iOS development--avaudioplayer makes a player with headphones with sound and no speaker sound

1, Reason:

No channel is set;

Avaudiosession is a singleton that can be used directly without instantiation. Avaudiosession plays a very important role in various audio environments.

For different audio scenarios, you need to set different audio answering classes

2, Workaround:

Before initializing the Avaudioplayer, set the channel with the following code:

Avaudiosession *audiosession = [avaudiosession sharedinstance];        [Audiosession setcategory:avaudiosessioncategoryplayback Error:nil];        [Audiosession Setactive:yes Error:nil];  

Just make a record!

iOS development--avaudioplayer makes a player with headphones with sound and no speaker sound