Received mail from Apple about the Deprecated API: UIWebView

Hey @brightlink & @dlyt0911,

As far as we’re aware we’ve removed all direct dependencies but there’s still the possibility that some external dependencies are using it. We’ll be making absolute sure that the next version has no instances of UIWebView in it.



Hi @adamjnav , thanks for the quick response. I took the following steps, to no avail:

  1. Update to SDK 35
  2. rm -rf node_modules
  3. npm install

Once i did npm install, UIWebView continued to appear in useragent.js & useragent.js.flow , but it appeared to be commented out in every occurence. Not sure if that’s helpful to you, or anyone else facing this issue.

Do you have a tentative timeline for when we can expect the next version? We are nearing the launch of our app, so a bit skeptical about launching with this error.

I don’t think it will cause any problems? I submitted my app using SDK 35. I received no warnings and it got approved a few hours ago.

Hi @dlyt0911.

Is your app ejected?
What are the dependencies?

By the way, this is not an error. It’s a nebulous warning from Apple that at some unspecified point in the future they will start rejecting submissions of apps using UIWebView.

I also still receive the warning when uploading a new build with SDK 35 and a not ejected project.

I searched for UIWebView in my project and that is the result:

grep -r UIWebView node_modules/*
node_modules/fbjs/lib/UserAgent.js.flow:   * - UIWebView
node_modules/fbjs/lib/UserAgent.js:   * - UIWebView
node_modules/metro/node_modules/fbjs/lib/UserAgent.js.flow:   * - UIWebView
node_modules/metro/node_modules/fbjs/lib/UserAgent.js:   * - UIWebView
node_modules/react-native/node_modules/fbjs/lib/UserAgent.js.flow:   * - UIWebView
node_modules/react-native/node_modules/fbjs/lib/UserAgent.js:   * - UIWebView
node_modules/react-native/Libraries/Components/WebView/     * If true, use WKWebView instead of UIWebView.
node_modules/react-native/Libraries/Components/WebView/WebView.ios.js:     * If true, use WKWebView instead of UIWebView.
node_modules/react-native-web/node_modules/fbjs/lib/UserAgent.js.flow:   * - UIWebView
node_modules/react-native-web/node_modules/fbjs/lib/UserAgent.js:   * - UIWebView
node_modules/ua-parser-js/test/browser-test.json:        "ua"      : "Mozilla/5.0 (iPhone; CPU iPhone OS 10_0_2 like Mac OS X) AppleWebKit/602.1.50 (KHTML, like Gecko) Mobile/14A456 QQ/ V1_IPH_SQ_6.5.3_1_APP_A Pixel/1080 Core/UIWebView NetType/WIFI Mem/26",

So it seems that its just included in comments, so why do I still receive the warning?

I think it would be native code using UIWebView, so it might not appear in the JavaScript in node_modules at all. But it’s rather strange because there are no longer any references to UIWebView in the expo Objective-C code either as far as I can see (as of SDK 35).

It would be interesting to poke around with a decompiler (e.g. IDA Freeware or Hopper etc.) to see where it’s being referenced.

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Thanks for your response @wodin.

I always thought that my project will not have custom native code as long as I do not eject and run any react-native link. So in theory I should not have any native code others with SDK 35 do not have or can that still happen with a dependency?

I’m also not really sure what I need to do in order to decompile and check for usages in native code.

Yes, unless I am missing something you are absolutely right. That’s why this is so confusing. Some people are getting the warning from Apple and others are not and there do not appear to be any references to UIWebView in Expo’s native code.

About decompiling, I’m not 100% sure myself. I have not bought an Apple developer account yet, so I don’t have any IPAs to test this with. I have never used Hopper and have only fiddled with IDA a little (and then not with iOS binaries). In theory you could open the IPA (or maybe extract the binaries from it and then open those) using e.g. IDA and search for UIWebView. That might give you some idea of what’s referencing it. Or it might be a big waste of time.

Hey @adamjnav!

I have a small question: do we have any issue on github related to this problem? I’m asking because I saw the roadmap for SDK 36 ( and I didn’t find there any ticket related to UIWebView problem. I’m not sure if I should wait for the new SDK or I should look for some workarounds?



@adamjnav This is a problem that needs to be solved quickly. Even if you want to leave Apple right away, you can’t because there are too many users. We look forward to your prompt resolution of this problem because it won’t work if you complain to Apple.

I would also like to know if its still on the roadmap to fix that issue once and for all in SDK 36?

Same here after updating from SDK 33 to 35 (I of course deleted node_modules and installed it again).

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My general understanding is that in SDK 35 they removed all of their own references to UIWebView, but some 3rd party depedencies that they used might still be inserting references to it.

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Hey all,

We had believed we removed all instances of UIWebView but can confirm we received the same warning upon testing a new SDK35 project. We’re going to investigate further and see what we can find. As atrick mentioned it may be the result of a third-party library in the SDK and upon a search of the expo/expo repo, no instances aside from text references appear in SDK35’s code. It may also be something pre-built that could be causing this.

We’ll follow up when we know more and let you know. As stated earlier, you won’t get rejected for this but we understand you want this solved so that you can have peace of mind moving forward.


Thanks for continuing to follow up on this. Has anybody successfully submitted a new app (rather than an update to an existing)?

The reason I am asking is that my submission was rejected, even though I did use the SDK35, and the warning email included the phrase “Your delivery was successful”.

My conversation with Apple support ended with:

“”" Oct 7 email from Apple:
Hi Pascal,
Thank you for the email.
I understand the inconvenience you’re currently experiencing. I have already submitted your feedback to the appropriate team.
Regretfully, UIWebView is deprecated and the system is not allowing the build with UIWebView included.

Best regards // p

Just had my app published under SDK 28! I had a warning on delivery, but was accepted. First time on the iOS App Store.

@pwever I was able to get over 5 apps approved from scratch, running SDK 35, and I received the e-mail from Apple about UIWebView being deprecated on all of them. So at least for me, it looks like it’s not holding the apps from being approved.

Thank you very much for the replies!

I will try to submit again, and report back. I might have been assigned to a particular strict agent. Good to know that people have successfully submitted new apps using SDK 35 though.

We upgraded to SDK 35, instead of a warning, our app was rejected for this. Any updates?

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Hey @nuleep, can you share the exact message that Apple gave you for the rejection?