AVAudioPlayer播放并实现了后台播放和远程控制
// ViewController.h #import <UIKit/UIKit.h> #import <AVFoundation/AVFoundation.h> @class AVAudioPlayer; @interface PlayViewController : UIViewController<AVAudioPlayerDelegate> @property(nonatomic, strong) AVAudioPlayer *player; + (PlayViewController *)defaultPlayVC; //将该播放页面定义成单例 @end
// ViewController.m #import "PlayViewController.h" @interface PlayViewController () @property (retain, nonatomic) IBOutlet UIButton *suspendBtn; //暂停按钮 @property (retain, nonatomic) IBOutlet UIButton *formerBtn; //上一首按钮 @property (retain, nonatomic) IBOutlet UIButton *nextBtn; //下一首按钮 @property (retain, nonatomic) IBOutlet UISlider *slider; //滑块 @property (retain, nonatomic) NSArray *musicUrlArray; //音乐网址数组 @property (retain, nonatomic) NSArray *musicAllTimeArray; //音乐时间数组 @property (retain, nonatomic) NSTimer *timer; //计时器 @property (assign, nonatomic) int currentIndex; //当前音频下标 @end @implementation PlayViewController
#pragma mark 单例初始化方法
+ (PlayViewController *)defaultPlayVC {
static PlayViewController *playVC = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
playVC = [[PlayViewController alloc] init];
});
return playVC;
}
- (void)viewDidLoad {
[super viewDidLoad];
self.currentIndex = 0;
self.musicUrlArray = [NSArray arrayWithObjects:@"http://fdfs.xmcdn.com/group10/M08/D4/2E/wKgDaVZ9EYaQ-j48AFIOaAXL-wM019.mp3",
@"http://fdfs.xmcdn.com/group13/M09/D4/17/wKgDXVZ6fR2wR1E8AFuO_VClRZA066.mp3",
@"http://fdfs.xmcdn.com/group16/M0A/D5/16/wKgDbFZ89SqyFGWGAHoEKd7yPsw709.mp3",
@"http://fdfs.xmcdn.com/group8/M01/D4/34/wKgDYFZ6y1nR6QpZAEDVy7rUTTc247.mp3",
@"http://fdfs.xmcdn.com/group9/M00/D4/EF/wKgDZlZ7aLGCQEEDAHMsQsurq_Y170.mp3",
@"http://fdfs.xmcdn.com/group12/M07/D4/C4/wKgDW1Z70rWxoDA7ABAp1lwS5nI990.mp3", nil];
self.musicAllTimeArray = [NSArray arrayWithObjects:@(1344.36), @(1500.04), @(1999.06), @(1062.22), @(1886.96), @(264.76), nil];
//滑块
self.slider.minimumValue = 0;
[self.slider addTarget:self action:@selector(changValue:) forControlEvents:UIControlEventValueChanged]; //添加滑动事件
[self.slider setThumbImage:[UIImage imageNamed:@"playProcessDot_n"]forState:UIControlStateNormal];
//播放音频之前先要设置AVAudioSession模式 是它可以后台播放
//并且要在plist文件中 添加required background modes这个key项，并选择"App plays audio or streams audio/video using AirPlay"这个value项。
AVAudioSession *session = [AVAudioSession sharedInstance];
[session setCategory:AVAudioSessionCategoryPlayback error:nil];
[session setActive:YES error:nil];
[self playerCurrentMusic];
}
-(void)playerCurrentMusic {
//创建串行队列 (放入线程中,免得页面假死)
dispatch_queue_t serialQueue = dispatch_queue_create("com.audio.www", DISPATCH_QUEUE_SERIAL);
dispatch_async(serialQueue, ^{
NSString *url = self.musicUrlArray[self.currentIndex];
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:url]];
self.player = [[AVAudioPlayer alloc] initWithData:data error:nil];
self.player.delegate = self;
[self.player prepareToPlay];
[self.player play];
//滑块
CGFloat allTime = [self.musicAllTimeArray[self.currentIndex] floatValue];
self.slider.maximumValue = allTime;
//计时器只能在主线程中
dispatch_async(dispatch_get_main_queue(), ^{
self.timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(reloadAction) userInfo:nil repeats:YES];
