"Integrating JavaScript code into Objective C for iOS development - a step-by-step guide

I am currently working on a project that involves integrating an online chat feature within a webview. Although I have the necessary JavaScript code for the chat functionality, I am unsure of how to implement it. I tested the webview with the Apple website and it worked perfectly, but now I need to figure out how to incorporate the JavaScript code into Objective C. As someone new to this language, I am navigating through uncharted territory. I have already placed the JavaScript code in a designated folder within the resources folder of my app.

javascriptiosobjective-c

Answer №1

Here's a suggestion.

NSString *scriptURL = [[NSBundle mainBundle] pathForResource:@"JavaScript" ofType:@"js"];
NSString *scriptContent = [NSString stringWithContentsOfFile:scriptURL encoding:NSUTF8StringEncoding error:nil];

[wkWebView evaluateJavaScript: scriptContent completionHandler:^(id _Nullable content, NSError * _Nullable error)
 {
     if (error) {
         NSLog(@"An Error Occurred: %@",error);
         return;
     }

     NSLog(@"Loaded Content: %@",content);
 }];

Answer №2

Make sure to check out the official Apple documentation for more detailed information on this topic.

For a great demonstration of using scripts in a webView, take a look at this exemplary example.

Here's a snippet of code that you can implement into your own project:

NSString *filePath;
NSBundle *mainBundle = [NSBundle mainBundle];
filePath = [mainBundle pathForResource:@"first" ofType:@"html"];
NSURL *fileURL = [NSURL fileURLWithPath:filePath];
[webView loadRequest:[NSURLRequest requestWithURL:fileURL]];

NSString * jsFunctionCall = [NSString stringWithFormat:@"myFunction()"];
[webView stringByEvaluatingJavaScriptFromString:jsFunctionCall];

[webView stringByEvaluatingJavaScriptFromString:@"myFunction()"];

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Give an npm package a nickname using a browserify shim

I'm in the process of transitioning from requirejs to browserify. One of the dependencies I have is for masonry. Trying to shim it using the bower version was proving to be a little challenging (more on that can be found here). Instead, I decided t ...

javascriptnpmbowerbrowserifybrowserify-shim

Troubleshooting problem in Xcode arises when managing multiple configurations

I am encountering a perplexing issue with my two different schemes, each pointing to distinct bundle identifiers. com.myapp.appname com.myapp.appname.Debug These bundle identifiers are associated with separate provisioning profiles. Oddly enough, when ...

iosxcodecode-signingprovisioning-profileios-provisioning

Edge Browser does not support PHP Websocket technology

I created a multiplayer card game and incorporated a websocket for functionality. To integrate the websocket in php, I utilized this specific library After deploying it on my Ubuntu server, the program functioned smoothly on Chrome and Firefox (The fronte ...

javascriptphpwebsocketmicrosoft-edgephpwebsocket

Disable button with Checkbox Javascript functionality

In my PHP code, I have an array of users that I pass to the view (in Laravel) and use a foreach loop to display all users in a table. Everything is working fine so far. However, I want to make a "send" button visible when a checkbox is clicked, instead of ...

javascriptphphtmlcheckbox

Positioning Thumbnails with Jquery Cycle Plugin

Initially, my inquiry is quite similar to a question that was previously posted here. However, the difference lies in the fact that I am utilizing WordPress and the nextgen gallery plugin to handle my images. mygallery/image1.jpg mygallery/image2.jpg and ...

javascriptjqueryjquery-pluginsjquery-cyclecycle-plugin

The HTML content retrieved through an ajax service call may appear distorted momentarily until the JavaScript and CSS styles are fully applied

When making a service call using ajax and loading an HTML content on my page, the content includes text, external script calls, and CSS. However, upon loading, the HTML appears distorted for a few seconds before the JS and CSS are applied. Is there a sol ...

javascriptjqueryhtmlcssajax

What is the method for sorting in MongoDB using the objects in the URL query string?

