xcode - iPhone App Crashes When trying to play video -

i'm trying simple view based app play video, crashes, heres code,

 - (ibaction)playbutton:(id)sender {     nsstring *stringpath = [[nsbundle mainbundle] pathforresource:@"1" oftype:@"mov"];    nsurl *url = [nsurl fileurlwithpath:stringpath];      mpc = [[mpmovieplayercontroller alloc]initwithcontenturl:url];      [mpc setmoviesourcetype:mpmoviesourcetypefile];       [[self view]addsubview:mpc.view];       [mpc setfullscreen:yes];         [mpc play];       }       @end 

and here takes me in xcode when fails

 //  //  main.m  //  video_play  //  //  created nathaniel harman on 20/04/2013.  //  copyright (c) 2013 machupicchumobile. rights reserved.  //   #import <uikit/uikit.h>   #import "videoplayappdelegate.h"   int main(int argc, char *argv[])  {      @autoreleasepool {     return uiapplicationmain(argc, argv, nil, nsstringfromclass([videoplayappdelegate           class])); }  } 

try ,

nsstring *audio=[[nsbundle mainbundle]pathforresource:@"1" oftype:@"mov"];     nsurl *url=[[nsurl alloc]initfileurlwithpath:audio];