CODEWITHSUNDEEP
iosswiftios10wkwebviewswift2
Chris Brandsma
Chris Brandsma

Reputation: 11736

WKWebView error calling any javascript in iOS 10 while debugging

Fun error that ONLY happens in iOS 10, when debugging on a physical device. It does not happen in the simulator, or when running on the physical device (while not debugging). It also does not happen on an iOS 9 device in any situation...only iOS 10 while debugging and after any javascript call has been executed.

I have a hybrid web app, written in Swift 2.3, after the xwebview loads I call various javascript methods...actually, any in this case. Anyway, after the javascript method has finished I get a malloc error saying I'm trying to free a pointer.

malloc: *** error for object 0x1740b5060: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug

So I set the break point...and it never breaks on the breakpoint, it just keeps telling me to set a breakpoint.

If I remove all of my javascript calls, the error never happens. I've tried enabling them one by one, it doesn't matter, they all break after the callback returns.

I've been after this for about 2 weeks, I'm out of extra hair to pull out. At this point I'd love to hear if someone else is seeing the same thing.

Upvotes: 1

Views: 1119

Answers (1)

Silicium
Silicium

Reputation: 467

It looks like its a safari bug and therefore only appears when you are debugging your webview with safari. In Safari under Develop->Your_Device_Name uncheck "Automatically Show Web Inspector for JSContexts". This should resolve your issue.

Upvotes: 5

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