播放音頻聲音文件

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iphone開發(fā)中播放聲音文件主要使用AVAudioPlayer 類，它的功能非常強(qiáng)大支持播放音頻的格式也非常的多，我們可以把它看成一個(gè)高級(jí)的音樂播放器，它支持的播放格式有

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AVAudioPlayer 是 AVFoundation.framework 中定義的一個(gè)類，所以使用要先在工程中引入AVFoundation.framework 如圖所示點(diǎn)擊”+”號(hào)將AVFoundation導(dǎo)入。

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將音頻文件放入資源文件夾中

下面我開始介紹代碼中如何調(diào)用AVAudioPlayer 播放音頻文件

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聲明類

      //
//  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;//播放音樂  
 IBOutlet UIButton * playPause;//播放暫停  
 IBOutlet UIButton * playStop;//播放停止  
 //定義一個(gè)聲音的播放器
 AVAudioPlayer *player;
}
 
-(IBAction)playSoundPressed:(id)pressed;
-(IBAction)playPausePressed:(id)pressed;
-(IBAction)playStopPressed:(id)pressed;
@end
    

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實(shí)現(xiàn)類

      //
//  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];
 //程序的嚴(yán)謹(jǐn)性 在顯示對象關(guān)閉后把相應(yīng)的對象清空
 //時(shí)刻謹(jǐn)記
 [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];
 //在這里實(shí)現(xiàn)聲音的播放代碼
 //找到mp3在資源庫中的路徑 文件名稱為sound 類型為mp3
 NSString *path = [[NSBundle mainBundle] pathForResource:@"sound" ofType:@"mp3"];
 //在這里判斷以下是否能找到這個(gè)音樂文件
 if (path) {
 //從path路徑中 加載播放器
 player = [[AVAudioPlayer alloc]initWithContentsOfURL:[[NSURL alloc]initFileURLWithPath:path]error:nil];
 //初始化播放器
 [player prepareToPlay];
 
 //設(shè)置播放循環(huán)次數(shù)，如果numberOfLoops為負(fù)數(shù) 音頻文件就會(huì)一直循環(huán)播放下去
 player.numberOfLoops = -1;
 
 //設(shè)置音頻音量 volume的取值范圍在 0.0為最小 0.1為最大 可以根據(jù)自己的情況而設(shè)置
 player.volume = 0.5f;
 
 NSLog(@"播放加載");
 }
 
}
 
-(void)playSoundPressed:(id)pressed
{
 //點(diǎn)擊按鈕后開始播放音樂
 //當(dāng)player有值的情況下并且沒有在播放中 開始播放音樂
 if (player) 
 {
 if (![player isPlaying]) 
 {
 [player play];
 NSLog(@"播放開始");
 }
 }
}
 
-(void)playPausePressed:(id)pressed
{
 //暫停播放聲音
 if (player) {
 if ([player isPlaying]) {
 [player pause];
 NSLog(@"播放暫停");
 }
 }
}
 
-(void)playStopPressed:(id)pressed
{
 //停止播放聲音
 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 orientations
 return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
 
@end
    

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原文鏈接： http://blog.csdn.net/xys289187120/article/details/6595919

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