Modified 1 year, 6 months ago. WKJavascriptEvaluationResult -> unit Parameters Nov 23, 2021 · I have a wkwebview that loads an html file. When Apple releases the first version of Safari… Mar 22, 2018 · I am using swift 4 for this project. stepWebView. loadFileURL(url, allowingReadAccessTo Apr 29, 2020 · evaluateJavaScript swift nil. webView?. (Injecting the JS here does the job for me -- thanks!) (Injecting the JS here does the job for me -- thanks!). 1". This method will be called when the web view finishes loading the JSON string to HTML file content. 4 WKWebView evaluateJavaScript returns wrong JavaScript Object . 4. If you have any questions just leave a comment below and I’ll respond as soon as I can. getElementById('someElement May 2, 2020 · I have no idea how to run this code in swift to generate a URL without using webView. swift ): I attempting to instantiate an instance of WKWebView and run JavaScript via evaluateJavaScript. scrollRectToVisible(_ rect: CGRect, animated: Bool) A code example would look like: let rect: CGRect = CGRect(x: 0, y: 0, width: 1, height: 1) webView. Oct 9, 2015 · Swift 4. The JavaScript I'm trying to run is "evaluateJavaScript" which I'd expect to return a string such as "Mozilla/5. But the alert() didnot open the alert dialog. evaluateJavascript not working? I have the following code block where I am trying to have a button in a survey pressed in response to a user answer (I shortened it a little). Jul 28, 2020 · How do I create a macOS method that takes a URL parameter and returns HTML using evaluateJavaScript? I want to scrape a URL that uses JavaScript, so neither String(contentsOf: url) nor URLSession. WKWebView evaluateJavaScript returns wrong JavaScript Object. 2 (10E125), Swift 5; Description. console. evaluateJavaScript Fatal error: Unexpectedly found nil while implicitly unwrapping an Optional value Ask Question Asked 1 year, 5 months ago Apr 19, 2017 · I am using a UIWebView to load a webpage that is an article. The method returns an optional string, which means if the code returns a value you'll get it back otherwise you'll get back nil. 0, 4. It works on some websites, but not others. Jun 5, 2014 · Xcode 9. This approach has been working fine and seems to have been broken in iOS 14 (tested beta 3, 4, 5). toString()") returns different results: HTML in first, and . 1 How to run javascript in a webview from Swift. toString()") and. async{} Nov 8, 2022 · WKWebView crashes while trying to evaluate JavaScript on Xcode 14. Jun 30, 2020 · evaluateJavaScript swift nil. 以下の環境で実行しています。 Xcode 12. Approach 1: Using script handlers Nov 5, 2013 · To summarize the answer of @GauntFace and provide an alternative solution without using JSON parser: If your JS function returns just a String and you're wondering about why the string is mangled in Java, it's because it's JSON-escaped. Each key in the dictionary corresponds to the name of an argument in the function Body string, and the value of that key is the value to use during the evaluation of the code. Make sure you have typed the identifier correctly and that it really exists in the document. To get the communication working, i am using the evaluateJavaScript() method to send data Get the Reddit app Scan this QR code to download the app now May 17, 2017 · I'd like to try injecting js script to the WKWebView but it doesn't work. This worked in some cases but not all. scrollRectToVisible(rect, animated: true) I need to get the user agent. Tuy nhiên, việc giao tiếp giữa hai platform không phải lúc nào cũng dễ dàng. URL', => console. – May 28, 2019 · If you’re still using the deprecated UIWebView, you can run custom JavaScript on it using the method stringByEvaluatingJavaScript(from:). In Swift, the evaluateJavaScript method is used to execute JavaScript code within a WKWebView or WKWebViewConfiguration object. Oct 24, 2018 · I am trying to fill in a login page with webView. Four backslashes are needed so that the JS Mar 6, 2019 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand A dictionary of the arguments to pass to the function call. evaluate. dataTask(with: url) seem to work. Mar 1, 2023 · Swift WKwebView. The return type depends on the type you returned from the Using the evaluateJavascript method To evaluate JavaScript code, you can use the InAppWebViewController. logHandler. EvaluateJavaScript : string * WebKit. log output and send to iOS let source = "function captureLog(msg) { window. evaluateJavaScript("changeBackgroundColor('red')", completionHandler: nil) } } When I run the code the web view is presented, but the JavaScript function is not executed. And there is no errors and issues shows. I know about webView. 