.m file to string - objective-c

Question

I am trying to convert a .m file to string. I will search for files in a folder and then want to use each of its contents as a string. This is the code I am using:
- (IBAction)searchAction:(id)sender {
NSFileManager *fm = [NSFileManager defaultManager];
NSArray *dirContents = [fm contentsOfDirectoryAtPath:folderLabel.stringValue error:nil];
NSPredicate *fltr = [NSPredicate predicateWithFormat:#"self ENDSWITH '.m'"];
NSArray *onlyMs = [dirContents filteredArrayUsingPredicate:fltr];
for (int i=0; i<[onlyMs count]; i++) {
NSString* text = [[NSString alloc] initWithContentsOfFile:[onlyMs objectAtIndex:i]
encoding:NSUTF8StringEncoding
error:nil];
NSLog(#"string: %#", text);
}
}
2013-02-13 02:38:05.700 LocalizedStringSearch[19001:303] string: (null)
Except here, all the log is returning is null even though it will find all the .m file correctly.
Anyone know what I'm doing wrong?
Thanks a lot!

Answer 1

I think contentsOfDirectoryAtPath: gives you an array of filenames only, not full path names, so you need to prepend the path before you open files. EDIT: I think I might be confusing that with enumeratorAtPath:... if so continue using the filenames you have rather than appending them to the original folder name.
Here's an example (untested):
NSString *fullPath = [folderLabel.stringValue stringByAppendingPathComponent:[onlyMs objectAtIndex:i];
NSError *error = nil;
NSString *text = [[NSString alloc] initWithContentsofFile:fullPath
encoding:NSUTF8StringEncoding
error:&error];
if (text == nil)
NSLog(#"%#", error);
else
NSLog(#"%#", text);
The above will only work if the files actually are encoded using UTF-8. If you are unsure of the encoding, you can let the framework try and figure it out for you with:
NSString *fullPath = [folderLabel.stringValue stringByAppendingPathComponent:[onlyMs objectAtIndex:i];
NSError *error = nil;
NSStringEncoding enc;
NSString *text = [[NSString alloc] initWithContentsofFile:fullPath
usedEncoding:&enc
error:&error];
if (text == nil)
NSLog(#"%#", error);
else
NSLog(#"%#", text);