Can't access local resource with NSURL. Strange

Question

My iOS app wants to play a local audio file. So, in xCode, I’ve added a file "audio.m4a" to my project. It resides on the top level of the file tree, but

    NSURL *audioFileURL = [[NSBundle mainBundle] 
URLForResource:@"audio" 
withExtension:@"m4a"];

returns nil. There must be a stupid oversight. What am I doing wrong?

Answer 1

NSBundle *mainBundle = [NSBundle mainBundle];
NSString *myFile = [mainBundle pathForResource: @"audio" ofType: @"m4a"];
NSURL *audioFileURL = [NSURL URLWithString:myFile];

and check whether that file present in Build Phases" -> "copy bundle Resources"