Try this
CGRect spinnerFrame = //frame of spinner
UIImageView *spinner = [[UIImageView alloc] initWithFrame:spinnerFrame];
spinner.animationImages = [NSArray arrayWithObjects:
[UIImage imageNamed:@"spin8.png"],
[UIImage imageNamed:@"spin7.png"],
[UIImage imageNamed:@"spin6.png"],
[UIImage imageNamed:@"spin5.png"],
[UIImage imageNamed:@"spin4.png"],
[UIImage imageNamed:@"spin3.png"],
[UIImage imageNamed:@"spin2.png"],
[UIImage imageNamed:@"spin1.png"],
nil];
[self.tableView addSubview:spinner];
[spinner startAnimating];