你如何让iPhone发出哔哔声? [英] How do you make an iPhone beep?
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问题描述
什么代码允许我在iPhone上产生标准的哔声?
What code allows me to produce a standard beep sound on the iPhone?
推荐答案
那取决于什么样的声音你想要的。
Well it depends on what kind of sound you want.
以下是使用AVFoundation音频框架播放声音的方法。
Here's how to play a sound using the AVFoundation audio framework.
#import <UIKit/UIKit.h>
@class AVAudioPlayer;
@interface AudioPlayer : UIViewController {
IBOutlet UIButton *playButton;
IBOutlet UIButton *stopButton;
AVAudioPlayer *audioPlayer;
}
@property (nonatomic, retain) IBOutlet UIButton *playButton;
@property (nonatomic, retain) IBOutlet UIButton *stopButton;
@property (nonatomic, retain) AVAudioPlayer *audioPlayer;
-(IBAction)play;
-(IBAction)stop;
@end
- (void)viewDidLoad {
[super viewDidLoad];
// Get the file path to the song to play.
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"TNG_Theme"
ofType:@"mp3"];
// Convert the file path to a URL.
NSURL *fileURL = [[NSURL alloc] initFileURLWithPath:filePath];
//Initialize the AVAudioPlayer.
self.audioPlayer = [[AVAudioPlayer alloc]
initWithContentsOfURL:fileURL error:nil];
// Preloads the buffer and prepares the audio for playing.
[self.audioPlayer prepareToPlay];
[filePath release];
[fileURL release];
}
-(IBAction)play {
// Make sure the audio is at the start of the stream.
self.audioPlayer.currentTime = 0;
[self.audioPlayer play];
}
-(IBAction)stop {
[self.audioPlayer stop];
}
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