我有两个不同的按键声音动作.当我按下一个按钮时它应该播放一个声音,当我按下另一个声音时,它应该停止第一个声音然后播放另一个声音,我该怎么做？
谢谢,
-(void) onButtonPressAlbina {
[soundID2 stop];
NSString *soundPath = [[NSBundle mainBundle] pathForResource:@"albina" ofType:@"m4a"];
SystemSoundID soundID;
AudioServicesCreateSystemSoundID((__bridge CFURLRef)[NSURL fileURLWithPath: soundPath],&soundID);
AudioServicesPlaySystemSound (soundID);
}
-(void) onButtonPressBalena {
NSString *soundPath = [[NSBundle mainBundle] pathForResource:@"balena" ofType:@"m4a"];
SystemSoundID soundID;
AudioServicesCreateSystemSoundID((__bridge CFURLRef)[NSURL fileURLWithPath: soundPath],&soundID);
AudioServicesPlaySystemSound (soundID);
}
解决方法
你无法阻止通过“AudioServicesPlaySystemSound”播放的声音,但你可以做的是使用“AVAudioPlayer”.
在对象中保留对“AVAudioPlayer”的引用,然后在需要暂停时可以在其上调用“stop“.
玩
#import <AudioToolBox/AudioToolBox.h> #import <AVFoundation/AVAudioPlayer.h> AVAudioPlayer *player; // ... NSString *path; NSError *error; path = [[NSBundle mainBundle] pathForResource:@"albina" ofType:@"m4a"]; if ([[NSFileManager defaultManager] fileExistsAtPath:path]) { player = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:&error]; player.volume = 0.5f; [player prepareToPlay]; [player setNumberOfLoops:0]; [player play]; }
停止
if (player != nil)
{
if (player.isPlaying == YES)
[player stop];
}