本文轉自：http://plter.com/?p=354
本文演示如何使用Objective-C開發播放mp3文件的iPhone程序，當然本文目的不是要讓你做一個iPhone版的播放器，因為這根本用不著你，iPod程序已經很好了。本文的目的是要讓你能夠在自己的游戲中使用音樂。
效果圖如下：
1.打開xcode，創建一個名為TalkingDemo的View-based Application類型的iPhone程序。
2.如果要使用播放聲音的功能，一定要引入AVFoundation庫，右擊項目中的Frameworkds目錄，從菜單中選擇Add->Existing Frameworkd，下圖所示：
此操作將打開瀏覽庫的對話框，我們選擇名為AVFoundation.framework的庫，并把它添加進來。
3.修改TalkingDemoViewController.h文件內容如下：
#import <UIKit/UIKit.h>
#import <AVFoundation/AVFoundation.h>
@interface TalkingDemoViewController : UIViewController {
AVAudioPlayer *player;
}
-(IBAction)sayTalking:(id)sender;
@end
4.雙擊TalkingDemoViewController.xib文件打開InterfaceBuilder，拖入一個Round Rect
Button組件，并將這個組件分別綁定為btn（如果你還不會綁定InterfaceBuilder組件到Objective-C代碼，請看
iPhone按鈕的使用），然后將按鈕的標簽修改為“播放音樂”
5.修改TalkingDemoViewController.m文件的內容如下所示：
#import "TalkingDemoViewController.h"
@implementation TalkingDemoViewController
// Implement viewDidLoad to do additiona l setup after loading the view, typically from a nib.
- (void)viewDidLoad {
if (player) {
[player release];
}
NSString *soundPath=[[NSBundle mainBundle] pathForResource:@"intro" ofType:@"caf"];
NSURL *soundUrl=[[NSURL alloc] initFileURLWithPath:soundPath];
player=[[AVAudioPlayer alloc] initWithContentsOfURL:soundUrl error:nil];
[player prepareToPlay];
[soundUrl release];
[super viewDidLoad];
}
-(IBAction)sayTalking:(id)sender
{
NSLog(@"播放聲音");
[player play];
}
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
return YES;
}
- (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.
}
- (void)viewDidUnload {
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)dealloc {
[player release];
[super dealloc];
}
@end
6.此代碼將播放一個名為 “intro.caf”的文件，請將這個文件加入到資源文件夾(Resources)中.
7.按Command+R運行此程序，嘗試點擊“播放音樂”按鈕，就可以聽到播放的聲音了。
源代碼：http://easymorse-android.googlecode.com/svn/trunk/TalkingDemo/