0AC7D6DB-AC44-45E6-A457-2D1517F1DF3F.png
歌手图片旋转：
先设置一个全局变量动画:
{
CABasicAnimation* _rotationAnimation; /**< 歌手图片旋转动画 */
}
初始化动画操作,歌手图片旋转动画
// 歌手图片动画效果
_rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];
_rotationAnimation.toValue = [NSNumber numberWithFloat: M_PI * 2];
_rotationAnimation.duration = kTimerInterval;
_rotationAnimation.cumulative = YES;
_rotationAnimation.repeatCount = CGFLOAT_MAX; // 设置旋转次数
当歌曲开始播放的时候，将动画操作添加到歌手图片ImageView
[self.playerImageView.layer addAnimation:_rotationAnimation forKey:@"rotationAnimation"];
这样，类似网易云音乐歌手图片旋转的效果出来了
接下来就是播放器的实现了，在这里使用的是AVPlayer来实现网络音乐播放
AVPlayer中含有一个属性：AVPlayerItem，这个是媒体资源，包含媒体的总时间、缓冲情况等
1.初始化一个AVPlayer
NSURL *url = [NSURLURLWithString:@"http://mr7.doubanio.com/3fd082ae3370d22e48e300ab1d5d6590/1/fm/song/p190415_128k.mp4"];
self.songItem = [AVPlayerItemplayerItemWithURL:url];
self.player = [AVPlayerplayerWithPlayerItem:self.songItem];
2.播放音乐
[self.playerplay];
3.暂停音乐
[self.playerpause];
4.一个简单的在线播放网络音乐就完成了，接下来需要显示歌曲的时间，首先添加一个监听媒体资源的加载情况
// 监听媒体资源缓冲情况
[self.songItem addObserver:selfforKeyPath:@"loadedTimeRanges"options:NSKeyValueObservingOptionNewcontext:nil];
5.在媒体加载时响应监听方法时获取到歌曲的总时间，在这里，只需要获取一次，由于只有一首歌，所以使用GCD的方式去获取歌曲总时间
/**
* KVO监听方法
*
* @param keyPath
* @param object
* @param change
* @param context
*/
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSString *,id> *)change context:(void *)context {
AVPlayerItem *songItem = object;
if ([keyPath isEqualToString:@"loadedTimeRanges"]) {
// 媒体总时长
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
self.songTime = CMTimeGetSeconds(songItem.duration); // 获取到媒体的总时长
});
// 媒体缓冲
NSArray *array=songItem.loadedTimeRanges;
CMTimeRange timeRange = [array.firstObject CMTimeRangeValue];//本次缓冲时间的范围
float startSeconds = CMTimeGetSeconds(timeRange.start);
float durationSeconds = CMTimeGetSeconds(timeRange.duration);
NSTimeInterval totalBuffer = startSeconds + durationSeconds;//缓冲的总长度
NSLog(@"共缓冲：%.3f, %lf",totalBuffer, CMTimeGetSeconds(songItem.duration));
}
}
获取到了歌曲的时间，我们还需要显示当前歌曲播放的时间，根据获取到的时间去实现进度条的改变
__weak typeof(self) weakSelf = self;
// 监听播放进度
self.timeObserve = [self.player addPeriodicTimeObserverForInterval:CMTimeMake(1.0, 1.0) queue:dispatch_get_main_queue() usingBlock:^(CMTime time) {
CGFloat current = CMTimeGetSeconds(time);
weakSelf.currentTime = current;
}];
到了这里，可以根据获得到的时间来计算进度条的value，接下来是根据通过改变进度条的value来实现播放器播放进度，给进度条添加一个target事件
// 监听进度条的手动改变
[self.progress addTarget:self action:@selector(progressValueChage) forControlEvents:UIControlEventValueChanged];
当拖动进度条的监听方法去实现控制播放器的播放进度
/**
* 进度条改变操作
*/
- (void)progressValueChage {
CGFloat currentTime = self.songTimes * self.progress.value;
[self.player changeProgress:currentTime];
}
/**
* 手动改变进度
*
* @param second 当前播放时间
*/
- (void)changeProgress:(CGFloat)second {
[self.player pause];
[self.player seekToTime:CMTimeMakeWithSeconds(second, NSEC_PER_SEC) completionHandler:^(BOOL finished) {
[self.player play];
}];
}
这样一个简单的播放器网络音乐就完成了
最后附上完整的代码
ViewController.m文件
#import "ViewController.h"
#import "GPPlayer.h"
#import "UIView+Category.h"
#define kImageViewWidth 230
#define kTimerInterval 20
@interface ViewController ()
@property (nonatomic, strong) GPPlayer *player; /**< 播放器 */
@property (weak, nonatomic) IBOutlet UILabel *songTimeLabel;