});
});
}
#pragma mark -- 每1秒 给进度条赋一次值
-(void)reloadAction {
if ([self.player isPlaying]) {
self.slider.value = self.player.currentTime;
}
}
#pragma mark 点击暂停
- (IBAction)suspendAction:(UIButton *)sender {
sender.selected = !sender.selected;
if (sender.selected) {
[self.player pause]; //暂停
[sender setTitle:@"播放" forState:UIControlStateSelected];
} else {
[self.player play]; //播放
[sender setTitle:@"暂停" forState:UIControlStateNormal];
}
}
#pragma mark 点击上一首
- (IBAction)formerAction:(UIButton *)sender {
[self myPlayFormer]; //播放上一首
}
#pragma mark 点击下一首
- (IBAction)nextAction:(UIButton *)sender {
[self myPlayNext]; //播放下一首
}
#pragma mark 上一首
-(void)myPlayFormer {
if (self.currentIndex > 0) {
[self.player pause];
self.currentIndex--;
[self playerCurrentMusic];
}
}
#pragma mark 下一首
-(void)myPlayNext {
if (self.currentIndex < self.musicUrlArray.count - 1) {
[self.player pause];
self.currentIndex++;
[self playerCurrentMusic];
}
}
/***************** 控制台 *****************/
#pragma mark -- 声明App接收远程控制事件
-(void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[self becomeFirstResponder];
}
#pragma mark -- App结束声明接收远程控制事件
- (void) viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
[[UIApplication sharedApplication] endReceivingRemoteControlEvents];
[self resignFirstResponder];
}
#pragma mark -- 接受控制台的控制事件
- (void)remoteControlReceivedWithEvent: (UIEvent *) receivedEvent {
if (receivedEvent.type == UIEventTypeRemoteControl) {
//判断点击按钮的类型
switch (receivedEvent.subtype) {
case UIEventSubtypeRemoteControlPlay:
[self.player play]; //播放
break;
case UIEventSubtypeRemoteControlPause:
[self.player pause]; //暂停
break;
case UIEventSubtypeRemoteControlPreviousTrack:
[self myPlayFormer]; //播放上一首
break;
case UIEventSubtypeRemoteControlNextTrack:
[self myPlayNext]; //播放下一首
break;
default:
break;
}
}
}
#pragma mark 实现后台播放完一首后, 继续播放下一首
- (BOOL)canBecomeFirstResponder {
return YES;
}
/***************** AVAudioPlayer 代理 *****************/
#pragma mark -- 后台播放被打断, 继续恢复播放 (比如打电话...)
- (void)audioPlayerEndInterruption:(AVAudioPlayer *)player withOptions:(NSUInteger)flags {
[self.player play];
}
#pragma mark -- 播放完当前声音后,播放下一首
-(void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag {
if (self.currentIndex < self.musicUrlArray.count - 1) {
self.currentIndex++;
[self playerCurrentMusic];
}
}
#pragma mark -- 滑块滑动改变播放进度(代理方法)
-(void)changValue:(UISlider *)slider {
//拖动滑块时, 停止计时器
[self.timer invalidate];
self.player.currentTime = slider.value;
//开始计时器
self.timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(reloadAction) userInfo:nil repeats:YES];
}
想要实现后台播放（即程序进入后台，音乐继续播放）需要修改plist文件:
1.添加required background modes这个key项，并选择"App plays audio or streams audio/video using AirPlay"这个value项。
2.XCode7.1以上获取网络数据,需要修改plist文件
在
Info.plist
中添加
App Transport Security Settings
类型
Dictionary
。
在
App Transport Security Settings
下添加
Allow Arbitrary Loads类型
Boolean,
值设为
YES
需要在后台实现播放页的各种上一首,下一首...各种功能, 还需要在Appdelegate.m的background方法里:
- (void)applicationDidEnterBackground:(UIApplication *)application {
//程序进入后台后, 为了让音乐继续播放, 在此方法里创建该代理播放页, 并指定它播放器的代理
PlayViewController *player = [PlayViewController defaultPlayVC];
player.player.delegate = player;
}