Html form in UIwebview send back to ios? - objective-c

Question

i am trying to pass information between an HTML form and ios i tryed javascrip but it isn't working?
// 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];
NSString *testArrayString = [webView stringByEvaluatingJavaScriptFromString:#"testString"];
NSArray *testArray = [testArrayString componentsSeparatedByString:#"#"];
NSLog(#"%#", testArray);
[webView release];
return self;
any ideas?
----EDIT----
Ok guys if u only want to make data from a form pass to a ios app you only do this to your webview
[webView setDelegate:self];
Then you can implement this methods in your program marks
like:
-(void)webViewDidFinishLoad:(UIWebView *) webView {
//implement code to do here
}
if you want to capture a for just do a webview shouldStartWithRequest like this:
-(BOOL)webView:(UIwebView *) webView shouStartWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigation{
//implement code to do afeter the user click the form don't forget to return YES or NO because it is a BOOL
}
that is how i solve it any question please do tell me i try my best to help

Answer 1

To pass data from UIWebView and back to your Objective-C runtime, you need to implement UIWebViewDelegates webView:shouldStartLoadingWithRequest: and pass your form-data as parameters in the URL. If you craft all your URL's with a scheme like f.ex. my-app://?parameter1=value1&parameter2=value2, you can easily filter out the URLs the web view should not load, and return NO.
EDIT:
Added example-code.
- (void)initWebView
{
UIWebView *webView;
webView = [[UIWebView alloc] initWithFrame:boundsRect];
webView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
webView.scalesPageToFit = YES;
webView.contentMode = UIViewContentModeCenter;
webView.multipleTouchEnabled = NO;
webView.userInteractionEnabled = YES;
webView.delegate = self;
}
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
NSURL *url = request.URL;
if ([url.scheme isEqualToString:#"http://"]) {
return YES;
}
else if ([url.scheme isEqualToString:#"my-app://"]){
// Process data from form
return NO;
}
return YES;
}
EDIT2: You are releasing the web view in your initialisation-code. This prevents the delegate-method from being called when you are loading the form-url
EDIT3: See this question for more code-examples: Invoke method in objective c code from HTML code using UIWebView