This code example demonstrates how to create UIActivityIndicatorView programmatically in Swift and how to position UIActivityIndicatorView in the centre of the view. In a little more details this code example covers how to:

• Create UIActivityIndicatorView programmatically in Swift
• Position UIActivityIndicatorView in the centre of the main view
• Set UIActivityIndicatorView style to UIActivityIndicatorViewStyle.Gray
• Prevent Activity Indicator from hiding when stopped

 

    
import UIKit

class ViewController: UIViewController {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        //Create Activity Indicator
        let myActivityIndicator = UIActivityIndicatorView(activityIndicatorStyle: UIActivityIndicatorViewStyle.gray)
        
        // Position Activity Indicator in the center of the main view
        myActivityIndicator.center = view.center
        
        // If needed, you can prevent Acivity Indicator from hiding when stopAnimating() is called
        myActivityIndicator.hidesWhenStopped = false
        
        // Start Activity Indicator
        myActivityIndicator.startAnimating()
        
        // Call stopAnimating() when need to stop activity indicator
        //myActivityIndicator.stopAnimating()
        
        
        view.addSubview(myActivityIndicator)
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
    
}

Watch this video tutorial to learn how to create UIActivityIndicatorView using Xcode and Main Storyboard.

Swift UIActivityIndicatorView Example 1. Using storyboard.

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