What's the equivalent of Java's Thread.sleep() in Objective-C/Cocoa?

Question

In Java you can suspend the current thread\'s execution for an amount of time using Thread.sleep(). Is there something like this in Objective-C?

Answer 1

If you use NSThread sleepForTimeInterval(commented code) to sleep, fetching data will be blocked, but +[NSThread sleepForTimeInterval:] (checkLoad method) will not block fetching data.

My example code as below:

- (void)viewDidAppear:(BOOL)animated
{
//....
//show loader view
[HUD showUIBlockingIndicatorWithText:@"Fetching JSON data"];
//    while (_loans == nil || _loans.count == 0)
//    {
//        [NSThread sleepForTimeInterval:1.0f];
//        [self reloadLoansFormApi];
//        NSLog(@"sleep ");
//    }
[self performSelector:@selector(checkLoad) withObject:self afterDelay:1.0f];
}

-(void) checkLoad
{
    [self reloadLoansFormApi];
    if (_loans == nil || _loans.count == 0)
    {
        [self performSelector:@selector(checkLoad) withObject:self afterDelay:1.0f];
    } else
    {
        NSLog(@"size %d", _loans.count);
        [self.tableView reloadData];
        //hide the loader view
        [HUD hideUIBlockingIndicator];
    }
}