Add and read a json file in the iPhone app

Question

I have created a simple Xcode 4.2 project with a empty view controller. I added a json file to this project (i not had a resouces folder/group and so i have create these resouces folder and group). So, in my iphone simulator i can read this json file correctly. When i have tested my example app on my device I had a error: i can't read the json file: Why? I use this simple code lines:

NSString *filePath = [[NSBundle mainBundle] pathForResource:CONFIGURATION_FILE_NAME ofType:CONFIGURATION_FILE_TYEPE]; 
NSString *jsonString = [[NSString alloc] initWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error: NULL];

Answer 1

I have solved... in my code the CONFIGURATION_FILE_TYEPE is a define @"JSON".. i have changed this with @"json".. this work well on device and simulator!