Question

Is there a way to do multiple actions respectively using the : performSelector:withObject:afterDelay code ?
Sample code will be appreciated ,
Thanks in advance.

Answer 1

Or use blocks. If you start to type dispatch_after, you’ll see code completion that will pop up the following snippet of code, and then you can put however many actions you want in that block. In this example, I’m showing it being used inside an IBAction:

- (IBAction)pushedSomeButton:(id)sender
{
    // anything you want to do immediate, do here

    [self doingSomethingRightNow];

    // anything you want to defer for some time, do inside the dispatch_after block
    // in this example, calling callAnotherMethod and whyNotCallAnotherMethod

    int64_t delayInSeconds = 2.0;
    dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);
    dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
        [self callAnotherMethod];
        [self whyNotCallAnotherMethod];
    });
}