It can also communicate back to your app using script messages using the WKScriptMessageHandler protocol. What else can you write a user script to do? Well, it can do anything a normal script on the webpage can do–modify document structure, listen to events like onload, load external resources (e.g., images, XMLHTTP requests). This is a brief overview of what it’s like to add a basic user script to a web view at init time. It’s super easy to create too! Let’s start with a simple example of what a WKWebView looks like out of the box.Īll you need to do to get started is create a WKWebView object, add constraints, and pass in a URLRequest to load a webpage: It also includes the same built-in gestures for zooming and navigating backwards and forwards as the ones in Safari. Apple developers ripped out the old JavaScript engine and replaced it with Nitro–the same engine that underlies Safari. It utilizes Core Animation and hardware acceleration so that webpages could scroll at 60fps. WKWebViewįirst announced at WWDC 2014, WKWebView was a game-changer for rendering web content in iOS apps. In this post, I’ll show you examples of how to inject scripts into your webpages and receive data to do things like change the background of the webpage or call native functions directly from JavaScript. It also drastically improved communication with JavaScript natively. The new framework dramatically improved both the performance and flexibility of adding web content into iOS apps, giving developers more control and more power. After iOS 8, however, Apple deprecated UIWebView for WKWebView and introduced the modern WebKit API. Prior to iOS 8, we’d have to use a UIWebView which was clunky, leaked memory, and difficult to debug. We may want to load content from a website that pairs with a native app version, or we may want to let the user open links without having to open another browser. Var age = new Date().As iOS developers, there are times we want to include web content inside our iOS apps. P Age: # //here I need to call calculateAge function This is the issue, I'm using pug/jade templates and i want to call function inside pug template to transform some data This is the main template: I can't solve this for almost four hours, and i can't find any helpful documentation for this kind of problems.
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