CODEWITHSUNDEEP
swiftxcode6swift-playground
TruMan1
TruMan1

Reputation: 36058

Debug breakpoint in Swift Playground?

I'm trying to add a breakpoint in the line # gutter, but no breakpoint is added when I do this in the playground. Is this possible or is there another way to set breakpoints in the playground?

enter image description here

Upvotes: 61

Views: 28122

Answers (6)

KayzMan
KayzMan

Reputation: 11

You can alternatively use Swift Playgrounds app. It has an in-built feature of Step-Through, and it highlights every line in each step as shown below in the attached image:

swift playgrounds step-through-code

Upvotes: 1

Yunus Gedik
Yunus Gedik

Reputation: 162

Instead you can create a swift command line app. Run these lines in command line in order to create a cli app.

mkdir MyCLI
cd MyCLI
swift package init --name MyCLI --type executable

Then run it by:

swift run MyCLI

You can create breakpoints in this app. I copied code samples from documentation.

Upvotes: 0

Adrian
Adrian

Reputation: 16715

If you want to pause execution of a playground to have a peek at what's going on, you can use sleep. The information you can get isn't nearly as granular as what you can get from lldb.

To do this, you'll need to add import Foundation at the top of your playground.

Then, wherever you want to pause execution, you can add this:

sleep(10) // 10 second pause...you can make the number whatever you want

Upvotes: 1

William T. Mallard
William T. Mallard

Reputation: 1660

I'm just getting my feet wet in Swift, but I think the playground idea is to show the changing state as if you ran in debug and recorded all the variable changes. There's no actual need for a breakpoint as you can see the state at any "point in time". I think it'll take me a while to get used to it, having used a debugger for > 30 years, but should be quite useful for small bits of isolated test code, especially while I'm learning the language.

Upvotes: 0

netskink
netskink

Reputation: 4539

Matt, I could not enter code in the comments so here is a better view of using a variable on a line by itself to "debug" it.

for index in 1...5  {
    dosomething(foo);
    foo;
}

Then you can click the eyeball on the right hand side to see a history of foo as it was modified in the loop.

Upvotes: 4

do it better
do it better

Reputation: 4807

There's no debugger so you can't add any breakpoints.

Upvotes: 75

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