iphone - 调用AudioServicesPlaySystemSound时出现2个错误？

Question

我正在制作一个应用程序，一旦计时器达到一定限制，它就会振动。

但是，当调用时

AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);

Xcode 出现两个错误:

Undefined symbols for architecture i386:
  "_AudioServicesPlaySystemSound", referenced from:
      -[drawGraph drawRect:] in drawGraph.o
ld: symbol(s) not found for architecture i386

和

clang: error: linker command failed with exit code 1 (use -v to see invocation)

关于导致这些错误的原因有什么想法吗？

Answer 1

如果您根本不能仅添加头文件(如上所示)，则必须将框架添加到您的项目中。你应该有一个以下标题。 #import <AudioToolbox/AudioToolbox.h>

1. In Xcode, click your project file at the top of the Project Navigator.

2. Click 'YourProjectName' under "Targets"

3. Click the "Build Phases" tab.

4. Click the plus in the "Link Binary With Libraries" window.

5. Add the AudioToolbox.Framework library

6. Add #import <AudioToolbox/AudioToolbox.h>