Is it possible to perform UI operations from a background thread?

In iOS, you cannot directly perform user interface operations from a background thread. All UI updates must occur on the main thread, otherwise it can lead to unpredictable behavior or application crashes.

If you need to update the UI from a background thread, you should switch to the main thread, for example, using DispatchQueue.main.async:

DispatchQueue.global().async {
    // Background work
    
    DispatchQueue.main.async {
        // UI update
        self.label.text = "Updated"
    }
}