Javascript return a string to objective c

Question

i got a webview and i would like to capture an input from a webview HTML form. i have tried but i cant can some one help me please

this is my webview code

        // Init Web View
    UIWebView *webView;
    webView = [[UIWebView alloc] initWithFrame:boundsRect];
    webView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
    webView.scalesPageToFit = YES;
    webView.contentMode = UIViewContentModeCenter;
    webView.multipleTouchEnabled = NO;
    webView.userInteractionEnabled = YES;
    [webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:url]]];
    [self addSubview:webView];
    [webView release];
    return self;

To get value from webView, i used below code.

NSString* value = [webView stringByEvaluatingJavaScriptFromString:@"document.getElementById('text').value"]‌; 
NSLog(@"got: %@",value);

i have tried with this : NSString* value = [webView stringByEvaluatingJavaScriptFromString:@"document.getElementById('text').value"]; NSLog(@"got: %@",value); — Danilo Costa, Jan 13 '14 at 14:37
And the problem is ? `-stringByEvaluatingJavaScriptFromString:` return nil ? — Emmanuel, Jan 13 '14 at 15:14
it return an empty string `@""` or nil ?? not 'anything' ... — Emmanuel, Jan 13 '14 at 15:20
is there a way to only execute that con afeter an HTML buton is pressed? — Danilo Costa, Jan 13 '14 at 15:24
So the script success, simply that your input `value` property is empty. — Emmanuel, Jan 13 '14 at 15:24
To execute it after an HTML button is pressed see : http://stackoverflow.com/questions/6869199/javascript-event-handler-in-uiwebview — Emmanuel, Jan 13 '14 at 15:30
i tryed and i couldn't do it is it that complicated to send a value from javascript to xcode? — Danilo Costa, Jan 13 '14 at 16:20

score 0 · Answer 1 · answered Jan 13 '14 at 14:37

0

You could look into how phonegap http://phonegap.com/ solves this.

answered Jan 13 '14 at 14:37

Harper04

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Javascript return a string to objective c

1 Answers1