Activity Indicator Tutorial (Storyboard)

Step 1 -
               Add 2 buttons to the main view and Give them a title of start and stop.
Step 2 -
              Add Activity Indicator to the center of the view.
              Select the Activity Indicator and go to the Attributes Inspector.
              Give the Activity Indicator a style of Large
              White and a color if yellow. select the "Hides when stopped" option.
Step 3 -
              Create Outlet in ViewController.m. and  IBAction Method

           ViewController.m

      @interface ViewController ()

      @property (weak, nonatomic) IBOutlet UIActivityIndicatorView *activityIndicatorView;

      - (IBAction)startSpinning:(UIButton *)sender;
      - (IBAction)stopSpinning:(UIButton *)sender;

     @end

   Implementing created method

     - (IBAction)startSpinning:(UIButton *)sender {
          [self.activityIndicatorView startAnimating];
     }

     - (IBAction)stopSpinning:(UIButton *)sender {
      [self.activityIndicatorView stopAnimating];
   }