1.搭建音樂播放器的界面
對于這個音樂播放器我只實(shí)現(xiàn)了播放 ?暫停 ?下一曲 上一曲 停止 ?音量加減 和從歌曲列表中選歌并播放的功能 ?更多功能 歡迎大家參考我的代碼 ?進(jìn)行修改陵霉，代碼中有些不妥地方，還望各位大神指出乃摹。
整體界面搭建出來 ?是這個樣子:
這個是播放列表的樣子 ?我把它做成半透明的樣式;
在搭建界面的時候 ?我們可以使用XIB來畫 ? 這樣可以節(jié)約很多開發(fā)的時間 ?這個例子中 大多界面的地方我還是使用的純代碼實(shí)現(xiàn) ?因?yàn)榧兇a編寫雖然有點(diǎn)耽誤時間 ? 但是將來進(jìn)行版本控制的時候 ?非常方便.在使用XIB的時候 ?要注意的問題：
當(dāng)你畫了一個控件 ?點(diǎn)擊右上角的輔助編輯器 ?你可以使用按住Ctrl ?加鼠標(biāo)左鍵 ? 拖到你的編輯器 ?然后為你的控件取名字. ? 當(dāng)你想刪除的時候 ?一定要點(diǎn)擊storyBord ?在你要刪除的空間的上面 右鍵 ?然后點(diǎn)擊叉叉 ? 就可以刪除與代碼區(qū)的綁定 ?免糕。如果要再次綁定只需要再次Ctrl加鼠標(biāo)左鍵 ? 拖過來.
代碼區(qū)：
#import "ViewController.h"#import#define WIDTH self.view.bounds.size.width#define HEIGHT self.view.bounds.size.height@interface ViewController (){
AVAudioPlayer *MyPlayer;//不能做成局部變量
NSTimer *timer;
NSMutableArray *songs;
NSUInteger myindex;
UIStepper *volumeStepper;
int index1;
UIView *view;
UITableView *myTableView;
NSMutableArray *dataArray;
}
@property (weak, nonatomic) IBOutlet UILabel *albumLabel;
@property (weak, nonatomic) IBOutlet UILabel *artistLabel;
@property (weak, nonatomic) IBOutlet UILabel *titleLabel;
@property (weak, nonatomic) IBOutlet UIImageView *coverImageView;
@property (weak, nonatomic) IBOutlet UIProgressView *playProgressView;
@end
@implementation ViewController
-(void)dealloc{
if (timer) {
[timer invalidate];
timer = nil;
}
}
- (void)viewDidLoad {
[super viewDidLoad];
myindex = 1;
_playProgressView.progress = 0;
songs = [NSMutableArray arrayWithObjects:@"月半小夜曲",@"后會無期",@"靜靜看著你",@"李白",@"喜歡你",@"Taylor Swift - Love Story (International Radio Mi", nil];
_coverImageView.layer.cornerRadius = 100;
_coverImageView.clipsToBounds = YES;
NSString *filename = [[NSBundle mainBundle] pathForResource:@"李白" ofType:@"mp3"];
//拿到mp3
// NSString *filename = [[NSBundle mainBundle] pathForResource:@"后會無期" ofType:@"mp3"];
NSURL *fileUrl = [NSURL fileURLWithPath:filename];
//先拿到文件? 才能拿到數(shù)據(jù)? 才能刷新
[self updateUI:fileUrl];
MyPlayer = [[AVAudioPlayer alloc]initWithContentsOfURL:fileUrl error:nil];
//設(shè)置支持后臺播放后臺播放
//獲得當(dāng)前音頻會話對象的單例
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
[audioSession setActive:YES error:nil];
[audioSession setCategory:AVAudioSessionCategoryPlayback error:nil];
//打開項目? capabilities--->?? background modes--->? 打開audio and airplay? 設(shè)置支持后臺播放
//打開項目? capabilities--->?? background modes--->? 打開remote notifications 設(shè)置支持耳機(jī)
[[UIApplication sharedApplication]beginReceivingRemoteControlEvents];
//聲道
// player.pan = -1;
//音樂大小? 0~1?? 最大值可以修改? 是一種軟修改
//MyPlayer.volume = 1;
//文件播放速率? 用于快進(jìn) 快退
//player.enableRate = YES;
//player.rate = 4;
//跳過20s再播放
//MyPlayer.currentTime = 270;
MyPlayer.delegate = self;
//文件緩存
//[MyPlayer prepareToPlay];
//播放音樂
// [MyPlayer play];
//? ? progressSlider? = [[UISlider alloc]initWithFrame:CGRectMake(65, 440, 245, 15)];
//
//? ? [progressSlider addTarget:self action:@selector(progressValueChange) forControlEvents:UIControlEventValueChanged];