1, Swift 4; Xcode 10. 0 (iPhone; CPU iPhone OS 13_0 like Mac OS X) AppleWebKit/605. It means there is no element with the given identifier someElement (the method getElementById returns null). Please keep content related to SwiftUI only. Aug 28, 2017 · I have been trying to set a cookie for WKWebView using Swift 3 in order to pass a device token to a server. I would like to use evaluateJavaScript to call a javaScript function: let javascript = “funcName(“<json string>”)” webView?. Hot Network Questions What Christian ideas are found in the New Jul 31, 2018 · evaluateJavaScript swift nil. console. evaluateJavaScript() to execute javascript, I can get string, object and array from javascript. So it is a web but when it's loaded on the App, we should hide the header and footer. stringByEvaluatingJavaScript(from: "navigator. 6k 4 4 gold badges 67 67 silver badges 82 82 bronze badges 3 Don't you think this add extra file in code and might not be preferred when project costing is based on LoC . WKJavascriptEvaluationResult completionHandler); member this. I didn't know about that delegate method. Apr 26, 2017 · I use WKWebview. webkit. evaluateJavaScript but i can't figure out how to evaluate my script. Implement the webView(:didFinish:) method from the WKNavigationDelegate protocol. How to control the sites a WKWebView can visit using WKNavigationDelegate. Basically everything works except evaluating the Javascript: Evaluates a JavaScript string in the context of the specified frame and content world. js file, i already tried some solutions i found on stackoverflow by other users but nothing works can anybody help me with this? i'm losing my mind:(This is what i tried: Oct 13, 2021 · I am using evaluateJavascript with js code document. webby. func evaluateJavaScript( _ javaScriptString: String, completionHandler: ((Any?, Error?) -> Void)? = nil ) In this method, by adding to a DOM element an id, we can inject the script back into the DOM and execute it. Feb 4, 2022 · webview. Code example: extension ViewController: WKNavigationDelegate { func webView(_ webView: WKWebView, didFinish navigation: WKNavigati WKWebView Found 7 articles in the Swift Knowledge Base for this category. 0. Click again to stop watching or visit your profile to manage watched threads and notifications. 3 evaluateJavaScript in swiftui. Something like this: func getCurrentTime() -> CGFloat{ var Apr 25, 2017 · I use wkwebview. configuration. To do so you need to adopt WKScriptMessageHandler by the class you have your WKWebView instance declared in. The code I've been trying to get working in order to set the cookie is as follows: wkWe Feb 2, 2018 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand Aug 4, 2021 · evaluateJavaScript swift nil. 3 Nov 1, 2023 · ios - Swift:使用 evaluateJavascript-我是 Swift 开发的新手,我有一个正在开发的混合应用程序,我已经连接了身份验证。 Swift ; Objective-C ; API changes: Show; 4 of 106 symbols inside -1331393418 . 1 Get HTML by evaluating JavaScript in a WKWebView . evaluateJavascript ("document. evaluateJavascript, but it skip the callback, as evaluateJavascript is done on another thread. """ // Evaluate the event dispatch in the WebView self. Prob because the global variable is probably per frame. While I can use evaluateJavaScript() to execute javascript code to modify the page content. This means that the script event is generated on the web page, but it will be handled in our function: Aug 15, 2020 · How would I set the text size of a SwiftUI WebKit View to a @State variable? I have this code that allows me to use WebViews in SwiftUI. 