CODEWITHSUNDEEP
swiftsafari
andromedainiative
andromedainiative

Reputation: 4992

Handling response of javascript injection wkWebKit

Im following this example to retrieve a DOM element in swift: https://www.hackingwithswift.com/example-code/wkwebview/how-to-run-javascript-on-a-wkwebview-with-evaluatejavascript

wkWebView.evaluateJavaScript("document.body.offsetHeight") { (result, error) in
    if error != nil {
        print(result)
    } else {
        print(error ?? "Error")
    }
}

But im getting this error:

 nil
 Error
 App(28447,0x137b3bc40) malloc: *** error for object 0x170b9140: 
 pointer being freed was not allocated
 *** set a breakpoint in malloc_error_break to debug

If I just do a console log and inspect in safari it works fine:

wkWebView.evaluateJavaScript("console.log('Hello World!')")
Hello World!

Upvotes: 1

Views: 83

Answers (1)

Mozahler
Mozahler

Reputation: 5303

Your error is nil. You actually got results.

Either change "!=" to "=="

or change the whole line:

if error != nil {

to

if result != nil {

Upvotes: 1

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