How can I sort a MongoDB collection in a Node.js application based on the query string provided in the URL? The URL looks like this: http://localhost:5000/v1/bid/sort_bid?sort={"_id": -1,"enquiry_no": 1} I am trying to pass an object i ...

javascriptarraysmongodbexpress

Modifying css background in real-time based on the current weather conditions

Is there a way to dynamically change the background image in CSS based on the weather condition? I'm utilizing the wunderground API to retrieve the weather data, which is stored in the weather variable. I am struggling with how to update the backgrou ...

javascripthtmlcssreactjs

The program is producing inaccurate results regarding the number of days displayed on the calendar

I am currently working on a project that involves creating a custom calendar for practice purposes. In this calendar, I need to determine the number of days in a specific month of a specific year. Everything was running smoothly until today, when I encoun ...

ioscalendarnsdate

I am encountering an issue with Angular where the following error message is displayed: "src/app/app.component.html:18:20 - error TS2339: Property 'DepScreen' does not exist on type 'AppComponent'"

This code snippet is from my app.component.html file: <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0" ...

javascripthtmlangularangular8

Error in connecting on IOS due to JSON failure

Discover how to work with JSON in iPhone applications by following this tutorial Any device but may encounter issues when there is no internet connection. If the process of reading JSON fails, sometimes it takes a while for the iPhone to get an IP address ...

iphoneiosjsonipad

"Using Javascript to trigger a postback on the parent page from the child page

When I click a button, I am invoking a JavaScript function from the child ASPX page. function closeChildWindow() { window.opener.document.forms(0).submit(); self.close(); } This code snippet closes the child page and tri ...

javascriptasp.net

Filtering an array in Angular JS based on user input

My current issue revolves around creating a search input field with a search filter in an ng-repeat. I have successfully implemented the search input field, and now I am trying to figure out how to select all the items that match my search criteria using a ...

javascripthtmlangularjsfilterangularjs-filter

JavaScript will continue to process the submit to the server even after validation has been completed

My current challenge involves implementing form validation using JavaScript. The goal is to prevent the form from being sent to the server if any errors are found. I have made sure that my JavaScript function returns false in case of an error, like so: ...

phpjavascripthtmlvalidation

Clicking on the icon image that features a Background Video will trigger the video to play in a popup window originating from the same location

A background video is currently playing on the site. When the play icon is clicked, the video should start playing in a popup. The video should start playing continuously from the exact moment and position where it is clicked. Check out the example here. ...

javascriptjquerycsspopuphtml5-video

When crafting an XPATH expression, I am able to navigate within the #document element. Within this element, I must specify the path to the HTML body of my web page

I need assistance with my HTML page, can someone please help? Here is the XPath code I am using: (//span[text()='Information']//following::div[contains(@class,'edit-area')])[1]/iframe However, when I run my script, it says that there ...

javascripthtmlseleniumxpathiframe

Discover the worth within the outcome obtained from the AJAX request

I have an action that returns a tuple containing a boolean value and a string. How can I retrieve the first boolean value from the result, which could be either true or false? This is the action: public Tuple<bool, string> Check This is the AJAX c ...

javascriptjqueryasp.netasp.net-mvc

Sending information between children components in VueORTransferring data between

So, I have a question regarding the Authentication section of my application. Within my application, I have various components and routes, including register and login. The register functionality is working properly with the API, storing both the usernam ...

javascriptauthenticationvue.jstokenregistration

configure the build parameters for dSYM creation

I've encountered an issue with dSYM and my app. While conducting an experiment, I included the following code: if (currentMenuPage_ == MenuPageAttrsVals) { return ((ValueAndId *) [currentValues_ objectAtIndex:-1]).name; } Unfortunately, the appl ...

ioscrash

Accessing the Node API with a GET request should be the first step taken before proceeding with

In my front-end setup, I have implemented an interceptor that automatically adds an Authorization header if a JWT token exists. There are 2 APIs in play: one for authorization checks and the other for handling data requests (the focus of my work). My goa ...

javascriptnode.jsapiexpressjwt