iWillApps

To check whether a file exists is very simple in Objective C, simply create an NSFileManager object, then feed the NSString of the file directory to the fileExistsAtPath method in the NSFileManager object.

NSString* myFileTxt = [[NSBundle mainBundle] pathForResource:@"myFile"
                                             ofType:@"txt"];
NSFileManager* fileManager = [NSFileManager defaultManager];
if(![fileManager fileExistsAtPath:myFileTxt])
{
// file doesn't exist
}