Question

Everytime I launch an app, I should to read 5 txt file where are stored some information; then the methods that read and stored data in array from these file should be write in my firstview controller (class of my first view) or in class appdelegate?

Answer 1

In the relevant view controller (probably viewDidLoad).

It would look something like this (untested):

- (void)viewDidLoad {
    NSArray *fileNames = [NSArray arrayWithObjects:@"fileName1.txt", @"fileName2.txt", @"etc", nil];
    NSMutableArray *fileStrings = [[NSMutableArray alloc] init];
    for (int i = 0; i<[fileNames count]; i++) {
        NSString *aFileName = [fileNames objectAtIndex:i];
        NSString *aFilePath = [[NSBundle mainBundle] pathForResource:aFileName];
        NSString *aFileContents = [[NSString alloc] initWithContentsOfFile:aFilePath];
        [fileStrings addObject:aFileContents];
        [aFileContents release];
    }
    myStrings = fileStrings; // Some array to store to
}