Play silent audio test on iOS background run is possible

If you call back, you'll be unlucky.

Make Silent audio.

@interface Appdelegate ()

{

Nsinteger count;

}

@property (Strong, nonatomic) Nstimer *mtimer;

@property (Assign, nonatomic) Uibackgroundtaskidentifier Backiden;

-(void) Applicationdidenterbackground: (uiapplication *) Application {

_mtimer = [Nstimer scheduledtimerwithtimeinterval:1 target:self selector: @selector (countaction) Userinfo:nil repeats: YES];

[[Nsrunloop Currentrunloop] Addtimer:_mtimer formode:nsrunloopcommonmodes];

[Self begintask];

}

Timing

-(void) countaction{

NSLog (@ "%li", count++);

}

Application background

-(void) Begintask

{

NSLog (@ "begin=============");

_backiden = [[UIApplication sharedapplication] beginbackgroundtaskwithexpirationhandler:^{

NSLog (@ "will hang =============");

[Self endback];

}];

}

Logoff background

-(void) Endback

{

NSLog (@ "end=============");

[[UIApplication sharedapplication] endbackgroundtask:_backiden];

_backiden = Uibackgroundtaskinvalid;

}

-(void) Applicationwillenterforeground: (uiapplication *) Application {

[Self endback];

}

#import <AVFoundation/AVFoundation.h>

@property (Strong, nonatomic) Avaudioplayer *mplayer;

@property (Assign, nonatomic) CGFloat mCount;

-(void) Viewdidload {

[Super Viewdidload];

_mcount = 0;

Nstimer *timer = [Nstimer scheduledtimerwithtimeinterval:10 target:self selector: @selector (counttime) Userinfo:nil Repeats:yes];

[[Nsrunloop Currentrunloop] Addtimer:timer formode:nsrunloopcommonmodes];

}

-(void) counttime{

_mcount+=10;

NSLog (@ "%f", _mcount);

if ([[UIApplication sharedapplication] backgroundtimeremaining] < 60.) {//When the remaining time is less than 60 o'clock, open as playing music, and use this fake foreground status again apply backstage

NSLog (@ "Play%@", [Nsthread CurrentThread]);

[Self playmusic];

Application background

[[UIApplication Sharedapplication] beginbackgroundtaskwithexpirationhandler:^{

NSLog (@ "I'm going to hang up");

}];

}

}

-(void) playmusic{

1. The URL path of the audio file, actually developed, with silent music

Nsurl *url=[[nsbundle mainbundle]urlforresource:@ "Wusheng.mp3" withextension:nil];

2. Create player (note: One avaudioplayer can only play one URL)

_mplayer=[[avaudioplayer Alloc]initwithcontentsofurl:url Error:nil];

3. Buffering

[_mplayer Preparetoplay];

_mplayer.numberofloops =-1;

4. Play

[_mplayer play];

}

Play silent audio test on iOS background run is possible