if loop that running asynchoursly

Question

Hello everyone, I want to create if loop that running asynchoursly with this code:

NSString *care = [[NSString alloc] initWithContentsOfURL:[NSURL URLWithString:@"http://localhost/untitled.txt"]];
if (care == @"ONRED") { //untitled.txt = ONRED
   [red_on setHidden:NO];
   [red_off setHidden:YES];
}

How I can run the if statement like a loop?

I dont no. there are vay to run void asynchrously? – theShay Mar 09 '12 at 11:11 — theShay, Mar 09 '12 at 11:11

score 1 · Accepted Answer · edited May 23 '17 at 12:12

If I get you right, you can put those statements in a method and call performSelectorInBackground:

(void)asyncMethod {
    NSString *care = [[NSString alloc] initWithContentsOfURL:[NSURL URLWithString:@"http://localhost/untitled.txt"]];
    if (care == @"ONRED") { //untitled.txt = ONRED
        [red_on setHidden:NO];
        [red_off setHidden:YES];
    }
}

// in some other method
[self performSelectorInBackground:@selector(asyncMethod) withObject:nil];

Another option is to use the grand central dispatch (as described in this answer):

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 
                                         (unsigned long)NULL), ^(void) {
    NSString *care = [[NSString alloc] initWithContentsOfURL:[NSURL URLWithString:@"http://localhost/untitled.txt"]];
        if (care == @"ONRED") { //untitled.txt = ONRED
            [red_on setHidden:NO];
            [red_off setHidden:YES];
        }
});

if loop that running asynchoursly

1 Answers1