Resizing text in UIWebView - Swift 3

As this is a web view, you can wrap content with "font size" attribute, 

        let content = "<html><body><p><font size=30>" + webContent + "</font></p></body></html>"
        webView.loadHTMLString(content, baseURL: nil)

Here change the size accordingly


This question is answered here:

Resizing UIWebView text

However I converted it in to Swift3 and tested it on Xcode8. Here is the code:

class ViewController: UIViewController {

@IBOutlet weak var webView: UIWebView!

var defaults  = ["textFontSize":12]

override func viewDidLoad() {
    super.viewDidLoad()

    let url = NSURL(string: "https://stackoverflow.com/questions/39638019/resizing-text-in-uiwebview-swift-3")


    let urlRequest = NSURLRequest(url: url! as URL)

    webView.loadRequest(urlRequest as URLRequest)

}

func changeWebViewFontSize(zoomInOrZoomOut: Int, webView: UIWebView)
{
    //1 = decreace
    //2 = increace
    var textFontSizeTemp = defaults["textFontSize"]! as Int


    switch zoomInOrZoomOut
    {
    case 1: //when decrease
        textFontSizeTemp  = textFontSizeTemp - 20
    case 2: //when increase
        textFontSizeTemp = textFontSizeTemp + 20
    default:
        break
    }

    defaults["textFontSize"] = textFontSizeTemp


    let jsString = "document.getElementsByTagName('body')[0].style.fontSize='\(textFontSizeTemp)px'"
    webView.stringByEvaluatingJavaScript(from: jsString)
}

//UIButton Action
@IBAction func zoomOutButton_TouchUpInside(_ sender: AnyObject)
{
    changeWebViewFontSize(zoomInOrZoomOut: 1,webView: webView)
}

@IBAction func zoomInButton_TouchUpInside(sender: AnyObject)
{
    changeWebViewFontSize(zoomInOrZoomOut: 2,webView: webView)
}

Tags:

Ios

Uiwebview

Swift3

Recent Posts