Snapkit: Unable to use SnapKit inside Swift Playground

[Krisiacik]

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Issue Info

Info | Value |
-------------------------|-------------------------------------|
Platform | ios
Platform Version | 10
SnapKit Version | 3.2.0
Integration Method | cocoapods

Issue Description

1) I created a simple single-view project called QuickViewBuilder (just a name ..doesn't really matter, but it suggests what I want to acchive - it is to build views, view controllers faster..using swift playgrounds..)
2) I promoted the project to workspace using Cocoapods, having SnapKit as a pod.
3) I created a Playground right inside the QuickViewBuilder project.
4) I build the project .(not ran, just built so that the SnapKit dependency is prebuilt)
5) I created a viewController inside the playground using the playground template in Xcode9. But really all there is to it is this line
PlaygroundPage.current.liveView = MyViewController()
so you can actually visualize your playground code on the right pane as if it was an app.
6) I imported SnapKit using "import SnapKit" into playground.
7) For now, no SnapKit code used in the controller, only the import declaration and the playground runs properly.
7) But - as soon as I use a single line of code trying to use snakpit to lay out subviews, i end up with this.
8) Screnshots attached to prove there is no other issue in this whole setup.
9) I can build and render the viewcontroller easily as long as I do not use SnapKit code.
10) If I do, I end up with this error message:

Playground execution failed:

error: Couldn't lookup symbols:
__T07SnapKit17ConstraintViewDSLVN
__T07SnapKit23ConstraintMakerEditableCMa
__T07SnapKit17ConstraintViewDSLV15makeConstraintsyyAA0C5MakerCcF
__T0So6UIViewC7SnapKitE3snpAC17ConstraintViewDSLVfg

Can you tell me why and what is the fix please?

[robertjpayne]

That's pretty weird, I've never tried to use SnapKit in a playground but it sounds like the build system isn't loading the .framework quite right.

What version of Xcode are you using?

[Krisiacik]

1. I created a viewController inside the playground using the playground template in Xcode9.

[Krisiacik]

Any update?

[Krisiacik]

Bumping this up a bit ..Fixing this would be a VERY important step towards a much faster iteration cycle for very big projects...

[Krisiacik]

please ...

[AgranatMarkit]

@Krisiacik
SnapKit (4.0.0)
Try to "pod repo udpate". Adding playground to existing workspace works in my case.

[patchthecode]

@Krisiacik ever resolved this? getting same issue with snapkit 4.0.0

[fespinoza]

Hey @Krisiacik

it depends on which version of CocoaPods you are using, cocoa pods 1.5.0 has issues with playgrounds (https://github.com/CocoaPods/CocoaPods/issues/7689)

and depending the set up of your project, you may need the workarounds mentioned in https://github.com/CocoaPods/CocoaPods/issues/5334

the main thing is: CocoaPods doesn't support playgrounds

But it's possible to use them with this workaround in your podfile:

post_install do |installer|
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
      config.build_settings['CONFIGURATION_BUILD_DIR'] = '$PODS_CONFIGURATION_BUILD_DIR'
    end
  end
end

---

But mainly: for a framework to be able to be imported in playgrounds, you need to make sure the framework is on the first level of your build products folder, which path looks a bit like this:

/Users/random/Library/Developer/Xcode/DerivedData/MyProject-crqqclflsbxmxsbyfbugjehqqxby/Build/Products/Debug-iphonesimulator

---

a bit of a plug, i have some relevant info of working with playgrounds in here https://github.com/fespinoza/Talks/blob/master/2018-05-23-playground-driven-development/Playground%20Driven%20Development%20-%20iOS%20Jam.pdf

---

It's not an issue of SnapKit

[josiprezic]

I had the same issue with playgrounds, so I resolved it in another way. I'm using the combination of Xcode/SwiftUI live previews and UIViewRepresentable protocols to test my UIKit/Snapkit code with live preview enabled. Check it here.

[leavesster]

I had the same issue with playgrounds, so I resolved it in another way. I'm using the combination of Xcode/SwiftUI live previews and UIViewRepresentable protocols to test my UIKit/Snapkit code with live preview enabled. Check it here.

Maybe you can try my pr #669 to check if it works for you