iOS program supports headphone line control

1, allow remote events to be accepted

[[UIApplication sharedapplication] beginreceivingremotecontrolevents];
[Self becomefirstresponder];

This sentence is important, otherwise some devices do not respond

-(BOOL) Canbecomefirstresponder {

return YES;

}

2, Handling Input events:

-(void) Remotecontrolreceivedwithevent: (uievent *) receivedevent {

if (Receivedevent.type = = Uieventtyperemotecontrol)

{

Switch (receivedevent.subtype) {

Case Uieventsubtyperemotecontroltoggleplaypause:

Do something

Break

Case Uieventsubtyperemotecontrolprevioustrack:

Do something

Break

Case Uieventsubtyperemotecontrolnexttrack:

Do something

Break

Default

Break

}

}

3, stop accepting remote events at the end of use

[[UIApplication sharedapplication] endreceivingremotecontrolevents];
[Self resignfirstresponder];

4, enclose the complete event type code for everyone to use

typedef enum {

Uieventsubtypenone = 0,

Uieventsubtypemotionshake = 1,

Uieventsubtyperemotecontrolplay = 100,

Uieventsubtyperemotecontrolpause = 101,

Uieventsubtyperemotecontrolstop = 102,

Uieventsubtyperemotecontroltoggleplaypause = 103,

Uieventsubtyperemotecontrolnexttrack = 104,

Uieventsubtyperemotecontrolprevioustrack = 105,

Uieventsubtyperemotecontrolbeginseekingbackward = 106,

Uieventsubtyperemotecontrolendseekingbackward = 107,

Uieventsubtyperemotecontrolbeginseekingforward = 108,

Uieventsubtyperemotecontrolendseekingforward = 109,

} Uieventsubtype;

Okay, so here's the use of headphone mode.