UIWebView's scrolling after textfield focus

I have UIView and UIWebView on screen. W开发者_StackOverflow中文版hen I click on text field in website, web view content is going up. How could I force UIView to move as well then?

You can subscribe to either the UIKeyboardWillShowNotification or the UIKeyboardDidShowNotification, and move your UIView when you receive the notification. This process is described here:

Text, Web, and Editing Programming Guide for iOS: “Moving Content That Is Located Under the Keyboard”

Maybe this helps: I didn't want the UIWebView to scroll at all, including when focusing on a textfield.

You have to be the delegate of the UIWebView:

_webView.scrollView.delegate = self;

And then add this method

- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    scrollView.contentOffset = CGPointZero;
}

UIWebView has a callback:

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType

This is triggered whenever a new URL request is about to load. From javascript, you could trigger a new request URL on the onfocus event of the tag, with a custom schema like:

window.location = "webViewCallback://somefunction";

Here's a script to put your custom event inside any html page to load.

You'll have to get the whole HTML before loading it to the UIWebView like this:

NSString *html = [NSString stringWithContentsOfURL:[NSURL URLWithString:@"your URL"] encoding:NSUTF8StringEncoding error:nil];

Then insert the following inside the HTML text in a appropriate place:

<script>
    var inputs = document.getElementsByTagName('input');

    for(int i = 0; i < inputs.length; i++)
    {
        if(inputs[i].type = "text")
        {
             inputs[i].onfocus += "javascript:triggerCallback()";
        }
    }

 function triggerCallback()
 {
      window.location = "webViewCallback://somefunction";
 }
</script>

Then, on the callback you should do something like this:

-(BOOL) webView:(UIWebView *)inWeb shouldStartLoadWithRequest:(NSURLRequest *)inRequest navigationType:(UIWebViewNavigationType)inType {
    if ( [[inRequest URL] scheme] == @"webViewCallback" ) {

        //Change the views position 

        return NO;
    }

    return YES;
}

That's it. Hope it helps.

Wow, I had the same problem few days ago, it was really annoying. I figured out that window.yPageOffset is changing, but as far as I know there aren't any events to bind when it changes. But maybe it will help you somehow. ;-)

I think you overwrote scrollViewDidScroll wrong. You need to implement custom class for UIWevView and overwrite scrollViewDidScroll:

 - (void) scrollViewDidScroll:(UIScrollView *)scrollView{
        [super scrollViewDidScroll:scrollView];
        [((id<UIScrollViewDelegate>)self.delegate) scrollViewDidScroll:scrollView];
    }