iPhone - How may I know if an URL is a resource file?

I'm catching an url in shouldStartLoadWithRequest.

How may I know if it's one of my开发者_JS百科 project resources that is trying to be opened (for example with [self.webView loadHTMLString:htmlContentFinal baseURL:[NSURL fileURLWithPath:bundlePath]];), or something else ?

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You can check if URL string starts with file://:

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
    if (request.URL.isFileURL) {
        // do some stuff
    }
}

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How may I ensure that I am the one who loaded that file? The user could wrote that url in the url field himself.

You can implement -textFieldDidBeginEditing or -textFieldDidEndEditing and set some boolean properties to YES:

- (void)textFieldDidEndEditing:(UITextField *)textField {
    if ([[textField.text substringToIndex:7] isEqualToString:@"file://"]) {
        self.fileUrlEnteredManually = YES;
    } else {
        self.fileUrlEnteredManually = NO;
    }
}

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
    if (request.URL.isFileURL) {
        if (self.fileUrlEnteredManually) {
            // user entered "file://" manually
        } else {
            // user didn't
        }
    }
}

- (void)viewDidload {

    // ...

    fileUrlEnteredManually = NO;
    [webView loadRequest:yourLocalRequest];

}

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Check the [URL schema]. If it's file, then it's a local file. It won't be necessarily a bundle resource, though - could be a file in your app's Documents, for example.

To make sure it's in the bundle, match the beginning of the path with the bundle's path, available from the [NSBundle mainBundle]. Although I don't see why.