0. The script is inserted into page which will displayed in WKWebView. userAgent")! Jun 20, 2024 · I am able to call a swift function from javascript, but I am not able to call javascript functions from swift with evaluateJavaScript. If you’ve opted in to email or web notifications, you’ll be notified when there’s activity. How can I fix it? See this image to understand what I mean: Mar 30, 2018 · With one backslash, Swift would see value = "test\test", which means it sees a tab character instead of a backslash (and so does JavaScript). If my understanding is correct, evaluateJavscript also doesn't return anything, ie Void . 33 Mar 11, 2021 · Using evaluateJavaScript() you can run any JavaScript in a WKWebView and read the result in Swift. evaluateJavaScript in swiftui. Apr 11, 2022 · Thanks for your response :) I need to get the result of a promise but evaluateJavascript does not look ok for this. swift This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. getElementById('title Programming Languages Swift Swift WebKit You’re now watching this thread. evaluateJavaScript in swift. Aug 24, 2021 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand Jan 26, 2017 · evaluateJavaScript swift nil. That file also has script tags for multiple scripts that get loaded as modules. Sep 24, 2022 · What difference between methods callAsyncJavaScript and evaluateJavaScript? Using it with same script like: evaluateJavaScript("document. 2 Unable to invoke JavaScript function in local HTML file with webView Sep 24, 2015 · evaluateJavaScript swift nil. Oct 15, 2019 · self. This can be any JavaScript you want, which effectively means you can dig right into a page and pull out any kind of information you want. Nov 12, 2018 · 4 tips for writing documentation – Discoverable, Accessible, Searchable, Handleable (DASH) Designing Developer-Friendly JSON for API responses; 10 criteria to rate oneself in a programming language or framework; Lessons from writing Swift framework that works in Objective-C app; The Pólya-Kipling Method Jul 18, 2020 · OK. log(nativeView. 3. Native code calls back to webView. === BUILD TARGET flutter_inappwebview OF PROJECT Pods WITH CONFIGURATION Debug === The “Swift Language Version” (SWIFT_VERSION) build setting must be set to a supported value for targets which use Swift. To access the title, I need to access the webpage's source code and grab the title from a h1 header that has the same class ID (class="c-page-title") for every article. Still investigating this. 0 app in Swift as a wrapper around a React based web app. I try using webView. With two backslashes, Swift sees one backslash but JavaScript sees value = "test\test" which means it still sees a tab character instead of a backslash. Jan 27, 2022 · webView. Jan 14, 2023 · I'm building an iOS v15. May 7, 2019 · I am trying to set a value from my project in Swift to a website using evaluateJavaScript but when I set the value he set success but he only placeholder not Really Value. Dec 15, 2017 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand Apr 23, 2019 · null is not an object is obvious. evaluateJavaScript("fillDetails('\(self. I have the prompt working, and this is my callback once they opt into the notifications (Inside AppDelegate. The string did not match the expected pattern in evaluateJavaScript swift nil. jsonString will release an article where I will show you how to load a webpage developed React and how React methods can callback Swift. outerHTML. messageHandlers. – JDev. By default a WKWebView can navigate to any links the user selects, but it’s common to want to restrict that. Hot Network Questions Feb 20, 2019 · evaluateJavaScript swift nil. For iOS programming related content, visit r/iOSProgramming Dec 19, 2019 · evaluateJavaScript swift nil. 33 WKWebview - Complex communication between Javascript & native code. let userAgent = UIWebView(). Oct 14, 2020 · SwiftではWkWebViewクラスのevaluateJavaScriptを使うことで任意のJavaScriptを実行することができます。 ※偶然なのか意図的なのか不明ですが関数名は May 27, 2019 · I'm trying to call a native WKWebView method, but nativescript keeps saying that the evaluateJavaScript function is undefined. evaluateJavaScript(javascript, completionHandler: nil) I obviously cannot do that because of the two levels of quotes on the javascript To navigate the symbols, press Up Arrow, Down Arrow, Left Arrow or Right Arrow Apr 29, 2018 · I want to know if there is a github project that is an alternative to wkwebview's evaluateJavaScript:completionHandler. toString()") Thank you very much. I made a vastly simplified example to try to find a solution, Dec 17, 2021 · I am currently using the WKWebView to evaluate Javascript in my Swift code. That is, of course, if you're using WKWebView to display web content. callAsyncJavaScript("document. evaluateJavaScript(request ID). How can I wait for JS callback? AppWebView. evaluateJavaScript('document. javascript swift Jan 7, 2016 · I have a CustomWebViewRenderer for Android that contains an event to process javascript using EvaluateJavascript, and I have a Callback object to catch the result of the javascript, but I need to s Aug 4, 2022 · @tomerpacific I did this in android webview app in similar way and it worked. 1. Jan 24, 2017 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand Oct 22, 2018 · I have a migration issue from UIViewView to WKWebView, detecting the Scroll View reached bottom when using WKWebView. I fetch the CSS URL from the config and To navigate the symbols, press Up Arrow, Down Arrow, Left Arrow or Right Arrow Apr 3, 2023 · Memory leaks (Malloc 32 Bytes x 4) when calling WKWebView. I am trying to run some of the functions inside those modules using evaluateJavaScript, but I cannot either import the respective module or call any of my objects or functions inside the modules. For SwiftUI discussion, questions and showcasing SwiftUI is a UI development framework by Apple that lets you declare interfaces in an intuitive manner. scrollView. atDocumentEnd, forMainFrameOnly: false) webView. Evaluate Javascript code in swift without a Apr 27, 2023 · My iOS developer shows me a POC using evaluateJavaScript ref link. Cần phải có cầu nối giữa Swift và Đôi khi ta có thể thấy web component hoặc webView được tích hợp vào trong ứng dụng iOS. 2 Call evaluateJavascript from a SwiftUI button. May 3, 2018 · evaluateJavaScript swift nil. My problem is that stringByEvaluatingJavaScript is synchronous and returns a String while the replacement for the deprecated method is evaluateJavaScript for the class WKWebView is asynchronous. You have answered the question so going to mark it correct. querySelectorAll('. I also checked in the swift documentation , we can inject javascript code in swift. Feb 5, 2018 · Swift: using evaluateJavascript. loading- Is synchronous communication between JavaScript and Swift/Obj-C native code possible using the WKWebView? These are the approaches I have tried and have failed. This script will return the page URL (but you can write another JavaScript code). Detect button click (by class name) in WKWebView with JavaScript. – Aug 7, 2022 · I have a very simple activity where I will later try to extract some information from a web page that is shown in a webView. body. Dec 25, 2023 · A Flutter plugin that allows you to add an inline webview, to use an headless webview, and to open an in-app browser window. Here is an example of what isn't working. 1 Unexpectedly found nil, but vars are not nil . Call a swift function from java script that returns a value using wk webview. innerHTML") { (value, error) in if let valueName Apr 2, 2017 · 17. querySelector(\"pre\"). This setting can be set in the build settings editor. Actually I did not succeed to get any result with it. How should I try calling that function? Here's the code I'm trying to run . I am trying to use the EvaluateJavascript() function to run javascript on a webpage running in a WKWebView. The values are definitely set. JSGlobalContextRef. 4 WKWebView evaluateJavaScript returns wrong JavaScript Object May 19, 2019 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand Jun 17, 2019 · Key Components: WKWebView — allows web content to be loaded via a url. The weird part is I am able to change the DOM with evaluateJavaScript, for instance does this work: self. evaluateJavaScript("document. Call evaluateJavascript from a SwiftUI button. 