//? ? [self.view addSubview:progressSlider];
timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(progressChange) userInfo:nil repeats:YES];
timer.fireDate = [NSDate distantFuture];
#if 0
volumeStepper = [[UIStepper alloc]initWithFrame:CGRectMake(WIDTH/3+15, 4*HEIGHT/7, 30, 20)];
[volumeStepper addTarget:self action:@selector(volumeChange:) forControlEvents:UIControlEventValueChanged];
volumeStepper.minimumValue = 0;
volumeStepper.maximumValue = 3;
volumeStepper.stepValue = 1;
//設(shè)置控制器背景圖片
volumeStepper.tintColor = [UIColor lightGrayColor];
[self.view addSubview:volumeStepper];
#endif
view = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 300, 270)];
view.center = CGPointMake(WIDTH/2, HEIGHT/3);
view.hidden = YES;
view.alpha = 0.6;
[self.view addSubview:view];
myTableView = [[UITableView alloc]initWithFrame:CGRectMake(0, 0, view.bounds.size.width, view.bounds.size.height) style:UITableViewStylePlain];
[view addSubview:myTableView];
myTableView.dataSource = self;
myTableView.delegate = self;
[self loadDataModel];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"CELL"];
if (!cell) {
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"CELL"];
cell.backgroundColor = [UIColor colorWithRed:85.88 green:71.78 blue:60.74 alpha:0.6];
}
//cell.backgroundView = nil;
cell.contentView.backgroundColor = [UIColor colorWithRed:85.88 green:71.78 blue:60.74 alpha:0.6];
[myTableView setSeparatorStyle:UITableViewCellSeparatorStyleNone];
cell.opaque = NO;
cell.textLabel.backgroundColor = [UIColor colorWithRed:85.88 green:71.78 blue:60.74 alpha:0.6];
cell.textLabel.text = dataArray[indexPath.row];
return cell;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return dataArray.count;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
NSString *filename = [[NSBundle mainBundle] pathForResource:songs[indexPath.row] ofType:@"mp3"];
NSURL *fileUrl = [NSURL fileURLWithPath:filename];
[self updateUI:fileUrl];
MyPlayer = [[AVAudioPlayer alloc]initWithContentsOfURL:fileUrl error:nil];
MyPlayer.volume = 1;
MyPlayer.delegate = self;
[MyPlayer prepareToPlay];
[MyPlayer play];
view.hidden = YES;
}
-(void)loadDataModel{
if (!dataArray) {
dataArray = [NSMutableArray array];
}
dataArray = [NSMutableArray arrayWithObjects:@"月半小夜曲",@"后會無期",@"靜靜看著你",@"李白",@"喜歡你",@"Taylor Swift - Love Story (International Radio Mi", nil];
}
-(void)volumeChange:(UIStepper *)sender{
MyPlayer.volume = sender.value;
}
//進(jìn)度條改變的回調(diào)方法
-(void)progressChange{
_playProgressView.progress = MyPlayer.currentTime/MyPlayer.duration;
[UIView animateWithDuration:8 animations:^{
_coverImageView.transform = CGAffineTransformRotate(_coverImageView.transform, M_PI_4/5);
}];
}
- (IBAction)volumeIncreaseButtonClicked:(UIButton *)sender {
MyPlayer.volume += 1;
if (MyPlayer.volume>4) {
MyPlayer.volume = 4;
}
}
- (IBAction)volumeDecreaseButtonClicked:(UIButton *)sender {
MyPlayer.volume -= 1;
if (MyPlayer.volume<0) {
