[英]The volume of AVAudioPlayer is not as same as the system volume
我使用AVAudioPlayer播放聲音,但有時音量變得很低,與系統音量不一樣。 當我通過按音量按鈕更改系統音量時,它變為正常。 它是怎么發生的?
代碼如下:
- (void)prepareAudioSession {
AVAudioSession *session = [AVAudioSession sharedInstance];
NSError *setCategoryError = nil;
if (![session setCategory:AVAudioSessionCategoryPlayback
withOptions:AVAudioSessionCategoryOptionMixWithOthers
error:&setCategoryError]) {
// handle error
}
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
NSError *error = nil;
BOOL result = [audioSession setActive:YES withOptions:0 error:&error];
if (!result && error) {
// deal with the error
}
}
- (void)playWithAudioPath:(NSString *)path {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^(void) {
NSError *error;
NSURL *audioFileURL = [NSURL fileURLWithPath:path];
self.audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:audioFileURL error:&error];
audioPlayer.delegate = self;
if (error == nil) {
[self prepareAudioSession];
[audioPlayer setCurrentTime:0];
[audioPlayer play];
}
else {
NSLog(@"%@", error.description);
}
});}
您尚未調用[audioPlayer setVolume: 1.0];
在代碼中設置音量。
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