Hi, I have started learning Swift recently and due to system specifications, I am learning how to build apps for iOS 12. I have written a code to update UI based on user's click. Note : This function is called in the IBAction Function     //Here i is a global variable     scoreLabel.text = "Score : \(score)"           progressLabel.text = "Question: \(questionNumber+1) / 13"           progressBar.frame.size.width = (CGFloat(view.frame.size.width) / 13) * CGFloat(i)     print("i: \(i)")     i = i + 1       //CGFloat(allQuestion.list.count) * CGFloat(questionNumber + 1)     print(progressBar.frame.size.width)  } But the progress bar frame is not getting updated. I checked and the value is getting updated but when I check on simulator, the progress bar is not updating, rest all are fine. Kindly help me out to solve this issue