Call action from UIWebView with JavaScript

Question

I am trying to build a simple app that uploads images to my site. I am using this tutorial: http://www.youtube.com/watch?v=aQXaJO36I7Y

What I want to do instead of using a button from the app's interface I wan to use a button within a website in a webview. So I want a button to call the opening of the photo album to select a image to upload.

Basically I need a way for a javascript function to call a action in the app itself.

How can I do this?

rckoenes · Accepted Answer · 2011-06-21 08:53:24Z

4

You could just use a custom link, which you can then detect in the UIWebViewDelegate method.

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

    if (navigationType == UIWebViewNavigationTypeLinkClicked) {
        NSString *rawURL = [[request URL] absoluteString];
        if([rawURL isEqualToString:@"callImageLib://"]) {
                [self methodeForImageLib];
        }     
        return NO;
    }

    return YES;
}

answered Jun 21, 2011 at 8:53

rckoenes

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4 Comments

John Over a year ago

I can't seem to get shouldStartLoadWithRequest to trigger, I add - NSLog( @"Ytest" ); to the beginning to see if it would work, but it doesn't seem to intercept to change of location. I placed the code in AppDelegate.m with @synthesize webView; at the top.

rckoenes Over a year ago

Dot not place the code in the appdelegate but in the viewController the displays the webview. Then set the self.webView.delegate = self; in the viewDidLoad of the viewController.

John Over a year ago

My appdelegate's window is displaying the webview?

rckoenes Over a year ago

Then add a ViewController, this is a better way of spilliting op your code. Or se the delegate of the webiview to your appDelegate if you realy want to go that way. So where you create the webView use:self.webView.delegate = self

Naveen Murthy · Accepted Answer · 2011-06-21 08:56:08Z

0

If i understand it correctly you need to communicate iPHone Web application to call native iPhone application and visa versa. please check the following links.

http://blog.techno-barje.fr/post/2010/10/06/UIWebView-secrets-part3-How-to-properly-call-ObjectiveC-from-Javascript

http://iphoneincubator.com/blog/windows-views/how-to-inject-javascript-functions-into-a-uiwebview

hope these 2 link help to solve your issue.

answered Jun 21, 2011 at 8:56

Naveen Murthy

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1 Comment

Cullen SUN Over a year ago

Demo, here is another blob on the topic Javascript run in UIWebview, please refer to :creiapp.blogspot.hk/2013/04/uiwebview-javascript.html

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