@property (weak, nonatomic) IBOutlet UILabel *currentTime;
@property (nonatomic, weak) UIImageView *playerImageView; /**< 歌手图片 */
@property (weak, nonatomic) IBOutlet UISlider *progress; /**< 进度条 */
@property (nonatomic, assign) CGFloat songTimes; /**< 歌曲总时间 */
@end
@implementation ViewController
{
CABasicAnimation* _rotationAnimation; /**< 歌手图片旋转动画 */
}
- (void)viewDidLoad {
[super viewDidLoad];
// 歌手图片
UIImageView *playerImageView = [[UIImageView alloc] init];
playerImageView.y = 50;
playerImageView.size = CGSizeMake(kImageViewWidth, kImageViewWidth);
playerImageView.centerX = self.view.centerX;
playerImageView.image = [UIImage imageNamed:@"xufei.jpg"];
playerImageView.layer.cornerRadius = kImageViewWidth * 0.5;
playerImageView.layer.masksToBounds = YES;
[self.view addSubview:playerImageView];
self.playerImageView = playerImageView;
// 歌手图片动画效果
_rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];
_rotationAnimation.toValue = [NSNumber numberWithFloat: M_PI * 2];
_rotationAnimation.duration = kTimerInterval;
_rotationAnimation.cumulative = YES;
_rotationAnimation.repeatCount = CGFLOAT_MAX; // 设置旋转次数
// 监听进度条的手动改变
[self.progress addTarget:self action:@selector(progressValueChage) forControlEvents:UIControlEventValueChanged];
}
/**
* 播放
*
* @param sender
*/
- (IBAction)play:(UIButton *)sender {
sender.showsTouchWhenHighlighted = YES;
[self.player play];
// 旋转歌手图片
[self imageViewRotate];
}
/**
* 播放
*
* @param sender
*/
- (IBAction)pause:(UIButton *)sender {
[self.player pause];
[self.playerImageView.layer removeAnimationForKey:@"rotationAnimation"];
}
#pragma mark - 自定义方法
/**
* 歌手图片旋转动画
*/
- (void)imageViewRotate {
[self.playerImageView.layer addAnimation:_rotationAnimation forKey:@"rotationAnimation"];
}
/**
* 时间转换
*
* @param time 秒数
*
* @return
*/
- (NSString *)convertStringWithTime:(float)time {
if (isnan(time)) time = 0.f;
int min = time / 60.0;
int sec = time - min * 60;
NSString * minStr = min > 9 ? [NSString stringWithFormat:@"%d",min] : [NSString stringWithFormat:@"0%d",min];
NSString * secStr = sec > 9 ? [NSString stringWithFormat:@"%d",sec] : [NSString stringWithFormat:@"0%d",sec];
NSString * timeStr = [NSString stringWithFormat:@"%@:%@",minStr, secStr];
return timeStr;
}
#pragma mark - KVO
/**
* 观察者监听方法
*
* @param keyPath
* @param object
* @param change
* @param context
*/
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSString *,id> *)change context:(void *)context {
if ([keyPath isEqualToString:@"songTime"]) {
self.songTimes = self.player.songTime;
self.songTimeLabel.text = [self convertStringWithTime:self.player.songTime];
} else if ([keyPath isEqualToString:@"currentTime"]) {
self.currentTime.text = [self convertStringWithTime:self.player.currentTime];
CGFloat pro = self.player.currentTime / self.songTimes; /**< 播放进度 */
self.progress.value = pro;
}
}
/**
* 进度条改变操作
*/
- (void)progressValueChage {
CGFloat currentTime = self.songTimes * self.progress.value;
[self.player changeProgress:currentTime];
}
#pragma mark - 懒加载
/**
* 播放器
*
* @return
*/
- (GPPlayer *)player {
if (_player == nil) {
_player = [[GPPlayer alloc] init];
[_player addObserver:self forKeyPath:@"songTime" options:NSKeyValueObservingOptionNew context:nil];
[_player addObserver:self forKeyPath:@"currentTime" options:NSKeyValueObservingOptionNew context:nil];
