網(wǎng)速
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(networkSpeedChanged:) name:NetworkDownloadSpeedNotificationKey object:nil];
    
    AVPlayerItem *item = [AVPlayerItem playerItemWithURL:[NSURL URLWithString:urlVideo]];
    [self vpc_addObserverToPlayerItem:item];
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
        [self.player replaceCurrentItemWithPlayerItem:item];
        [self vpc_playerItemAddNotification];
    });
    
}

-(instancetype)initWithFrame:(CGRect)frame{
    
    self = [super initWithFrame:frame];
    if (self) {
        
        self.backgroundColor = [UIColor groupTableViewBackgroundColor];
        [self.layer addSublayer:self.playerLayer];
        [self addSubview:self.speedTextLabel];
        [self addSubview:self.vpToolsView];
        
    }
    return self;
    
}

- (void)networkSpeedChanged:(NSNotification *)sender {
    NSString *downloadSpped = [sender.userInfo objectForKey:NetworkSpeedNotificationKey];
    self.speedTextLabel.text = downloadSpped;
}

#pragma mark - 工具條
-(VideoPlayerToolsView *)vpToolsView{
    
    if (!_vpToolsView) {
        
        _vpToolsView = [[VideoPlayerToolsView alloc]initWithFrame:CGRectMake(0, CGRectGetHeight(self.frame) - 40, CGRectGetWidth(self.frame), 40)];
        _vpToolsView.delegate = self;
        
        [_vpToolsView.progressSr addTarget:self action:@selector(vpc_sliderTouchBegin:) forControlEvents:UIControlEventTouchDown];
        [_vpToolsView.progressSr addTarget:self action:@selector(vpc_sliderValueChanged:) forControlEvents:UIControlEventValueChanged];
        [_vpToolsView.progressSr addTarget:self action:@selector(vpc_sliderTouchEnd:) forControlEvents:UIControlEventTouchUpInside];
    }
    return _vpToolsView;
    
}

-(void)playButtonWithStates:(BOOL)state{
    
    if (state) {
        [self.player pause];
    }else{
        [self.player play];
    }
    
}

- (void)vpc_sliderTouchBegin:(UISlider *)sender {
    [self.player pause];
}

- (void)vpc_sliderValueChanged:(UISlider *)sender {
    
    NSTimeInterval currentTime = CMTimeGetSeconds(self.player.currentItem.duration) * _vpToolsView.progressSr.value;
    NSInteger currentMin = currentTime / 60;
    NSInteger currentSec = (NSInteger)currentTime % 60;
    _vpToolsView.lTime.text = [NSString stringWithFormat:@"%02ld:%02ld",currentMin,currentSec];
    
}

- (void)vpc_sliderTouchEnd:(UISlider *)sender {
    
    NSTimeInterval slideTime = CMTimeGetSeconds(self.player.currentItem.duration) * _vpToolsView.progressSr.value;
    if (slideTime == CMTimeGetSeconds(self.player.currentItem.duration)) {
        slideTime -= 0.5;
    }
    [self.player seekToTime:CMTimeMakeWithSeconds(slideTime, NSEC_PER_SEC) toleranceBefore:kCMTimeZero toleranceAfter:kCMTimeZero];
    [self.player play];
    
}

#pragma mark - 網(wǎng)速監(jiān)聽器
- (NetworkSpeedMonitor *)speedMonitor {
    if (!_speedMonitor) {
        _speedMonitor = [[NetworkSpeedMonitor alloc] init];
    }
    return _speedMonitor;
}

#pragma mark - 顯示網(wǎng)速Label
- (UILabel *)speedTextLabel {
    
    if (!_speedTextLabel) {
        _speedTextLabel = [UILabel new];
        _speedTextLabel.frame = CGRectMake(0, 0, self.frame.size.width, 20);
        _speedTextLabel.textColor = [UIColor whiteColor];
        _speedTextLabel.font = [UIFont systemFontOfSize:12.0];
        _speedTextLabel.textAlignment = NSTextAlignmentCenter;
        _speedTextLabel.backgroundColor = [UIColor colorWithWhite:0 alpha:0.5];
    }
    return _speedTextLabel;
    
}

#pragma mark - AVPlayer
-(AVPlayer *)player{
    
    if (!_player) {
        _player = [[AVPlayer alloc] init];
        __weak typeof(self) weakSelf = self;
        // 每秒回調(diào)一次
        self.playbackObserver = [_player addPeriodicTimeObserverForInterval:CMTimeMake(1, 1) queue:NULL usingBlock:^(CMTime time) {
            [weakSelf vpc_setTimeLabel];
            NSTimeInterval totalTime = CMTimeGetSeconds(weakSelf.player.currentItem.duration);//總時(shí)長
            NSTimeInterval currentTime = time.value / time.timescale;//當(dāng)前時(shí)間進(jìn)度
            weakSelf.vpToolsView.progressSr.value = currentTime / totalTime;
        }];
    }
    return _player;
    
}

#pragma mark - AVPlayerLayer
-(AVPlayerLayer *)playerLayer{
    
    if (!_playerLayer) {
        _playerLayer = [AVPlayerLayer playerLayerWithPlayer:self.player];
        _playerLayer.frame = CGRectMake(0, 0, self.frame.size.width, self.frame.size.height);
    }
    return _playerLayer;
    
}

#pragma mark ---------華麗的分割線---------

#pragma mark - lTime
- (void)vpc_setTimeLabel {
    
    NSTimeInterval totalTime = CMTimeGetSeconds(self.player.currentItem.duration);//總時(shí)長
    NSTimeInterval currentTime = CMTimeGetSeconds(self.player.currentTime);//當(dāng)前時(shí)間進(jìn)度
    
