播放音频声音文件

iphone开发中播放声音文件主要使用AVAudioPlayer 类，它的功能非常强大支持播放音频的格式也非常的多，我们可以把它看成一个高级的音乐播放器，它支持的播放格式有

AVAudioPlayer 是 AVFoundation.framework 中定义的一个类，所以使用要先在工程中引入AVFoundation.framework 如图所示点击”+”号将AVFoundation导入。

将音频文件放入资源文件夹中

下面我开始介绍代码中如何调用AVAudioPlayer 播放音频文件

声明类

//
//  playSoundViewController.h
//  playSound
//
//  Created by  宣雨松 on 11-7-10.
//  Copyright 2011年 __MyCompanyName__. All rights reserved.
//#import <UIKit/UIKit.h>
#import <AVFoundation/AVFoundation.h>
@interface playSoundViewController : UIViewController {IBOutlet UIButton * playSound;//播放音乐  IBOutlet UIButton * playPause;//播放暂停  IBOutlet UIButton * playStop;//播放停止  //定义一个声音的播放器AVAudioPlayer *player;
}-(IBAction)playSoundPressed:(id)pressed;
-(IBAction)playPausePressed:(id)pressed;
-(IBAction)playStopPressed:(id)pressed;
@end

实现类

//
//  playSoundViewController.m
//  playSound
//
//  Created by  宣雨松 on 11-7-10.
//  Copyright 2011年 __MyCompanyName__. All rights reserved.
//#import "playSoundViewController.h"@implementation playSoundViewController- (void)dealloc
{[super dealloc];//程序的严谨性 在显示对象关闭后把相应的对象清空//时刻谨记[playSound release];[player release];
}- (void)didReceiveMemoryWarning
{// Releases the view if it doesn't have a superview.[super didReceiveMemoryWarning];// Release any cached data, images, etc that aren't in use.
}#pragma mark - View lifecycle// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{[super viewDidLoad];//在这里实现声音的播放代码//找到mp3在资源库中的路径 文件名称为sound 类型为mp3NSString *path = [[NSBundle mainBundle] pathForResource:@"sound" ofType:@"mp3"];//在这里判断以下是否能找到这个音乐文件if (path) {//从path路径中 加载播放器player = [[AVAudioPlayer alloc]initWithContentsOfURL:[[NSURL alloc]initFileURLWithPath:path]error:nil];//初始化播放器[player prepareToPlay];//设置播放循环次数，如果numberOfLoops为负数 音频文件就会一直循环播放下去player.numberOfLoops = -1;//设置音频音量 volume的取值范围在 0.0为最小 0.1为最大 可以根据自己的情况而设置player.volume = 0.5f;NSLog(@"播放加载");}}-(void)playSoundPressed:(id)pressed
{//点击按钮后开始播放音乐//当player有值的情况下并且没有在播放中 开始播放音乐if (player) {if (![player isPlaying]) {[player play];NSLog(@"播放开始");}}
}-(void)playPausePressed:(id)pressed
{//暂停播放声音if (player) {if ([player isPlaying]) {[player pause];NSLog(@"播放暂停");}}
}-(void)playStopPressed:(id)pressed
{//停止播放声音if (player) {if ([player isPlaying]) {[player stop];NSLog(@"播放停止");}}
}- (void)viewDidUnload
{[super viewDidUnload];// Release any retained subviews of the main view.// e.g. self.myOutlet = nil;
}- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{// Return YES for supported orientationsreturn (interfaceOrientation == UIInterfaceOrientationPortrait);
}@end

原文链接：http://blog.csdn.net/xys289187120/article/details/6595919