How to convert navigationcontroller's back button into browser's back button in iPhone?

I am showing a some text and images in UIwebview in navigation based application. It also contains some link to the source of the data i.e the 开发者_C百科websites. It is showing it in perfect manner. But when user click on the back button it pop the previous viewcontroller and goes to it. But, What I want when user click on the link the back button must be converted into browser's back button and act like it.

Any suggestions/sample code or tutorial for it?

You can replace the navigation bar's back button with a browser back button whenever the UIWebView has the option to go back by doing something like this:

- (void)updateBackButton {
    if ([self.webView canGoBack]) {
        if (!self.navigationItem.leftBarButtonItem) {
            [self.navigationItem setHidesBackButton:YES animated:YES];
            UIBarButtonItem *backItem = [[[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStylePlain target:self action:@selector(backWasClicked:)] autorelease];
            [self.navigationItem setLeftBarButtonItem:backItem animated:YES];
        }
    }
    else {
        [self.navigationItem setLeftBarButtonItem:nil animated:YES];
        [self.navigationItem setHidesBackButton:NO animated:YES];
    }
}

- (void)webViewDidStartLoad:(UIWebView *)webView {
    [self updateBackButton];
}

- (void)webViewDidFinishLoad:(UIWebView *)webView {
    [self updateBackButton];
}

- (void)backWasClicked:(id)sender {
    if ([self.webView canGoBack]) {
        [self.webView goBack];
    }
}

See First thing that you have to do is, that you have to hide the default back button, as follows below

self.navigationItem.hidesBackButton = YES;

After this you have to add a custom back button on the navigationbar as below:

UIButton *m_BackBtn = [UIButton buttonWithType:UIButtonTypeCustom];

m_BackBtn.frame = CGRectMake(4.0, 5.0+0.0, 100, 30);

[m_BackBtn setTitle:@"Back" forState:UIControlStateNormal];

[m_BackBtn addTarget:selfaction:@selector(BackButtonAction)forControlEvents:UIControlEventTouchUpInside];

[m_BackBtn retain];

[self.navigationController.navigationBar addSubview:m_BackBtn];

*And in the BackButtonAction Function *

-(void)BackButtonAction
{

   [yourwebView goBack];

// Do your stuff as you required

}

Take a UIBarbuttonItem from XIB at the place of back button and you can write following in its IBAction method Suppose your UIWebview object is

UIWebView *web;

-(IBAction)goBack
{
       [web goBack];
}

goBack is inbuilt method of UIWebView

I like @cduhn's approach above for it's simplicity, but it has the downside of losing the "<" on the Back button. See this answer if you want to keep the "real" back button (with it's "<" icon), but change the button's behavior:

https://stackoverflow.com/a/19132881/132542

For the web view history case here, this is the code I used in my delegate method:

-(BOOL) navigationShouldPopOnBackButton {
    if (webView.canGoBack) {
        // Then just go back in the web view
        [webView goBack];
        // return NO to keep the current view controller loaded
        return NO;
    }
    else {
        // no web history, so pop the view
        return YES;
    }
}

This is a bit tricky solution, may not be suggested. But this way you can maintain the back navigation animation on navigation bar.

var urlRequest: NSURLRequest?
////////
func webView(webView: UIWebView, shouldStartLoadWithRequest request: NSURLRequest, navigationType: UIWebViewNavigationType) -> Bool {
    if navigationType == .LinkClicked {
        //AViewController creates and pushes itself to the navigationController
        let pushViewController = self.storyboard?.instantiateViewControllerWithIdentifier("AViewController") as! AViewController
        pushViewController.urlRequest = request
        self.navigationController?.pushViewController(pushViewController, animated: true)
        return false
    } else { //is initial request from push
        return true
    }
}