Using UIActivityIndicatorView

Overview

There is a built in loading indicator called UIActivityIndicatorView that you can use to display loading status. Follow the steps below to use the UIActivityIndicatorView

Step 1: Create the UIActivityIndicatorView

You can either drag the UIActivityIndicator view into your nib file or create it programatically.

Example 1: Creating via Interface Builder

Example 2: Creating programatically

- (void)viewDidLoad {
   [super viewDidLoad];

   UIActivityIndicatorView *indicatorView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];
   indicatorView.center = self.view.center;
   [self.view addSubview:indicatorView];
}

Step 2: Configuring properties

There are two interesting properties that you might want to configure with the UIActivityIndicatorView:

• color. Set the color of the indicator view, and it will override the color of the UIActivityIndicatorViewStyle.
• hidesWhenStopped. When the animation is stopped, the indicator will be automatically hidden. It will become visible again if it is restarted.

Step 3: Starting and stopping the indicator view

This example assumes that the UIActivityIndicatorView is in the interface, either because it was linked via an IBOutlet or created programatically.

@interface

@property (nonatomic, strong) UIActivityIndicatorView *indicatorView;

@end

Start the spinning

[self.indicatorView startAnimating];

Stop the spinning

[self.indicatorView stopAnimating];