ios - how to trim or crop music from itunes library -

i grab music user's library audio music fingering. required 30 sec of each songs. how go ? not need save audio using it.

ios audio trimming

trim audio ios

are above 2 links way go ?

thanks reading , appreciated comments.

cheers

to access music user has in device library, use mpmediaitemcollection class. sample code on using (although old , not using arc) can found in apple docs in "add music" sample.

i not sure audio player using, if seek particular point in song or audio file, can using currenttime property in avaudioplayer class, (noted in apple docs).

to implement this, simple as:

youraudioplayer.currenttime = 60; 

this jump song 1 minute mark. not 100% sure on how before song plays, put in play ibaction, before starts playing:

- (ibaction) playorpause: (id) sender {      if (self.player.playing) {          [self.button settitle: @"play" forstate: uicontrolstatehighlighted];         [self.button settitle: @"play" forstate: uicontrolstatenormal];         [self.player pause];      } else {         [self.button settitle: @"pause" forstate: uicontrolstatehighlighted];         [self.button settitle: @"pause" forstate: uicontrolstatenormal];          [self.player.currenttime = 60];  //set seeker here          [self.player play];     }  }  

to stop playback after amount of time (you 30 sec) use nstimer call stop on player after 30 second delay. like:

    [nstimer       scheduledtimerwithtimeinterval:30.0      target:self.player      selector:@selector(stop)      userinfo:nil      repeats:no]; 

if put in ibaction use play, should it!