}
return _player;
}
@end
GPPlayer.h
@interface GPPlayer : NSObject
@property (nonatomic, assign) CGFloat songTime; /**< 歌曲总时间 */
@property (nonatomic, assign) CGFloat currentTime; /**< 当前播放时间 */
/**
* 播放音乐
*/
- (void)play;
/**
* 暂停播放
*/
- (void)pause;
/**
* 手动改变播放进度
*/
- (void)changeProgress:(CGFloat)second;
@end
GPPlayer.m
#import "GPPlayer.h"
#import <AVFoundation/AVFoundation.h>
@interface GPPlayer ()
@property (nonatomic, strong) AVPlayer *player; /**< 播放器 */
@property (nonatomic, strong) AVPlayerItem *songItem;
@property (nonatomic, strong) id timeObserve;
@end
@implementation GPPlayer
- (instancetype)init {
if (self = [super init]) {
[self setup];
}
return self;
}
/**
* 初始化播放器
*/
- (void)setup {
NSURL *url = [NSURL URLWithString:@"http://mr7.doubanio.com/3fd082ae3370d22e48e300ab1d5d6590/1/fm/song/p190415_128k.mp4"];
self.songItem = [AVPlayerItem playerItemWithURL:url];
self.player = [AVPlayer playerWithPlayerItem:self.songItem];
[self addObserver];
}
/**
* 添加观察者
*/
- (void)addObserver {
// 监听媒体资源的状态
[self.songItem addObserver:self forKeyPath:@"status" options:NSKeyValueObservingOptionNew context:nil];
// 监听媒体资源缓冲情况
[self.songItem addObserver:self forKeyPath:@"loadedTimeRanges" options:NSKeyValueObservingOptionNew context:nil];
__weak typeof(self) weakSelf = self;
// 监听播放进度
self.timeObserve = [self.player addPeriodicTimeObserverForInterval:CMTimeMake(1.0, 1.0) queue:dispatch_get_main_queue() usingBlock:^(CMTime time) {
CGFloat current = CMTimeGetSeconds(time);
weakSelf.currentTime = current;
}];
// 监听播放是否完成
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playerFinish:) name:AVPlayerItemDidPlayToEndTimeNotification object:nil];
}
/**
* KVO监听方法
*
* @param keyPath
* @param object
* @param change
* @param context
*/
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSString *,id> *)change context:(void *)context {
AVPlayerItem *songItem = object;
if ([keyPath isEqualToString:@"status"]) {
// 媒体加载
switch (self.player.status) {
case AVPlayerStatusFailed:
NSLog(@"KVO:加载失败,网络或者服务器出现问题");
break;
case AVPlayerStatusReadyToPlay:
NSLog(@"KVO:准备完毕，可以播放");
break;
case AVPlayerStatusUnknown:
NSLog(@"KVO:未知状态");
break;
}
} else if ([keyPath isEqualToString:@"loadedTimeRanges"]) {
// 媒体总时长
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
self.songTime = CMTimeGetSeconds(songItem.duration); // 获取到媒体的总时长
});
// 媒体缓冲
NSArray *array=songItem.loadedTimeRanges;
CMTimeRange timeRange = [array.firstObject CMTimeRangeValue];//本次缓冲时间范围
float startSeconds = CMTimeGetSeconds(timeRange.start);
float durationSeconds = CMTimeGetSeconds(timeRange.duration);
NSTimeInterval totalBuffer = startSeconds + durationSeconds;//缓冲总长度
NSLog(@"共缓冲：%.2f, %lf",totalBuffer, CMTimeGetSeconds(songItem.duration));
}
}
/**
* 监听播放器播放完成
*
* @param sender
*/
- (void)playerFinish:(NSNotification *)sender {
NSLog(@"播放完成");
}
/**
* 手动改变进度
*
* @param second 当前播放时间
*/
- (void)changeProgress:(CGFloat)second {
[self.player pause];
[self.player seekToTime:CMTimeMakeWithSeconds(second, NSEC_PER_SEC) completionHandler:^(BOOL finished) {
[self.player play];
}];
}
#pragma mark - 播放器操作
/**
* 播放音乐
*/
- (void)play {
[self.player play];
}
/**
* 暂停播放
*/
- (void)pause {
[self.player pause];
}
@end
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