How use stringByEvaluatingJavaScript with params

Question

I'am trying to do this function in Swift 3

self.dict = result as! [String : AnyObject]
self.webView.stringByEvaluatingJavaScript(from: "setFacebookResult(\(self.dict),\(self.userToken))")

I have to pass the token and the result to a global function in javascript but this params dont go correctly to the method. Pls help me!

right there, when i pass int values go correctly but strings go wrong — Lucas
– Lucas, Commented Jan 10, 2017 at 17:14
What you mean by right there, when i pass int values go correctly but strings go wrong, In your code you are passing Dictionary not string. — Nirav D
– Nirav D, Commented Jan 10, 2017 at 17:15
well, i call this function inside graphRequest.start if error == nil — Lucas
– Lucas, Commented Jan 10, 2017 at 17:19

Daniel Klöck · Accepted Answer · 2017-01-10 18:04:49Z

1

You have to format it correctly for javascript.

Note that when using strings, you can't do something like:

let aString = "myTestString"
self.webView.stringByEvaluatingJavaScript(from: "var myString = \(aString)")

instead you have to format it with "":

let aString = "myTestString"
self.webView.stringByEvaluatingJavaScript(from: "var myString = \"\(aString)\"")

answered Jan 10, 2017 at 18:04

Daniel Klöck

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1 Comment

I can resolve the issue converting the result to JSON and use the JSON as param. Ty