objective c - Sound not playing in iOS Simulator. No errors -

i have constructed code supposed play audio when button clicked. there no errors in code, when open ios simulator , press button, no sound plays. button tap animation, nothing happens. have both avfoundation , audiotoolbox frameworks. have audio file in resources. not using breakpoints. button set use 'playaudio:' first responder upon touch inside.

here 'viewcontroller.h' file:

#import <uikit/uikit.h> #import <audiotoolbox/audiotoolbox.h> #import <avfoundation/avfoundation.h>  @interface viewcontroller : uiviewcontroller  @property (strong, nonatomic) avaudioplayer *audioplayer; - (ibaction)playaudio:(id)sender;  @end 

and here 'viewcontroller.m' file:

#import "viewcontroller.h" #import <avfoundation/avfoundation.h> #import <audiotoolbox/audiotoolbox.h>  @interface viewcontroller ()  @end  @implementation viewcontroller  - (ibaction)playaudio:(id)sender {     avaudioplayer *audioplayer;     nsstring *audiopath = [[nsbundle mainbundle] pathforresource:@"audiofile" oftype:@"wav"];     nsurl *audiourl = [nsurl fileurlwithpath:audiopath];     audioplayer = [[avaudioplayer alloc] initwithcontentsofurl:audiourl error:nil];     [audioplayer play];     sleep(5); };  -(void)viewdidload {     [super viewdidload];     // additional setup after loading view, typically nib. }  - (void)didreceivememorywarning {     [super didreceivememorywarning];     // dispose of resources can recreated. } @end 

the audio segment 3 seconds.

any appreciated! thanks!

i quite new ios had same problem , able fix it.

i declared avaudioplayer variable global variable , called

[audioplayer preparetoplay]; 

before

[audioplayer play]; 

just calling preparetoplay didnt fix it, had declare global variable work. not sure why makes difference simulator works now.