To display a multiline text input with native scrolling behavior in an iOS app, embed an HTML <textarea> inside a WKWebView. This approach gives you a fully scrollable text area without building a custom scroll view.
Steps Overview
- Add the WebKit framework to your project.
- Instantiate and configure a
WKWebView. - Prepare an HTML string containing a styled
<textarea>. - Load the HTML and enable scroling on the web view’s scroll view.
Code Walkthrough
First, import the necessary module:
import WebKit
Next, create the web view and add it to your view hierarchy. Adjust the frame to fit your layout.
let textAreaView = WKWebView(frame: view.bounds)
textAreaView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
view.addSubview(textAreaView)
Build an HTML snippet that includes a full‑size textarea. Use width and height at 100% so it fills the container.
let markup = """
<html>
<body style='margin:0;padding:0;overflow:hidden;'>
<textarea style='width:100%;height:100%;border:none;resize:none;'></textarea>
</body>
</html>
"""
textAreaView.loadHTMLString(markup, baseURL: nil)
Control the scroll behavior through the scrollView property of the web view:
textAreaView.scrollView.isScrollEnabled = true
textAreaView.scrollView.bounces = false // disable rubber-banding if desired
You can customize the textarea’s appearance or add JavaScript callbacks for content changes. This lightweight solution avoids complex UIScrollView composition.