我想通过使用循环播放多个文件。
我下面写代码..
请帮我。！！..
soundList = [[NSArray alloc] initWithObjects:@"mySong1.mp3",@"mySong2.mp3",@"mySong3.mp3",@"mySong4.mp3",@"mySong5.mp3",@"mySong6.mp3",@"mySong7.mp3",@"mySong8.mp3",@"mySong9.mp3", nil];
for (i=0; i<=([soundList count] - 1); ) {
while(i<[soundList count]){
NSLog(@"File is : %@",[soundList objectAtIndex:i]);
mediaPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:[[NSURL alloc] initFileURLWithPath:[[NSBundle mainBundle] pathForResource:[soundList objectAtIndex:i] ofType:nil]] error:&error];
[mediaPlayer setDelegate:self];
self.lblCurrentSongName.text = [soundList objectAtIndex:i];
[mediaPlayer prepareToPlay];
i++;
}
}
请给我建议。!!
我要给你一个指引做，但要注意它没有经过测试的代码。 你给不用于多种原因工作的代码，1。你不叫上avaudioplayer 2.边玩边循环将执行太快，歌曲将相互重叠或因为你不存储参考以往avaudioplayer它可能会制造麻烦（不知道到底）
NSInteger currentSoundsIndex; //Don't forget to set this in viewDidLoad or elsewhere
//In viewDidLoad add this line
{
...
currentSoundsIndex = 0;
...
}
-(void) playCurrentSong
{
NSError *error;
mediaPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:[[NSURL alloc] initFileURLWithPath:[[NSBundle mainBundle] pathForResource:[soundList objectAtIndex:currentSoundsIndex] ofType:nil]] error:&error];
if(error !=nil)
{
NSLog(@"%@",error);
//Also possibly increment sound index and move on to next song
}
else
{
self.lblCurrentSongName.text = [soundList objectAtIndex:currentSoundsIndex];
[mediaPlayer setDelegate:self];
[mediaPlayer prepareToPlay]; //This is not always needed, but good to include
[mediaPlayer play];
}
}
//This is the delegate method called after the sound finished playing, there are also other methods be sure to implement them for avoiding possible errors
- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag
{
//Increment index but don't go out of bounds
currentSoundsIndex = ++currentSoundsIndex % [soundList count];
[self playCurrentSong];
}
有可能不是最完美的解决方案，但是在这里你会发现一个共同的想法。 这是一个完全工作的代码，你可以复制/粘贴在你的项目，它应该工作。 当然，你必须改变文件名，为您的。 让我知道，如果你有任何问题。
#import "MainViewController.h"
#import <AVFoundation/AVFoundation.h>
@interface MainViewController () <AVAudioPlayerDelegate>
@property (nonatomic, strong) AVAudioPlayer *audioPlayer;
@property (nonatomic, strong) NSMutableArray *soundsPathsList;
@property (nonatomic, assign) NSInteger curSoundIdx;
@end
@implementation MainViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
NSArray *soundList = [[NSArray alloc] initWithObjects:@"myAudioFile 1", @"myAudioFile 2", @"myAudioFile 3",
@"myAudioFile 4", @"myAudioFile 5", @"myAudioFile 6", @"myAudioFile 7",
@"myAudioFile 8", @"myAudioFile 9", @"myAudioFile 10", nil];
self.soundsPathsList = [NSMutableArray new];
for (NSString *fileName in soundList) {
NSString *pathToFile = [[NSBundle mainBundle] pathForResource:fileName ofType:@"mp3"];
NSURL *url = [NSURL fileURLWithPath:pathToFile];
[self.soundsPathsList addObject:url];
}
[self playNext];
}
return self;
}
- (void) playNext {
if (self.curSoundIdx >= [self.soundsPathsList count]) {
self.curSoundIdx = 0;
}
// destroy player object
[self.audioPlayer stop];
self.audioPlayer = nil;
// create new player object
self.audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:
[self.soundsPathsList objectAtIndex:self.curSoundIdx] error:nil];
self.audioPlayer.delegate = self;
[self.audioPlayer play];
self.curSoundIdx++;
}
#pragma mark - AVAudioPlayerDelegate
- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag {
[self playNext];
}
@end
首先声明
AVAudioPlayer * audioPlayer;
NSMutableArray的* audioQueue;
然后用下面的代码
-(void) addToPlayerQueue: (NSString *) file {
if ( [audioQueue count] == 0 )
{
[audioQueue addObject:file];
[self playSound: file];
}
else
{
[audioQueue addObject:file];
}
}
-(void) playSound : (NSString *) soundFile
{
NSURL *soundUrl = [NSURL fileURLWithPath: [[NSBundle mainBundle] pathForResource:soundFile ofType:@"caf"]];
if ( soundUrl ) {
audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:soundUrl error:nil];
[audioPlayer setDelegate:self];
[audioPlayer setVolume: playerVolume];
[audioPlayer play];
}
}
#pragma mark -
#pragma mark AVAudioPlayer Delegate Method
- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag {
NSLog(@"Just got done playing %@", [audioQueue objectAtIndex:0]);
[audioPlayer release];
[audioQueue removeObjectAtIndex:0];
if ( [audioQueue count] > 0 )
{
NSString *file = [audioQueue objectAtIndex:0];
[self playSound:file];
}
}
simply do it by using recursion ..
@property (nonatomic, strong) NSArray *arrTrackList;
@property (nonatomic, strong) NSMutableArray *arrAduioQueue;
@property (nonatomic, strong) AVAudioPlayer *audioPlayer;
@property (nonatomic) NSUInteger itemIndex;
@end
@implementation PLayMultipleTrackViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.arrTrackList = [NSArray arrayWithObjects:@"apple_ring",@"shukriya_pakistan",@"pakistan_anthem", nil];
self.itemIndex = 0;
}
- (IBAction)TrackToPlay:(id)sender
{
self.btnPlayAll.enabled = NO;
NSString *trackFile = [self.arrTrackList objectAtIndex:self.itemIndex];
[self AddToPlayList:trackFile];
}
-(void)AddToPlayList:(NSString *)file
{
[self.arrAduioQueue addObject:file];
[self playTrack:file];
}
-(void)playTrack:(NSString *)soundFile
{
NSString *soundFilePath =[[NSBundle mainBundle] pathForResource: soundFile ofType: @"m4r"];
NSURL *fileURL = [[NSURL alloc] initFileURLWithPath: soundFilePath];
self.audioPlayer =[[AVAudioPlayer alloc] initWithContentsOfURL: fileURL error: nil];
[self.audioPlayer prepareToPlay];
[self.audioPlayer setDelegate:self];
self.audioPlayer.volume = 1.0;
[self.audioPlayer play];
}
-(void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag
{
[self.arrAduioQueue removeObjectAtIndex:0];
self.itemIndex++;
NSUInteger trackListIndex = [self.arrTrackList count];
if (self.itemIndex < trackListIndex)
{
NSString *nextTrack = [self.arrTrackList objectAtIndex:self.itemIndex];
[self AddToPlayList:nextTrack];
}
else
{
NSLog(@"PLaylist empty");
}
}
@end
