Activity indicator (spinner) with UIActivityIndicatorView

Question

I have a tableView that loads an XML feed as follows:

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];

    if ([stories count] == 0) {         


        

Answer 1

Starting a new thread can be overkilling and a source of complexity if you want to do things that are supposed to start on the main thread.

In my own code, I need to start a MailComposer by pushing a button but it can take some time to appear and I want to make sure the UIActivityIndicator is spinning meanwhile.

This is what I do :

-(void)submit_Clicked:(id)event { [self.spinner startAnimating]; [self performSelector:@selector(displayComposerSheet) withObject:nil afterDelay:0]; }

It will queue displayComposerSheet instead of executing it straight away. Enough for the spinner to start animating !