What's the name of this component?

what kind of component this is

What do you mean precisely ?

• The alert ?
• the heart icon ?
• something else ?

To achieve something similar, you could :

• set alert title to emoji heart in Symbols (choose color)
• set font and size:

        let myFont = UIFont(name: "AppleColorEmoji", size: 128)
        var attributes = [ NSAttributedString.Key: Any ] ()
        attributes[NSAttributedString.Key.font] = myFont
        
        let myTitle = NSMutableAttributedString(string: "\n", attributes: attributes16)
        myTitle.append(NSMutableAttributedString(string: "♥︎", attributes: attributes))

You could also use heart SF symbol and insert in alert:

let heartImage = UIImage(systemName: "heart")
var imageView = UIImageView(frame: CGRect(x: 40, y: 10, width: 80, height: 80))
imageView.image = heartImage

alert.view.addSubview(imageView)

Sorry for didn't make it clear earlier.

I meant the whole UI component which is often used for indicating some feedback to users. e.g when Xcode build fails, it shows with a message "Build failed". Some folks name this "CenterAlert" but no luck with it and it's not even documented in the Apple HIG. Hope that I made myself clear : ).

UI component which is often used for indicating some feedback to users

I hope I understand your question now. That is what alerts are for.

With code such as:

        let myFont = UIFont(name: "AppleColorEmoji", size: 128)
        var attributes = [ NSAttributedString.Key: Any ] ()
        attributes[NSAttributedString.Key.font] = myFont
        
        let myTitle = NSMutableAttributedString(string: "\n", attributes: attributes16)
        myTitle.append(NSMutableAttributedString(string: "♥︎", attributes: attributes))

        let alert = UIAlertController(title: "", message: "Love\nWe'll recommend more for you", preferredStyle: .alert) 
        alert.setValue(myTitle, forKey: "attributedTitle")

If you have no button in alert, you must dismiss it when tapping somewhere outside. https://stackoverflow.com/questions/31857137/how-to-programmatically-dismiss-uialertcontroller-without-any-buttons

That’s often called a HUD or heads-up display.

Here’s one library that implements that sort of thing: https://github.com/jdg/MBProgressHUD