iOS Tracking URL change in UIWebView and grabbing the data it gives back

Question

I'm pretty new to iOS development, and can't find an answer that helps my problem anywhere. I'm making an app where the user must first login, using a UIWebView. Once the user logs in, they are taken to the app, but in the background the server has passed a unique authentication key for each user. Example The user logs in at the URL www.example.com/login. on a successful login the URL changes to www.example.com/key/jsaeglihndzlgaskn with the end bit being the key I need to get. I have a method which gets the last segment of the URL but it takes the starting URL not the one that changes.

    NSString *absoluteString= _webView.request.URL.absoluteString;
    NSArray* foo = [absoluteString componentsSeparatedByString: @"/"];
    NSUInteger arrsize = [foo count];//count the size of array
    NSString* bar = foo[arrsize-1];//get last element

Any help would be massively appreciated

Edit

This is how my code now looks, but It still doesn't function as I need it to, any help getting this to work would be greatly appreciated.

NSString *urlString = @"https://probablyrational.com/alpha/dashboard/register/?callback=inline";

NSURL *url = [NSURL URLWithString:urlString];
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url];
[_webView loadRequest:urlRequest];


NSString* absoluteString = [url absoluteString];
NSArray* foo = [absoluteString componentsSeparatedByString: @"/"];//explode() .split()
NSUInteger arrsize = [foo count];//count the size of array
NSString* bar = foo[arrsize-1];//get last element
NSLog(@"bar %@", bar);
//bar = "?callback=inline"

if ([foo[arrsize-2] isEqualToString:@"key"]) {
    // user is authenticated
    NSLog(@"bar %@", bar);


- (BOOL)_webView:(UIWebView *)_webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
    NSString *URLString = [[request URL] absoluteString];
    if ([URLString isEqualToString:@"https://probablyrational.com/alpha/key"]) {
        // The user reached step 3!
    }
    return YES;
}

EDIT 2

My code is now running but still not tracking the URL change..

        NSString *urlString = @"https://probablyrational.com/alpha/dashboard/register/?callback=inline";

    NSURL *url = [NSURL URLWithString:urlString];
    NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url];
    [_webView loadRequest:urlRequest];


    NSString* absoluteString = [url absoluteString];
    NSArray* foo = [absoluteString componentsSeparatedByString: @"/"];//explode() .split()
    NSUInteger arrsize = [foo count];//count the size of array
    NSString* bar = foo[arrsize-1];//get last element
    NSLog(@"bar %@", bar);
    //bar = "?callback=inline"

    if ([foo[arrsize-2] isEqualToString:@"key"]) {
        // user is authenticated
        NSLog(@"bar %@", bar);
    }
}

- (BOOL)webView:(UIWebView *)webView didFinishLoading:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
    NSString *absoluteString = [[request URL] query];
    if ([absoluteString isEqualToString:@"https://probablyrational.com/alpha/key"]) {
        // The user reached step 3!
    ( NSLog(@"this is  the code you're looking for"));
    return YES;
    }
    else
    {

        ( NSLog(@"this is  not code you're looking for"));
        return 0;

    }
}

Any clue how I can get this to work would be life saving, i'm stuck at this point

This answer should be what you need - http://stackoverflow.com/questions/2834946/get-notified-about-a-page-change-in-uiwebview — davedavedave, Mar 25 '16 at 08:38
Your code seems legit, for debugging purposes, try to do it step by step, i.e. first NSLog your absoluteString and see what it logs, I am not sure maybe if you change it to NSMutableString it would work. Please let us know how you figured it out — mfaani, Mar 25 '16 at 11:03
I tried using that one and couldn't get it to work, I'll give it another go though, thank you — Nick Jennett, Mar 25 '16 at 11:07
The first parameter of your `webView:shouldStartLoadWithRequest:` has an underscore, assuming you're setting the delegate correctly, which you didn't show us, ¿that could the problem? — calql8edkos, Mar 25 '16 at 21:07
Thanks, I fixed that and that method is now being called, but still isn't functioning properly. I need it to get the URL after the page changes, instead it's firing straight away, any ideas? — Nick Jennett, Mar 25 '16 at 21:18

score 0 · Answer 1 · answered Mar 25 '16 at 08:34

0

you can use [foo lastObject]; to get the last component.

answered Mar 25 '16 at 08:34

Pratik Jamariya

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iOS Tracking URL change in UIWebView and grabbing the data it gives back

1 Answers1