iOS WebView JS 交互

<UIWebViewDelegate>

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

    NSString *path = [[NSBundle mainBundle] bundlePath];

    NSURL *baseURL = [NSURL fileURLWithPath:path];

    NSString * htmlFile = [[NSBundle mainBundle] pathForResource:@"html文件名" ofType:@"html"];

    NSString * htmlString = [NSString stringWithContentsOfFile:htmlFile encoding:(NSUTF8StringEncoding) error:nil];

    [self.webView loadHTMLString:htmlString baseURL:baseURL];

}

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {

    NSURL * url = [request URL];

    if ([[url scheme] isEqualToString:@"youdao"]) {

        UIAlertView * alertView = [[[UIAlertView alloc] initWithTitle:@"test" message:[url absoluteString] delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil] autorelease];

        [alertView show];

        return NO;

    }

    return YES;

}