Iphone – Handling touches inside UIWebview

iphoneuiwebview

I have created a subclass of UIWebView , and have implemented the
touchesBegan, touchesMoved and touchesEnded methods.

but the webview subclass is not handling the touch events.

Is there any method to handle the touch events inside the UIWebView subclass ???

Best Answer

No subclassing needed, just add a UITapGestureRecognizer :

UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(didTapMethod)];
[tap setNumberOfTapsRequired:1]; // Set your own number here
[tap setDelegate:self]; // Add the <UIGestureRecognizerDelegate> protocol

[self.myWebView addGestureRecognizer:tap];

Add the <UIGestureRecognizerDelegate> protocol in the header file, and add this method:

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    return YES;
}

Related Solutions

Iphone – UIWebView events and hold to select/copy

"The UIWebView class should not be subclassed." - from Apple's UIWebView docs.

It sounds like you're trying to mess with how a person interacts with a web page, which is likely to get you rejected from the app store. (For a lot of possible rejection reasons, check out app rejected.)

If you're not worried about that, here is some advice that might help you achieve your goals:

If you want to control where the user can and can't go via hyperlinks, or just perform some code whenever they click on some links, you can add a hook via the webView:shouldStartLoadWithRequest:navigationType: method of the UIWebViewDelegate protocol. Very handy.
If you want to perform some simple modifications to how the page acts or looks, you can essentially execute your own javascript in the page with a call to stringByEvaluatingJavaScriptFromString:, a method of UIWebView itself. Just pass in your javascript as a string.

And, in case that doesn't give you want you want (in which case you're really going to tick off them app store review guys), then you can probably do what you're already doing, and just propagate all those UITouchs right on through to the UIWebView itself. Something like this, as an example (in the overlapping UIView):

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
  [self doWhatever];
  [underlappingWebView touchesMoved:touches withEvent:event];
}

That way you can have your cake (get the user touch info) and eat it too (have the web page act as it normally does).

Objective-c – Detecting UITableView scrolling

You don't need to intercept the event methods. Check the docs for the UIScrollViewDelegate protocol, and implement the -scrollViewDidScroll: or -scrollViewWillBeginDragging: methods as appropriate to your situation.

Best Answer

Related Solutions

Iphone – UIWebView events and hold to select/copy

Objective-c – Detecting UITableView scrolling

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