使用按鈕iPhone SDK進行簡單的聲音播放

Question

單擊按鈕后，我已經嘗試了數小時來播放簡單的聲音，但我做不到。 在嘗試了幾本教程之后，我在此鏈接中關注了一個：

http://www.mybringback.com/tutorial-series/1126/xcode-4-tutorial-ios-ipad-iphone-20-playing-sound-with-button/

這是.h文件：

#import <UIKit/UIKit.h>
#import <AudioToolbox/AudioToolbox.h>
@interface soundTestViewController : UIViewController{

}
-(IBAction) playSound;

@end

這是.m文件：

#import "soundTestViewController.h"

@implementation soundTestViewController
-(IBAction) playSound{
    CFBundleRef mainBundle=CFBundleGetMainBundle();
    CFURLRef soundFileURLRef;
    soundFileURLRef =CFBundleCopyResourceURL(mainBundle, (CFStringRef) @"mysound", CFSTR("mp3"), NULL);
    UInt32 soundID;
    AudioServicesCreateSystemSoundID(soundFileURLRef, &soundID);
    AudioServicesPlaySystemSound(soundID);
}

- (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 {
    [super dealloc];
}

@end 

但是，生成結果給出了錯誤：

Build soundTest of project soundTest with configuration Debug

Ld build/Debug-iphonesimulator/soundTest.app/soundTest normal i386
cd /Users/joegeneric/Documents/soundTest
setenv MACOSX_DEPLOYMENT_TARGET 10.6
setenv PATH "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.2 -arch i386 -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk -L/Users/joegeneric/Documents/soundTest/build/Debug-iphonesimulator -F/Users/joegeneric/Documents/soundTest/build/Debug-iphonesimulator -F/Users/joegeneric/Documents/soundTest -filelist /Users/joegeneric/Documents/soundTest/build/soundTest.build/Debug-iphonesimulator/soundTest.build/Objects-normal/i386/soundTest.LinkFileList -mmacosx-version-min=10.6 -Xlinker -objc_abi_version -Xlinker 2 -framework Foundation -framework UIKit -framework CoreGraphics -framework AVFoundation -framework AudioToolbox -o /Users/joegeneric/Documents/soundTest/build/Debug-iphonesimulator/soundTest.app/soundTest

ld: warning: in /Users/joegeneric/Documents/soundTest/AVFoundation.framework/AVFoundation, missing required architecture i386 in file
ld: warning: in /Users/joegeneric/Documents/soundTest/AudioToolbox.framework/AudioToolbox, missing required architecture i386 in file
Undefined symbols:
  "_AudioServicesPlaySystemSound", referenced from:
      -[soundTestViewController playSound] in soundTestViewController.o
  "_AudioServicesCreateSystemSoundID", referenced from:
      -[soundTestViewController playSound] in soundTestViewController.o
ld: symbol(s) not found

您能否顯示我做錯了什么，或者在iPhone SDK中播放聲音方面有任何其他更簡單的工作教程？

Answer 1

[除了massimobio的正確答案]

您提供的教程鏈接提到了適用於iOS的Xcode 4，但是“構建結果”中的“ setenv MACOSX_DEPLOYMENT_TARGET 10.6”行指示您的部署目標為Mac。

您需要將Project Build Architecture更改為iOS，並檢查您的目標是IOS，而不是OSX。

例如，要更改構建體系結構，請單擊項目，然后選擇構建設置以顯示基本SDK。

另外，您的IBAction缺少發送者。 應該在您的控制器頭文件中將其聲明為

-(IBAction) playSound:(id)sender;

並在您的Controller .m文件中實現為

-(IBAction) playSound:(id)sender {
  // your code here
}

另外，不要忘記使用control-drag將代碼中的IBAction鏈接到XIB，以創建一個操作目標對。

播放聲音的最簡單演示是SysSound。 如果您搜索Xcode文檔或通過Apple Developer網站的“示例代碼”下可用。

Answer 2

您是否將AudioToolbox框架添加到Target中，並將其導入您的代碼中？

#import <AudioToolbox/AudioToolbox.h>