MyPlayer.volume = 0;
}
}
//播放列表
- (IBAction)MusicListButtonClicked:(UIButton *)sender {
view.hidden = !view.hidden;
}
//播放結(jié)束
-(void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag{
index1 = arc4random()%6;
if (index1!=myindex) {
myindex = index1;
}
NSString *filename = [[NSBundle mainBundle] pathForResource:songs[myindex] ofType:@"mp3"];
NSURL *fileUrl = [NSURL fileURLWithPath:filename];
[self updateUI:fileUrl];
MyPlayer = [[AVAudioPlayer alloc]initWithContentsOfURL:fileUrl error:nil];
MyPlayer.volume = 1;
MyPlayer.delegate = self;
[MyPlayer prepareToPlay];
[MyPlayer play];
}
//刷新界面 拿到歌的信息 刷新界面
-(void)updateUI:(NSURL *)fileUrl{
//代表和文件相關(guān)的數(shù)據(jù)
AVURLAsset *assset = [[AVURLAsset alloc]initWithURL:fileUrl options:nil];
//[assset availableMetadataFormats];//元數(shù)據(jù)的格式
NSArray *metaDataItems =[assset metadataForFormat:[[assset availableMetadataFormats] firstObject]];
for (AVMetadataItem *item in metaDataItems) {
if ([item.commonKey isEqualToString:@"artist"]) {
_artistLabel.text = [item.value description];
}
else if ([item.commonKey isEqualToString:@"title"]){
_titleLabel.text = [item.value description];
}
else if ([item.commonKey isEqualToString:@"albumName"]){
_albumLabel.text = [item.value description];
}
else if ([item.commonKey isEqualToString:@"artwork"]){
_coverImageView.image = [UIImage imageWithData:(id)item.value];
}
}
}
- (IBAction)buttonClicked:(UIButton *)sender {
if(MyPlayer.isPlaying){
timer.fireDate = [NSDate distantFuture];
[MyPlayer pause];
//[sender setTitle:@"播放" forState:UIControlStateNormal]? ;
}
else {
timer.fireDate = [NSDate distantPast];
[MyPlayer play];
//[sender setTitle:@"暫停" forState:UIControlStateNormal];
}
}
- (IBAction)prevButtonClicked:(UIButton *)sender {
timer.fireDate = [NSDate distantPast];
myindex --;
if (myindex==0) {
myindex = 5;
}
NSString *filename = [[NSBundle mainBundle] pathForResource:songs[myindex] ofType:@"mp3"];
NSURL *fileUrl = [NSURL fileURLWithPath:filename];
[self updateUI:fileUrl];
MyPlayer = [[AVAudioPlayer alloc]initWithContentsOfURL:fileUrl error:nil];
MyPlayer.volume = 1;
MyPlayer.delegate = self;
[MyPlayer prepareToPlay];
[MyPlayer play];
}
- (IBAction)nextButtonClicked:(UIButton *)sender {
timer.fireDate = [NSDate distantPast];
myindex++;
if (myindex>5) {
myindex = 0;
}
NSString *filename = [[NSBundle mainBundle] pathForResource:songs[myindex] ofType:@"mp3"];
NSURL *fileUrl = [NSURL fileURLWithPath:filename];
[self updateUI:fileUrl];
MyPlayer = [[AVAudioPlayer alloc]initWithContentsOfURL:fileUrl error:nil];
MyPlayer.volume = 1;
MyPlayer.delegate = self;
[MyPlayer prepareToPlay];
[MyPlayer play];
}
- (IBAction)stopButtonClicked:(UIButton *)sender {
timer.fireDate = [NSDate distantFuture];
[MyPlayer stop];
MyPlayer.currentTime = 0;
_playProgressView.progress = 0;
}
@end
文／hither（簡書作者）
原文鏈接：http://www.reibang.com/p/c59b29aaa500
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