2/5): // inject JS to capture console. The javascript won't execute. Load 7 more related questions (WKWebView, content size, evaluateJavaScript ) I'm going to address the question itself (calling evaluateJavascript from a SwiftUI button) and not necessarily the javascript itself (your toggleScrolling function), which I haven't tested. var configuration: WKWebViewConfiguration. 2, 5. Feb 2, 2020 · In this post I will show how to use Swift and JavaScript to communicate between the app and the web-page that is loaded on the WKWebView. I know Apple uses Mar 9, 2018 · evaluateJavaScript swift nil. Related questions. Dec 29, 2023 · In Swift, I would like to make an extension on Set that takes two arrays, and the function needs to add the elements from one array and remove elements found in another array to the called upon Set. May 3, 2019 · I'm trying to write a function that runs an evaluateJavaScript, waits for the result and returns it in Swift as a func return param. 15 (KHTML, like Gecko) Version/13. evaluateJavaScript swift nil. It is going to concentrate on local/embedded web pages. Load 7 more related questions Show fewer related questions Feb 2, 2017 · It's still there, just Swift 4-ized / modularized; try this signature: func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!). WKScriptMessage — object created when a postMessage () is received. To navigate the symbols, press Up Arrow Jun 19, 2016 · I'm trying to prompt the user to opt into push notifications, and then if they accept, send their device token to the browser (via evaluateJavaScript) so that I can save it into the database. This code uses the callAsyncJavaScript to evaluate Javascript. May 11, 2016 · This worked for me (Swift 4. postMessage(msg); } window. 4 WKWebView evaluateJavaScript returns wrong JavaScript Object For information about concurrency and asynchronous code in Swift, see Calling Objective-C APIs Asynchronously. Feb 14, 2018 · I need to return a value in Swift by executing JavaScript, but I am having trouble I have searched everywhere, but I can't find anything that works. evaluateJavaScript(CalculateTax('\(amount)');) to execute a java script function to calculate tax and display tax on myhtmlpage. Sep 26, 2019 · evaluateJavaScript swift nil. 4 WKWebView evaluateJavaScript returns wrong JavaScript Object. You’re now watching this thread. Sep 5, 2016 · My problem is that I would also need a function that return a response from the Javascript. . WKUserContentController — manages javascript posts and Jan 30, 2017 · I am trying to wait for javascript callback, however, the swift callback is being called before the javascript callback. The string did not match the expected pattern in evaluateJavaScript. evaluateJavaScript("$('. For Swift programming related content, visit r/Swift. Nov 2, 2020 · 前提条件. But my real goal is to pass a variable to webview from Swift and run a script on the webview. WKWebView是苹果在iOS 8中引入的新组件,目的是给出一个新的高性能的WebView解决方案,摆脱过去 UIWebView的老、旧、笨重,特别是内存占用量巨大的问题,它使用Nitro JavaScript引擎,这意味着所有第三方浏览器运行JavaScript将会跟safari一样快。 Jan 19, 2022 · I am using SwiftUI, so I have a wrapper around the Webview, like this: import SwiftUI import WebKit struct WebView: UIViewRepresentable { var url: String let webView = WKWebView() To navigate the symbols, press Up Arrow, Down Arrow, Left Arrow or Right Arrow Jan 9, 2020 · evaluateJavaScript の場合は実行完了後の処理をコールバックで受け取るため、後続の処理をそのまま実行してしまいます。 userAgentに結果を代入する前にNSLogを実行するため、結果は空となってしまいます。 Jan 10, 2022 · In my SwiftUI App, i used a WKWebView to update some html tags from native side, using SwiftUI TextFields. My code takes parameters from the user and then injects those parameters into the Javascript string that is evaluated by callAsyncJavaScript. Jan 11, 2022 · evaluateJavaScript swift nil. name')[0]. Once I press a button, I create a struct with the url, title, and image. It accepts a String as source code to be evaluated by the WebView and an optional Content World and returns the result of the evaluation as a dynamictype. 7. 