how to disable Zoom-Out & Zoom-In

Question

InvaDerZim OP

Created Nov ’18

Replies 9

Boosts 1

Views 21k

Participants

Hi developers is there any chanse to disable Zoom-Out & Zoom-In in WkWebView?

here's all my code so far keep in mind i'm only displaying a web in webView i don't have any other functions 😕

 import UIKit
import WebKit
 
class ViewController: UIViewController, WKNavigationDelegate {
    @IBOutlet var webView: WKWebView!
  
    override func viewDidLoad() {
        super.viewDidLoad()
        displayWebPage()
        let preferences = WKPreferences()
        preferences.javaScriptEnabled = true
        let configuration = WKWebViewConfiguration()
        configuration.preferences = preferences
        let webView = WKWebView(frame: .zero, configuration: configuration)
        // Do any additional setup after loading the view, typically from a nib.
      
    }
    private func displayWebPage() {
      
        let url = URL(string: "hee hee")
        let request = URLRequest(url: url!)
        webView.navigationDelegate = self
        webView.load(request)
        webView.sizeToFit()
    }
  
  
  
  
    func webView(_ webView: WKWebView, didFail navigation: WKNavigation!, withError error: Error) {
        print(error)
    }
}

Boost

Answer 1

Claude31 OP

Nov ’18

Did you try adding in viewDidload

webView.scrollView.minimumZoomScale = 1.0

webView.scrollView.maximumZoomScale = 1.0

0

Answer 2

InvaDerZim OP

Nov ’18

thaks for answer 🙂

webView keeps zooming out and in same as before nothing change 😟

0

Answer 3

Claude31 OP

Nov ’18

I'm not sure, but you could try:

To dispable pinch gesture on the view, set

webView.scrollView.multipleTouchEnabled = false

and / or

add the UIScrollViewDelegate func

func viewForZooming(in scrollView: UIScrollView) -> UIView? {

return nil

}

Should set delegate for webView.scrollView to self.

0

Answer 4

foreverdev2020 OP

Mar ’20

Hi all.. in my case, I need to setup the webview zooming function.. How to enable it? Is it auto set? I already to pinch zooming in emulator, nothing happened 😢

0

Answer 5

Hari_Kiran OP

Mar ’20

You Have to maintain in delegate Method. First You Have to implicate this Delegate, UIScrollViewDelegate. Then only its work

@IBOutlet weak var webView: WKWebView!override func viewDidLoad() {  super.viewDidLoad()  self.webView.scrollView.delegate = self}//MARK: - UIScrollViewDelegatefunc scrollViewWillBeginZooming(_ scrollView: UIScrollView, with view: UIView?) {  scrollView.pinchGestureRecognizer?.isEnabled = false}

I Think It may Useful.

1

Answer 6

vrijma OP

Oct ’20

For anyone still having this issue you can fix it by adding some viewport constraints to the head of the html of the page you have loaded. I do this with some javascript I add to the end of the document:

Code Block  swift    lazy var webView: WKWebView = {        let configuration = WKWebViewConfiguration()        let source: String = "var meta = document.createElement('meta');" +            "meta.name = 'viewport';" +            "meta.content = 'width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no';" +            "var head = document.getElementsByTagName('head')[0];" +            "head.appendChild(meta);"        let script: WKUserScript = WKUserScript(source: source, injectionTime: .atDocumentEnd, forMainFrameOnly: true)        configuration.userContentController.addUserScript(script)        let webView = WKWebView(frame: .zero, configuration: configuration)        webView.navigationDelegate = self        return webView    }()

Alternatively if you are loading in html yourself you can get the same result like this:

Code Block  swift webView.loadHTMLString("<html><head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0 maximum-scale=1.0 user-scalable=no\" charset=\"utf-8\" /></head><body>\(YOUR-HTML-CODE-HERE)</body></html>", baseURL: nil)

Hope this helps!

3

Answer 7

ahmad1980 OP

Apr ’21

Thank you [vrijma] it works

0

	import UIKit
	import WebKit

	class ViewController: UIViewController, WKNavigationDelegate {
	@IBOutlet var webView: WKWebView!

	override func viewDidLoad() {
	super.viewDidLoad()
	displayWebPage()
	let preferences = WKPreferences()
	preferences.javaScriptEnabled = true
	let configuration = WKWebViewConfiguration()
	configuration.preferences = preferences
	let webView = WKWebView(frame: .zero, configuration: configuration)
	// Do any additional setup after loading the view, typically from a nib.

	}
	private func displayWebPage() {

	let url = URL(string: "hee hee")
	let request = URLRequest(url: url!)
	webView.navigationDelegate = self
	webView.load(request)
	webView.sizeToFit()
	}




	func webView(_ webView: WKWebView, didFail navigation: WKNavigation!, withError error: Error) {
	print(error)
	}
	}