Read Text file Programmatically using Objective-C

The files in your “Resource folder” are actually the contents of your application bundle. So first you need to get the path of the file within your application bundle.

NSString* path = [[NSBundle mainBundle] pathForResource:@"filename" 
                                                 ofType:@"txt"];

Then loading the content into a NSString is even easier.

NSString* content = [NSString stringWithContentsOfFile:path
                                              encoding:NSUTF8StringEncoding
                                                 error:NULL];

As a bonus you can have different localized versions of filename.txt and this code will fetch the file of the currently selected language correctly.