Swift print is not showing in Debug Console

Question

I'm trying to do a simple console log (the simplest that can possibly be) and I'm not even able to do that. I'm starting to lose my mind over the simplest thing. Here is my code :


struct ContentView: View {
    var body: some View {
        Text("Hello, world!")
            .onAppear {
                // ApiClient().getParams()
                print("log")
            }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

I'm running a debug preview and nothing is showing in console. I'm already sorry for this question. Is there anything I'm doing wrong or not doing ?

Thank you in advance.

If I understand correctly, you are trying to print log in preview play. In the preview, you can not print anything. It will never work in preview. — Raja Kishan
– Raja Kishan, Commented Jan 19, 2021 at 17:54
You understood right. Then how I can print console logs ? I'm in Debugging live preview — Mathieu Rios
– Mathieu Rios, Commented Jan 20, 2021 at 8:21
I didn't check this. might be useful developer.apple.com/news/?id=8vkqn3ih — Raja Kishan
– Raja Kishan, Commented Jan 20, 2021 at 9:07

mbi · Accepted Answer · 2021-01-19 17:38:00Z

2

I suggest you to read this excellent blog post about logging in Swift.

TL;DR: depending on your target iOS version you should use one of either os_log or Logger (iOS 14 only)

answered Jan 19, 2021 at 17:38

mbi

6396 silver badges15 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Mathieu Rios · Accepted Answer · 2021-01-21 10:04:30Z

1

The answer was that you can't print in live preview mode (even in debugging mode). You have to build and run the simulator to show the console logs.

Sorry for the more-than-novice question.

answered Jan 21, 2021 at 10:04

Mathieu Rios

3945 silver badges19 bronze badges

Collectives™ on Stack Overflow

Swift print is not showing in Debug Console

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related