问题描述
锁定屏幕后,我需要使用AVAudioPlayer播放简单的声音.我该怎么办
i need to play a simple sound using AVAudioPlayer when screen is locked .How can I do that please help
推荐答案
首先:在您的项目中添加以下框架
First: Add following frameworks into your project
AudioToolbox,CoreAudio,媒体播放器AVFoundation.
AudioToolbox,CoreAudio,MediaPlayerAVFoundation.
第二:将您的info.plist文件添加为新密钥
Second: Add your info.plist file a new key
所需的背景模式=应用播放音频
Required background modes = App plays audio
第三步:创建一个名为keepAwakeForAudio的方法,并在播放音频后立即调用它
Third: Create a method called keepAwakeForAudio and call it just after playing your audio
-(void)keepAwakeForAudio
-(void)keepAwakeForAudio
{ UInt32 sessionCategory = kAudioSessionCategory_MediaPlayback; AudioSessionSetProperty(kAudioSessionProperty_AudioCategory,sizeof(sessionCategory),& sessionCategory); AudioSessionSetActive(true);}
{ UInt32 sessionCategory = kAudioSessionCategory_MediaPlayback; AudioSessionSetProperty (kAudioSessionProperty_AudioCategory, sizeof (sessionCategory), &sessionCategory); AudioSessionSetActive(true);}
//////
NSURL * url = [NSURL fileURLWithPath:[NSString stringWithFormat:@%@/rain1_Rain_on_Street.m4a",[[NSBundle mainBundle] resourcePath]]];
NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/rain1_Rain_on_Street.m4a", [[NSBundle mainBundle] resourcePath]]];
NSError *error;
audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
audioPlayer.numberOfLoops = -1;
if (audioPlayer == nil)
NSLog([error description]);
else
[audioPlayer play];
[self **keepAwakeForAudio**];
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