    // 切換視頻源時(shí)totalTime/currentTime的值會(huì)出現(xiàn)nan導(dǎo)致時(shí)間錯(cuò)亂
    if (!(totalTime >= 0) || !(currentTime >= 0)) {
        totalTime = 0;
        currentTime = 0;
    }
    
    NSInteger totalMin = totalTime / 60;
    NSInteger totalSec = (NSInteger)totalTime % 60;
    NSString *totalTimeStr = [NSString stringWithFormat:@"%02ld:%02ld",totalMin,totalSec];
    
    NSInteger currentMin = currentTime / 60;
    NSInteger currentSec = (NSInteger)currentTime % 60;
    NSString *currentTimeStr = [NSString stringWithFormat:@"%02ld:%02ld",currentMin,currentSec];
    
    _vpToolsView.lTime.text = [NSString stringWithFormat:@"%@/%@",currentTimeStr,totalTimeStr];
    
}

#pragma mark - 觀察者
- (void)vpc_playerItemAddNotification {
    // 播放完成通知
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(vpc_playbackFinished:) name:AVPlayerItemDidPlayToEndTimeNotification object:self.player.currentItem];
}

-(void)vpc_playbackFinished:(NSNotification *)noti{
    [self.player pause];
}

- (void)vpc_addObserverToPlayerItem:(AVPlayerItem *)playerItem {
    // 監(jiān)聽播放狀態(tài)
    [playerItem addObserver:self forKeyPath:@"status" options:NSKeyValueObservingOptionNew context:nil];
    // 監(jiān)聽緩沖進(jìn)度
    [playerItem addObserver:self forKeyPath:@"loadedTimeRanges" options:NSKeyValueObservingOptionNew context:nil];
}

- (void)vpc_playerItemRemoveNotification {
    [[NSNotificationCenter defaultCenter] removeObserver:self name:AVPlayerItemDidPlayToEndTimeNotification object:self.player.currentItem];
}

- (void)vpc_playerItemRemoveObserver {
    [self.player.currentItem removeObserver:self forKeyPath:@"status"];
    [self.player.currentItem removeObserver:self forKeyPath:@"loadedTimeRanges"];
}

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSString *,id> *)change context:(void *)context {
    if ([keyPath isEqualToString:@"status"]) {
        AVPlayerStatus status= [[change objectForKey:@"new"] intValue];
        if (status == AVPlayerStatusReadyToPlay) {
            [self vpc_setTimeLabel];
        }
    } else if ([keyPath isEqualToString:@"loadedTimeRanges"]) {
        NSArray *array = self.player.currentItem.loadedTimeRanges;
        CMTimeRange timeRange = [array.firstObject CMTimeRangeValue];//本次緩沖時(shí)間范圍
        NSTimeInterval startSeconds = CMTimeGetSeconds(timeRange.start);//本次緩沖起始時(shí)間
        NSTimeInterval durationSeconds = CMTimeGetSeconds(timeRange.duration);//緩沖時(shí)間
        NSTimeInterval totalBuffer = startSeconds + durationSeconds;//緩沖總長度
        float totalTime = CMTimeGetSeconds(self.player.currentItem.duration);//視頻總長度
        float progress = totalBuffer/totalTime;//緩沖進(jìn)度
        NSLog(@"progress = %lf",progress);
        
        //如果緩沖完了，拖動(dòng)進(jìn)度條不需要重新顯示緩沖條
        if (!self.buffered) {
            if (progress == 1.0) {
                self.buffered = YES;
            }
            [self.vpToolsView.bufferPV setProgress:progress];
        }
        NSLog(@"yon = %@",self.buffered ? @"yes" : @"no");
    }
}

- (void)dealloc {
    
    [self.speedMonitor stopNetworkSpeedMonitor];
    [[NSNotificationCenter defaultCenter] removeObserver:self name:NetworkDownloadSpeedNotificationKey object:nil];
    
    [self.player removeTimeObserver:self.playbackObserver];
    [self vpc_playerItemRemoveObserver];
    [self.player replaceCurrentItemWithPlayerItem:nil];
    [[NSNotificationCenter defaultCenter] removeObserver:self];
    
}

@end

4、整合

最后全部封裝完了之后，調(diào)用的時(shí)候，只需要引入頭文件#import "VideoPlayerContainerView.h"，在需要用的地方，直接聲明，傳值就ok了

VideoPlayerContainerView *vpcView = [[VideoPlayerContainerView alloc]initWithFrame:CGRectMake(0, 100, [UIScreen mainScreen].bounds.size.width, 200)];
[self.view addSubview:vpcView];
    
vpcView.urlVideo = @"https://www.apple.com/105/media/cn/researchkit/2016/a63aa7d4_e6fd_483f_a59d_d962016c8093/films/carekit/researchkit-carekit-cn-20160321_848x480.mp4";

效果圖.gif

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iOS 基于AVPlayer的簡易播放器

iOS 基于AVPlayer的簡易播放器

1、工具條

2、網(wǎng)絡(luò)狀態(tài)監(jiān)聽器

3、AVPlayer播放器

4、整合

5、全劇終

相關(guān)閱讀更多精彩內(nèi)容

友情鏈接更多精彩內(nèi)容

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iOS 基于AVPlayer的簡易播放器

1、工具條

2、網(wǎng)絡(luò)狀態(tài)監(jiān)聽器

3、AVPlayer播放器

4、整合

5、全劇終

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1、工具條

2、網(wǎng)絡(luò)狀態(tài)監(jiān)聽器

3、AVPlayer播放器

4、整合

5、全劇終