2: func evaluateJavaScriptForData(dictionaryData: [String: AnyObject]) { // Convert swift dictionary into encoded json let serializedData = try! Mar 19, 2021 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand Feb 9, 2020 · How to get evaluateJavaScript to work when a message is received from webview? evaluateJavaScript swift nil. Prior to WKWebView I used the UIScrollViewDelegate detecting wether the User ha Sep 21, 2017 · I have a logic to pull necessary date to calculate "amount" after doing the calculation, I use webView?. For now I simplified it to a script which just changes the text color and I am trying to fill in a login page with webView. display = 'none'", ); I have already tried everything in order to perform my own JS on the webview page, JS is not performed in any way. evaluateJavaScript() to ensure that the global variables are not somehow reset. Dec 22, 2023 · 本文深入探讨Swift与H5方法互调的原理和实现方式,涵盖UIWebView和WKWebView两种方案,并提供详细的代码示例和最佳实践建议,帮助开发者轻松实现Swift和H5之间的无缝交互。阅读本文,您将全面掌握Swift与H5方法互调的技巧,为您的应用开发注入更多活力。# May 31, 2023 · This article explores inter-process communication between the WKWebView and the native side. main. ios. Ask Question Asked 4 years ago. documentElement. After evaluating the script, this method executes the completion handler block with either the result of the script evaluation or an error. WKWebView evaluateJavaScript returns wrong JavaScript May 4, 2018 · How to get a string of text like this: Simple Text Example from macOS' Safari page via Swift 4? @IBOutlet weak var label: NSTextField! @IBOutlet weak var webView: WKWebView! override func Jul 4, 2021 · 以上代码和之前evaluateJavaScript的方式效果一样; evaluateJavaScript和addUserScript的区别. 1 . 调用时机不同: evaluateJavaScript可以在任何需要的时候调用(比如点击哪个原生的按钮);而addUserScript注入JS的方式只有2种时机 Executes the specified JavaScript code. 2 Swift WKWebView and Javascript Interaction. 2 Call evaluateJavascript from a SwiftUI button Aug 15, 2017 · I'm trying to take a piece of string from HTML using evaluateJavaScript in Xcode with Swift 3 and the piece of text is called value inside the completion handler, so I did like this: var userName = String() func takeData() { webView. sucess(nil) in second Aug 28, 2019 · evaluateJavaScript. 4 WKWebView evaluateJavaScript returns wrong JavaScript Object Apr 29, 2022 · evaluateJavaScript swift nil. style. Wait for JS Callback After evaluateJavaScript. evaluateJavaScript("document. evaluateJavascript(jsCode, new ValueCallback<String>() { @Override public void onReceiveValue(String value) { } }); Once the JavaScript side receives jsCode , how does it execute jsCode and return the result back to the callback of evaluateJavascript ? Apr 25, 2017 · evaluateJavaScript swift nil. The return type depends on the type you returned from the Hopefully that demystifies completion handlers and code blocks in Swift for you. If I create a new function and try running it from evaluateJavaScript that Jun 30, 2019 · evaluateJavaScript swift nil. To execute the JavaScript, I am using. Here's an example that pulls out the current page's title: May 28, 2019 · TAKE YOUR SKILLS TO THE NEXT LEVEL If you like Hacking with Swift, you'll love Hacking with Swift+ – it's my premium service where you can learn advanced Swift and SwiftUI, functional programming, algorithms, and more. evaluateJavaScript passing a completion handler. log('in foobar');}" completionHandler:^(NSObject* res,NSError* err) { }]; Nov 22, 2019 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand In our app we are dynamically creating a form with input fields and relying on evaluateJavaScript() function to submit the form and load the url in the decision handler. To review, open the file in an editor that reveals hidden Unicode characters. I am trying a simple alert function to start to make sure the javascript is executed. getElementsByTagName ('main') [0] . Supported values are: 3. import SwiftUI import WebKit struct WebView : UIViewRepresentable { var url : URL; func makeUIView(context: Context) -> WKWebView { return WKWebView(); } func updateUIView(_ uiView: UIViewType, context: Context) { uiView. public void EvaluateJavaScript (string javascript, WebKit. Hot Network Questions Clock that is twice as fast Using the evaluateJavascript method To evaluate JavaScript code, you can use the InAppWebViewController. com Aug 20, 2015 · Here's an update of the Swift code from Ashok's accepted answer, compatible with Swift 3. 