Question

I am facing a very silly problem with my code for buttons in the toolbar. I am using the following code and I already have the action handler functions in the code, but whenever I am clicking on the buttons, I am getting the error: ” – [UIWebView function_name]: unrecognized selector sent to instance 0x…..” Can anyone kindly help ? Thanks.

inside the .h file:

- (void) goBackHandler;
- (void) goForwardHandler;
- (void) goSafari;

inside the .m file :

UIBarButtonItem *backButton=[[[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"back.png"] style:UIBarButtonItemStylePlain target:self action:@selector(goBackHandler)]autorelease];

UIBarButtonItem *forwardButton=[[[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"forward.png"] style:UIBarButtonItemStylePlain target:self.webViews action:@selector(goForwardHandler) ] autorelease];    

UIBarButtonItem *safariButton=[[[UIBarButtonItem alloc] initWithTitle:@"Safari" style:UIBarButtonItemStyleBordered target:self action:@selector(goSafari)]autorelease];

UIBarButtonItem *flex=[[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil]autorelease];

NSArray *arrayOfButtons=[[[NSArray alloc] initWithObjects:backButton,flex,safariButton,flex,forwardButton, nil]autorelease];

[self setToolbarItems:arrayOfButtons];





- (void) goBackHandler
{

if ([self.webViews canGoBack])
{
    [self.webViews goBack];
}

}

- (void) goForwardHandler
{
if ([self.webViews canGoForward])
{
    [self.webViews goForward];
}
}

- (void) goSafari
{
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:[self.webViews stringByEvaluatingJavaScriptFromString:@"window.location"]]];
}

Answer 1

It’s probably because of this line,

UIBarButtonItem *forwardButton=[[[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"forward.png"] style:UIBarButtonItemStylePlain target:self.webViews action:@selector(goForwardHandler) ] autorelease]; 

You have made self.webViews the target but I think you meant self.