Modifying autolayout from background thread

[mikkelam]

Hi, I'm getting this error when using the google login feature

This application is modifying the autolayout engine from a background thread, which can lead to engine corruption and weird crashes. This will cause an exception in a future release.

I believe it is a result of using datatask in the google loginhandler.

Please checkout this stackoverflow post , I believe it could be fixed by wrapping the callback call with:

if error == nil {
    dispatch_async(dispatch_get_main_queue(), {
        self.handleRequest(...)I
    })
}

[edjiang]

Hey @mikkelam! Which specific line are you talking about?

The Simplicity callback is intentionally on the background thread, since most of what people would want to do is to make other network calls, etc. So if you'd like to perform UI operations on the Simplicity callback, I would recommend that you wrap your own callback with a Dispatch call. If you do that, does that solve your error?

[mikkelam]

Are you not getting this error when trying to use google login? I'm getting it on ios 9.3.1. Simplicity is modifying autolayout engine by messing with the safariview is what I think is the issue.

This is the only code I am using

let google = Google()
google.scopes = ["email"]
google.login {
    (result, error) in
        if let accessToken = result{
            //Dostuff
        }else{
            //Some error
    }
    }
}

[edjiang]

Nope! Not getting this at all, and I just specifically tried Google w/ iOS 9.3.1. If you'd like I can screenshare sometime later today or tomorrow and try to help you get it figured out. Have you tried wrapping your // Do stuff with Dispatch? Do errors still occur?

[mikkelam]

@edjiang I wrapped my code with Dispatch and it fixed the issues :) Thanks mate, great project 👍

[edjiang]

No problem; glad it's helpful to you!