解决关于如何实现锁屏后继续播放音乐的问题

// Registers this class as the delegate of the audio session.
[[AVAudioSession sharedInstance] setDelegate: self];
[[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayback error: nil];

UInt32 doSetProperty = 0;
//The C Style function call
AudioSessionSetProperty (
kAudioSessionProperty_OverrideCategoryMixWithOthers,
sizeof (doSetProperty),
&doSetProperty
);

// Activates the audio session.
NSError *activationError = nil;
[[AVAudioSession sharedInstance] setActive: YES error: &activationError];

//alloc a new player
AVAudioPlayer *newPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL: @"your audio file path" error:nil];

//prepare and set delegate
[newPlayer prepareToPlay];
[newPlayer setDelegate:self];

//play audio
[newPlayer play];

//pause or stop audio
[newPlayer pause];
[newPlayer stop];

//restart audio playing
if (newPlayer.playing)
{
[newPlayer pause];
newPlayer.currentTime = 0;
[newPlayer play];
}