c# - Attaching an event to UIWebView ScrollViewer prevents zooming -

whenever attach event uiwebview's scrollviewer detect scrolling prevent uiwebview zooming in , out. however, scrolling , down still works. viewing pdf in uiwebview.

i've tried these events:

scrolled scrolledanimationended zoomingended didzoom

for example tried:

contractwebview.scrollview.scrolled += (object sender, eventargs e) =>{    debug.writeline("scrolled"); }; 

i have event tried empty event body.

did tried set delegate scrollview instead of using events? this:

public class scrollviewdelegate : uiscrollviewdelegate {     public override void scrolled(uiscrollview scrollview)     {         console.writeline("scrolled");     } }  contractwebview.scrollview.delegate = new scrollviewdelegate(); 

edit: here complete code used test , worked me:

public class ipadviewcontroller1 : uiviewcontroller {     public override void viewdidload()     {         base.viewdidload();          uiwebview webview = new uiwebview(new cgrect(0, 0, uiscreen.mainscreen.bounds.width, uiscreen.mainscreen.bounds.height));         webview.scrollview.delegate = new scrollviewdelegate();         webview.scalespagetofit = true;         view.addsubview(webview);          string urladdress = "http://google.com";         nsurl url = nsurl.fromstring(urladdress);         //url requst object         nsurlrequest requestobj = nsurlrequest.fromurl(url);         webview.loadrequest(requestobj);     } }