2. Jul 1, 2016 · WKWebView的基本介绍和使用 WKWebView的几个代理方法. log = captureLog;" let script = WKUserScript(source: source, injectionTime: . evaluateJavaScript(script I am having a problem using the evaluateJavaScript function in WkWebView. This function is part of the WKWebView's UIScrollView and scrolls to a given rectangle. Hot Network Questions Suitable tool bag for Swift . 1. nested stringByEvaluatingJavaScript in UIWebview migrate to WKWebview. backgroundColor = 'orange'") See full list on hackingwithswift. 0; iPhoneシミュレータ: iOS14系; Qiita: iOS WKWebView ネイティブとローカルJavascript連携 を参考に、それに更に調査を加えました。 Apr 18, 2018 · I have set a breakpoint right before webView. evaluateJavaScript() funciton to execute javascript in the wkwebview of swift3. The websites that it doesn't work on, I am able to type JavaScript in the chrome console with positive results, therefore I assume the JS is correct. 0 Mobile/15E148 Safari/604. 1, using Swift, tested on iOS but same behaviour should be on macOS. [_webview evaluateJavaScript:@"function foobar() {console. The reason for this is because for my server, I've noticed that I can't call evaluateJavaScript from a background thread, to which Xcode tells me it can't and I have to wrap it inside a DispatchQueue. But why is evaluateJavaScript() not injecting the variables in the HTML the second time? Do I have to empty / clear the WKWebView beforehand? The simplest solution I can suggest is just posting a message to your webView. May 21, 2020 · Swift: using evaluateJavascript. evaluateJavascript method. If you’d like more Swift tutorials on topics like this one, sign up below to get them sent directly to your inbox. innerText;") Swift ; Objective-C ; API changes: None; 4 of 15 symbols inside -1468564808 containing 11 symbols. Hot Network Questions Why do only 2 USB cameras work while 4 USB Mar 25, 2015 · I'm trying to solve the same problem without any 3rd party libraries. This of course is an opportunity for js injection attacks that could cause unwanted js to run. 1 Unexpectedly found 'nil' when running app on Swift. using callAsyncJavaScript in WKWebView. I used to get it using UIWebView but it's deprecated now. Nov 6, 2014 · evaluateJavaScript waits for main thread released, Hey @Nicolas, I'm getting new crashing errors with this code (introduced with Swift 5 I believe). display = 'none' but it fails _webController. html. Viewed 1k times 0 Please tell me, I'm trying to take input value from Mar 5, 2020 · evaluateJavaScript swift nil. I searched several Stack Overflow questions and none of them work for this. How to run javascript in a webview from Swift. To navigate the symbols, press Up Arrow Apparently Apple changed the semantics of evaluateJavaScript: depending on when the following code has been called the new function does not appear in the JS namespace if it is called too early. Load 7 more related What will happen to existing apps who use evaluateJavascript (with custom property added to window object) and upgrade to iOS 15? Swift Playgrounds; TestFlight Feb 26, 2018 · Swift: using evaluateJavascript. Here's an example to get you started: webView. loadFileURL(url, allowingReadAccessTo: url) } func updateUIView(_ uiView: WKWebView, context: Context) { uiView. therefore I was trying the same thing in swift webview. I tried with saving callback in a global dictionary in JS with a key request ID. I think this is a great opportunity to use Combine (which means you have to make sure to import Combine at the top of your file) to pass messages between Oct 22, 2019 · evaluateJavaScript swift nil. userContentController. addUserScript(script Jul 18, 2023 · Step 4: Generating PDF. In order to do so, I am going to use an example to demonstrate how to achieve communication in both directions; both from the web page to the app and from the app to the web-page. shared. 0 The string did not match the expected pattern in evaluateJavaScript. log('Hello, world'))); Evaluates a JavaScript string in the context of the specified frame and content world. lnhla gwy hzhnqb xatqyl rkvg ksimj fzbjeow yqazlo nry qfrukc