I know this topic is quite popular, but I&#39;m a little iniciate problem in a programming language, the fact is that I still do not understand where I put the code. Well, I&#39;ll tell the whole case:

[![enter image description here][1]][1]

I&#39;m trying to make a modal Swift in a little different from normal: By clicking on a button, the ViewController is displayed (following modal type) on the screen, but with transparent background. Only the blue View with label will be displayed. When this ViewController is presented, it is with transparent background, but as soon as it completes the transition, it will stay with the black background. Already deactivated the opaque option, and tested some options, but nothing this troubleshooting.

Some can help me?

The video is a test in the simulator on the case (https://www.youtube.com/watch?v=wT8Uwmq9yqY).


  [1]: http://i.stack.imgur.com/DGFlN.png

I&#39;m starting with swift, and I&#39;m still pretty lost with how to program in Xcode, I read an answer to a question that has the following code to solve this:

    self.presentingViewController.providesPresentationContextTransitionStyle = YES;
    self.presentingViewController.definesPresentationContext = YES;
    modal.modalPresentationStyle = UIModalPresentationOverCurrentContext;

Where do I put this code?

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Swift Modal View Controller with transparent background